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LESSO WALTONPRODUCT MANUAL
Galvanized Steel Pipes Steel-Plastic Composite Pipes
www.walton.cn
GROUP PROFILE
CHINA LESSO
Established in 1986,LESSO (Stock Code: 02128.HK) is a global leader in home furnishings and building materials.The Group’s business portfolio spans plastic piping，buildingmaterials and home furnishings，environmental protection，new energy，supply-chain service platforms and others.It offers a wide range of products such as pipes，photovoltaics，plumbing and sanitary ware，integral kitchen materials,integral doors and windows,aluminum formwork and smart scaffolds，water purifiers，water-proofingmaterialsand sealants，fire-fighting equipment，valves,cables，lighting，hygienematerials,items for environmental protection，agricultural facilities，and oceanic aquaculture cages. In 2023, LESSO’s sales revenue reached over USD 4.38 billion.
10,000+ Products
Since implementing a strategy of globalization and expanding its global presence, LESSO has evolved into a sophisticated multinational.It boasts more than 30 advanced production basesworldwide，broadeningitsindustrial and sales networks to cover Asia，North America，South America，Europe，Africa，and Oceania.This enables LESSO to provide quality products and services for global customers in accordance with its continuously improved strategic layout in a timely and efficient way.
80 Subsidiaries
LESSO has founded its R&D center with more than 1,0oo scientific researchers, nationally accredited enterprise technology center，and two post-doctoral workstations to support its innovationand technical development.The Group has takena leading role in the revision of over 120 international and Chinese industry standards.LESSO owns over 3ooo patents (some of them are pending)，and provides over 10,ooo varieties of products，making it one of the most comprehensive manufacturers in the piping industry.Its products are utilized globally in different areas,including home decoration,civil construction,municipal water supply， drainage，energymanagement，power supplyand telecommunications， gassupply，fire-fighting，environmentalprotection, agriculture,oceanic aquaculture,etc.
30+ Production Bases
3000+ Patents
True to its idea of“Envisioning the Better,Building the Future”,LESSO remains committed to creatinga better livingenvironment,and advocating ideal cities featuring greenness,livability,and efficiency.With concerted efforts from various sectors,LESSO will fully play its role in sustaining healthy and beautiful space so that global residents could enjoyacomfortable life.
CONTENTS
01 LESSO Profile
03-04 LESSO WALTON Profile
05 Product Introduction
06-08 Hot Dip Galvanized Steel Pipes
09-10 Hot Dip Galvanized Electrical Metallic Conduits
11-12 Hot Dip Galvanized SeamlessSteel Pipes
13-17 Plastic-Lined Steel Composite Pipes for Water Supply
18 Plastic-Lined Seamless Steel-Plastic Composite Pipes
19 304 Stainless Steel Bushing
20-26 Plastic-Coated Steel Composite Pipes
27-31 Steel-Plastic Meter Manifold
32-33 Electric Hot Dip Plastic Steel Pipes
34-35 Plastic-Coated Spiral Steel Composite Pipes
36 Production equipment
37 Test Equipment
38-45 Pipe Installation
46 Honorary Certificates
COMPANY PROFILE
ZHONGSHANLESSOWALTON
Zhongshan Lesso Walton Coating Steel Plastic Pipe Co.,Ltd.isa holding subsidiary of China Lesso Group Holdings Limited(a listed company in Hong Kong, stockcode:2128),which NS foundedin 1994.Itis themainmanufactu ofsteel pipes in South China, witha total investmentof more than CNY120 million, andthefactorycovers n area of about46,000 m².It islocated inthe hinterland of the Pearl River Delta, hasconvenient ransportatior and nas strong technical force and network sales system.It has excellent equipmentand stable product quality.
The main products of the company include: Hot dip galvanized steel pipes，plastic-lined steel composite pipes forwater supply,plastic-coated steel composite pipes，steel-plastic meter manifold，electric hot dip plastic steel pipes,hot dip galvanized seamless steel pipes，plastic-coated spiral steel composite pipes, heavy protection hot dip galvanized wire conduit and accessories，and photovoltaic hardware accessories. The company uses the best quality raw materials, introducesthemost advancedinternationalor domestic productionequipment,adopts scientificand rigorous process flow,and implements international standardized management.The company strictly controls the product's quality.The product's quality meets or even exceeds the national standards.The products are widely used in water supply，drainage, power communication，gas，fire protection, photovoltaic newenergy,agriculture,and other fields. Among them，the plastic-lined steel composite pipe forwater supply is the ideal product for modern, environmentally-friendly sanitary watersupplyand urban water supply of different quality.
4 1
Relying on the strong scientific research strength of the parent company, the company has established the Engineering Technology Research and Development Center.The company has purchased advanced scientific research equipment.The company has taken the lead in developing a national key new product - plastic-coated composite steel pipe for water supply. Thecompany hasalso participated in the preparation andrevision of manynational standardsand industry standards (GB/T28897-2021，GB/T5135.20-2010, GB/T20041.1，GB/T20041.21，CJ/T120-2016，etc.). Relyingontheparent company'sresearchand development center at the international level，the company has carried outa series of cuting-edge research topics onsteel-plastic pipes.
Thecompany has fully passed the "International Quality ISO9001，Environmental ISO14001, Occupational Health，and Safety OHSAS18001 Management Systems" and "XHJS Water Saving Certification," "CBW" Product Identification Certification，"CQTAQualityVerification,""Green Building Selected Product Certification,"and "China Environmental LabelProduct Certification."The companyisa memberof the Drainage Equipment Branch of China Construction Metal Structure Association.Since 20o7，the company has been awarded the title of "Famous Trademarkof Guangdong Province," issued by the Guangdong Provincial Administration for Industry and Commerce. Since 2oo8,the company has been awarded the title of"Famous Brand of Guangdong Province," issued by the Guangdong Provincial Bureau of Qualityand Technical Supervision.
The products are exported to Hong Kong，the UK, Tanzania,Libya,Angola,Cameroon,Ethiopia,Djibouti， the United Arab Emirates,Saudi Arabia and other areas and countries.Duetotheexcellent product quality，stable performance，and perfect after-sales service, the company has won the praise of users.
The company has always adhered to the business policy of "Taking qualityas our lifeblood,science and technology asourstartingpoint，andcustomer satisfaction as our purpose." It has always promoted the development of the steel pipe and steel-plastic pipe industry. The company makes its own contribution toimproving the living environment and improving the quality of life of people around the world.
PRODUCT INTRODUCTION
Hot Dip Galvanized Steel Pipes
Product Introduction
The products comply with GB/T3091-2015,BS1387-1985,and EN10255 standard requirements, with smooth surface,uniform galvanized layer,and thickness in line with the standards,which can be widely used in domestic water transmisson pipes,fire PVC hoses,gas pipes,cold air pipes, sewage transmission,and industrial water supply engineering,etc.The company has a complete rangeof products,withsizes from 1 / 2 " to 1 2 "
Products Main Features
① The inner and outer surface color is bright and uniform;
② The welds are uniformly linear,and each pipe is tested by eddy current inspection;
③ The hot dip galvanizing process of steel pipe adopts a high grade 99.995% zero zinc ingot (highest purity),which has a strong anti-corrosion ability;
④ The appearance of each finished hot dip galvanized steel pipe is treated with special anti-corrosion treatment,which further extends theservice life of hot dip galvanized steel pipe.
⑤ The galvanized layer thickness is suficient; The outer diameter is standard; The ovality is good; The length is full;The rolling groove does not crack,etc.;
Applications
① Domestic water transmission pipes （204号 ② Fire fighting pipes ③ Gas pipes ④ Cold air pipes ⑤ Sewage
Hot rolled Roll High- Eddy current Fine Crew Withstand Pipe quality
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Productsize table
| Size | thickness | Size | thickness | Size | thickness | |||
| Nominal diameter DN(mm) | Inch(in) | mm | Nominal diameter DN(mm) | Inch(in) | mm | Nominal diameter DN(mm) | Inch(in) | mm |
| 15 | 1/2" | 2.00 2.30 2.75 | 65 | 2-1/2" | 2.50 2.75 3.25 3.50 3.75 | 150 | 6" | 3.5 4.00 4.25 4.50 |
| 20 | 3/4" | 2.00 2.30 2.75 | 4.0 2.50 | |||||
| 25 | 1" | 2.30 2.50 2.75 3.00 3.25 | 80 | 3" | 3.00 3.25 3.50 3.75 4.00 | 200 | 4.50 5.00 6.00 | |
| 32 | 1-14" | 2.50 2.75 3.00 | ||||||
| 40 | 1-1/2" | 3.5 2.50 2.75 3.00 | 100 | 3.25 3.50 3.75 4.00 | 6.50 7.00 | |||
| 3.25 3.50 2.50 | ||||||||
| 50 | 2 | 2.75 3.00 3.50 3.75 | 125 | 5″ | 3.75 4.00 4.25 | 300 | 12" | 5.50 6.00 6.50 |
Notes:
Hot dip galvanized pipe fittings
Threaded pipe fittings
Hot Dip Galvanized Electrical Metallic Conduits
Product Introduction
LESSOWALTON's electrical metalic conduits adopt welding steel pipe hot dip galvanized production process with different anti-corrosion levels,and the executive standards for products include GB/T20041.21-2017(Guangdong Liansu Technology Industrial Co.,Ltd.,a subsidiaryof LESSO,is one of the preparation participating units of this standard),and BS4568-1970.The pipe hasfire protection，corrosion resistance，simple structure features，etc.Itis suitable for the installation of wiring conduit protection in harsh environmentsand is the first choice in electrical engineering.
Products Main Features
① It has strong anti-corrosion ability,and the color of the galvanized layer is bright and uniform;
② The weld is smooth,with no burrs,and willnot damage the insulation layer of the wire;
③ Fireproof, strong resistance to bending and impact;
④ Easy to install and smooth connection by screw thread.
⑤ Strong rigidity,rat-proof.
Main application fields
Widely used in telecommunications, electrical and other fields.
Hot rolled Roll High- Eddy current Fine Crew Pipequality
coil slitting forming frequency inspection trimming cut inspection Pre-treatment welding
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\* Executive standard: GB/T 20041.21-2017 (Guangdong Liansu Technology Industrial Co., Ltd., a subsidiary of LESSO, is one of the preparation participating units of this standard)
| Hot dip galvanized heavy-duty pipe (Grade 4) | Size x Length (mm) | Wall thickness (mm) | Packaging (pcs/bundle) |
| 20×4000 | 1.6 | 10×10 | |
| Ω25×4000 | 1.6 | 10×10 | |
| 32×4000 | 1.6 | 10×10 | |
| Ω40×4000 | 1.8 | 5×10 | |
| 50×4000 | 1.8 | 5×10 |
Electrical metallic conduit fittings
\*Executivestandard:JB/T18593-1997
Hot Dip Galvanized Seamless Steel Pipes
Product Introduction
A hot dip galvanized seamless steel pipe is a type of high-strength steel pipe made of whole metal through the perforation process,whereas a blank pipe ismade by cold and hot roling or cold drawing.The process of pre-treatment, hot-dipgalvanizing,and post-treatmentis used to create a steel pipe with no seam on the surface.The connection modes can be threaded,grooved,welding, etc.According to the production method,seamless pipes are divided into hot roled pipe，cold rolled pipe,cold drawn pipe,extruded pipe,pipe jacking,etc.The materials include ordinary and high-quality carbon structural steel (Q215-A\~Q275-A and 10\~50 steel)，lowalloy steel (09MnV, 16Mn,etc.),aloy steel,stainlessacid-resistantsteel,etc.The product size is 22-Φ325,the length is 6 ~ \mathsf { m } ，and the rated working pressure is less than or equal to 2.5MPa.The connection mode is the same as that of hot dip galvanized steel pipe.
Executive standard:GB/T8163-2018 Seamless Steel pipes for liquid service.
Products Main Features
① The innerand outersurface color is brightand uniform. The galvanized layer thickness is sufficient, which meets the requirements of GB/T8163-2018.
② High-temperature resistance,impact resistance,fatigue resistance,and good toughness.
③ High tensile strength,excellent creep resistance,corrosion resistance,and impact resistance.
④ Excellent mechanical properties and workability.
⑤ High pressure resistance and good pressure resistance.
⑥ Hot dip galvanizing adopts high grade 9 9 . 9 9 5 % zero zinc ingot with strong corrosion resistance.
⑦ Theservice life is long.The outer surface of each finished hot dip galvanized seamless steel pipe is treated with special anti-corrosion treatment,which further extends the service life of the steel pipe.
Mainapplication fields
It is generally usedasa pipe forconveying fluids,such as pipes forconveying oil,natural gas,coal gas,water,and some solid materials,etc.
1.Appearance
1.1 The inner and outer surface of the steel pipe are not allowed to have visible cracks,folding, scaring,pricking,or separationof layers.These defects should be completely removed, the removal depth should not exceed the negative deviation of the nominal wal thickness,and the actual wallthickness at the cleaning place should not be less than the minimum value allowed by the wall thickness deviation.
1.2The innerand outer surfaces of the steel pipe should have a completely galvanized layer.There should be no black spots,bubbles,zinc slag,or particles that are not plated with zinc.In addition, the surface should be smooth.The surface of the steel pipe should be passivated after galvanization.
1.3 The pipe should be straight,and the sections at both ends should be perpendicular to the pipe axis.The section should be flat, with no incision burrs,and should not be chamfered.
2.Performance requirements
2.1 Tensile properties:The longitudinal tensile properties of the steel pipe under delivery should complywith the provisions of Table 7 in GB/T8163-2018.
2.2 Crushing test: No cracks or gaps are allowed in the specimen after crushing test.
2.3 Expansion test: No cracks or gaps are alowed in the specimen after the expansion test.
2.4Bending test:When the steel pipe's outer diameter is not greater than 2 2 { \mathsf {mm } } for the bending test, the bendingangle should be 9 0 ^ { \circ } ,thebendingradiusshouldbe6 times thesteel pipe's outer diameter,and no cracks or gapsare allowed in the bending place after bending.
2.5 Hydraulic test: The maximum test pressure should not exceed 19.0MPa. Under the test pressure, the pressure regulation time should not be less than 5s,and the steel pipe should not be allowed to leak.
3.Quality of galvanized layer
3.1 Galvanized layer's weight:The total weight per unit area of the galvanized layer on the inner and outer surfaces of the steel pipe should not be less than 3oo g/m2.
3.2 Uniformity of galvanized layer: Galvanized steel pipe should be tested for uniformity of galvanized layer.During the test,the specimen should be continuously impregnated in copper sulfate solution 5 times without changing red (copper plating color).
3.3Adhesion of galvanized layer:After the test, the peeling phenomenon of the galvanized layer is not allowed in the specimen.
PlasticLined Steel Composite Pipes for Water Supply
Product Introduction
The plastic-lined steel composite pipe for water supply isa galvanized steel pipe-based pipe, which has both the mechanical strength of steel pipeand the anti-corrosion properties of plastic pipe by plastic-lined pipe.It uses aself-produced galvanized steel pipe and plastic-lined pipe.The rawmaterials of the lined pipe are pure imported PE plastic particlesand hot melt adhesive and are produced by international or domestic advanced extrusion production lines.The plastic-lined composite pipes include lined PE and lined PE-RT series,inwhich the lined PE composite pipe is suitable forcold water transportation.The lined PE-RT composite pipe is suitable for hot water transportation.
Products Main Features
Good corrosion resistance:The inner wall plastic layer of the plastic-lined steel composite pipe for water supply has strong adhesive force,high density,and good corrosion resistance,which can effectively extend the service life of the pipe.
Good mechanical strength:The plastic-lined steel composite pipe for water supply has the same mechanical strengthas the hot dip galvanizedsteel pipe.It hasastrong tolerance to theexternal influence of impact, bending,and pressure.
Good hygienic properties:The plastic pipe formed by polyethylene is non-toxic,tasteless,and polution-free，and the health standards meet the safety evaluation standards of the national drinking water transmissionand distributionwater equipment and protective materials.
Low fluid resistance:The inner wallof the plastic-lined composite steel pipe for the water supply is smooth,the frictioncoeficient issmall,it isnot easy toaccumulate scale,the fluid resistance is small,andthewaterflowisnotblocked.
[Note] Long-termcarrier temperature:Cold water pipe <=slant 4 0 ^ { \circ } { C } ：hotwaterpipe≤70℃
Main application fields
Product structure and composition
① Civil water supply ② Industrial water supply ③ Fire fighting pipe ④ Communication circuit （204号 ⑤ Optical fibercable ⑥ Gas transmission and food processing ⑦ Medical equipment and machinery
Production process flow chart of plastic-lined pipe
Galvanizedsandbnasting Tenpr Preheating Pressurizing Depresurizing inSuaction Packaningiand □□ \□ ?8
Lined pipe production process flow
Production process flow chart of plastic-lined pipe fitting:
| Inspection items | Specimen diameter (DN) | Specimen length (mm) | Experience requirements | Thequalitymust meet the followingstandards |
| Bond strength test | 15-300 | 20 | whtejntsresureaparated | |
| Crushing test | >50 | 50 | The diameter iscompressed to 3/4D | There is no separation betweensteelandplastic |
| resiStaldancy hoetest | 15-300 | 200 | Takea 200 mm long tube section specimen,soak it in 95℃±2℃ hot water for 30 min,take it out and cool itnaturallyatnormal temperaturefor 10 min,thenimmerse it in5℃±2℃ cold water for 30 min,take it out and puritominetaoatemperating cycle.After repeated three cycles, the middle section of the specimen isintercepted20mmaccording to the standard 8.3 for the bonding strength test. | Gualtr h.s Pr |
| Bending test | 15-50 | 400-800 | Bend 10°,bend radius 8D | Noseparation |
| Nominaldiameter | Plastic-lined pipe | Plastic-lined steel pipe | |
| DN | IN | Thickness (mm) | length (mm) |
| 15 | 1/2 | 1.5 ±0.2 | 6000+15 |
| 20 | 3/4 | ||
| 25 | 1 | ||
| 32 | 1 1/4 | ||
| 40 | 1 1/2 | ||
| 50 | 2 | ||
| 65 | 2 1/2 | ||
| 80 | 3 | ||
| 100 | 4 | ||
| 125 | 5 | ||
| 150 | 6 | ||
| 200 | 8 | 2.5 ±0.2 2.5 ±0.2 | |
| 250 | 10 | 3.0 ±0.5 | |
| 300 | 12 | ||
Plastic-lined (PE) steel composite pipe for water supply (for cold water)
\*Executive standard: GB/T28897-2021 (Zhongshan Lesso Walton Coating Steel Plastic Pipe Co.,Ltd, asubsidiary of LESSO, is one of the preparation participating units of this standard)
| compositeiedPE)sty | Nominaldiameter | compsitecliedPEsesy | Nominaldiameter | ||||
| Pipe type | DN | IN | Grooved pipe | Pipe type DN | IN | ||
| 15 1/2 | 50 | 2 | |||||
| 1 = | 20 3/4 | 65 | 2-1/2 | ||||
| 25 | 1 | = | 80 | 3 | |||
| 32 | 1-1/4 | 100 | 4 | ||||
| 40 | 1-1/2 | 125 | 5 | ||||
| 50 | 2 | 150 | 6 | ||||
| 65 | 2-1/2 | 200 | 8 | ||||
| 80 100 | 3 | - | 250 | 10 | |||
| 4 5 | = | 300 | 12 | ||||
| 125 | |||||||
| 150 | 6 | ||||||
| 200 | 8 | ||||||
| 1 = | 250 | 10 | |||||
| 300 | 12 | ||||||
Plastic-lined (PE-RT) steel composite pipe for water supply (for hot water)
\*Executive standard: GB/T28897-2021(Zhongshan Lesso Walton Coating Steel Plastic Pipe Co.,Ltd, asubsidiary of LESSO, is one of the preparation participating units of this standard)
| Plastic-lined (PE-RT) steel compositepipe forwatersupply | Nominaldiameter | Plastic-lined (PE-RT)steel compositepipeforwatersupply | Nominaldiameter | ||||
| Pipe type | DN | IN | Grooved pipe | Pipe type | DN | IN | |
| 15 | 50 | 2 | |||||
| 1 = | 20 | 65 | 2-1/2 | ||||
| 25 1 | 80 | 3 | |||||
| 32 | 1-1/4 | 100 | 4 | ||||
| 40 50 | 1-1/2 | 125 | 5 | ||||
| 65 | 2 | 150 | 6 | ||||
| 80 | 2-1/2 | 200 | 8 | ||||
| 100 | 3 | 250 | 10 | ||||
| 4 5 | = | 300 | 12 | ||||
| 125 | |||||||
| 150 | 6 | ||||||
| 200 | 8 | ||||||
| 1 = | 250 | 10 | |||||
| 300 | 12 | ||||||
Plastic-lined (PP-R) composite pipe for water supply (for cold and hot water)
\*Executive standard: CJ/T 137-2008
Special notes:
1pls Pleaseselectpastdidtoaddhuatdid be machined and chamfered by the customer. 2Aftert
Plastic-lined seamless steel composite pipe
Product Introduction
Plastic-lined seamless steel compositepipe isapipe productwithboth the mechanical strengthsof steelpipe and the anti-corrosionpropertiesof plastic pipe,which is basedonseamless hotdipgalvanized stee pipeandlined witha plasticpipe byadvancedcompositetechnology.Therearetwoseriesofliningmaterials,PEandPE-RT,among which the linedPEcompositepipeissuitableforcold waterhigh-pressretransportation,and theinedPE-RTissuitable for hotwater high-pressure transportation.Thecommon base pipe material gradeis20#steel.The product size is22- Φ325,the length is6m,and therated working pressureis lessthanorequalto2.5MPa.Theconnection mode is the sameasthatof plastic-linedcomposite steel pipe for water supply,which is usualyconnected by screw threador groove.
Executive standard: GB/T 28897-2021 "Steel-plastic compound pipes and fitings for fluid service
Product features
1.Thesurface colorofthebase pipe isuniformand bright,and the thicknessofthegalvanized layerissuffcient.The zincingotadopts high grade 99.995%zero zinc ingot with strong corosion resistance.Itmeets the requirementsof GB/T8163-2018.
2.High temperature and pressure resistance,impact resistance,fatigue resistance,and good toughness.
3.High tensile strength,excellent creep resistance, corrosion resistance,and impact resistance.
4.Theservice life is long.Theouter surfaceof each finished hotdipgalvanized seamlesssteelpipeis treated with special anti-corrosion treatment,which further extends the service life of the steel pipe.
5.Theinnerwallplastic layerhas strongadhesive force,excellntcorrosionresistance,and hygienic properties.The surface of theplastic layer issmooth,tefrictioncoefficientandfluidresistancearesmal,it isnoteasy to accumulate scale,and the fluid permeability is high.
Main application fields
It ismainlyusedinighpressurewatersupplycommunicationopticalfiber,oil,naturalgas,coalgas,foodproceing medical treatment,etc.
Production process flow
| Name | Size | Pakity | Remarks | ||
| diametr(mm) | Inch(in) | Thickmess | (pcs/bundle) | ||
| Plastic-lined (PE) seamlesssteel composite pipe (for cold water) | 76 | 2-1/2" | 4.0 | 37 | 1. The price of the pipe does not include freight. 2. The length of the pipe is 6 m. 3. tisrecurmendedto.cosulthe deliyery Note: Pressing hole processing fee: CNY6/PCSfor76mm-114.3mmsizes; CNY 8/PCS for 159 mm-325 mm sizes. |
| 89 | 3" | 4.0 | 19 | ||
| 114.3 | 4" | 4.0 | 19 | ||
| 159 | 6" | 4.5 | 10 | ||
| 168 | 6" | 5.0 | 10 | ||
| 219 | 8" | 6.0 | 7 | ||
| 273 | 10" | 7.0 | 3 | ||
| 325 | 12" | 8.0 | 3 | ||
304 Stainless Steel Bushing
Product Introduction
The stainless steel bushing isanannular component withaflanged edge onone end that can protect a plastic-lined steel pipeoraplastic-coatedpipe end.Itismadeoffood grade304 stainlessteel material.Ithas excelentchemical andmechanical properties suchas highcorosionresistance，wearresistance，heat resistanceand low leakage resistance.Italsohas hygienicpropertiessuchasnon-toxicityandnoprecipitates,aswellasadvantagessuchas smoothinnerwall,smallwaterresistance,anti-scalingandstrengthathightemperatures,long servicelifeandhigh reliability.Thestainlesssteelbushingisplacedontheinnerwalloftheplastic-linedpipeor theplastic-coatedpipeend, and thespecial hydraulic expansion deviceisused tostrengthen the innerwall.Thegroove operationcan overcome thesteelandplasticseparatingcausedbyimpropergroovedamage tothepipeend,effectivelyprotecting thesteel and plasticcompositelayerof thepipeendingoodcondition,preventing theerosionbetween thesteeland plasticof the pipeendcausedbytheconveyingmedium.Inadition,the high-speed impact generatedinfluidtransportation ensuresthesafetyofwaterqualityandtheservicelifeofthepipe,sothepipingsystem'sreliabiltyiseffectively guaranteed.Itissuitable for end protectionconnections of steel-plasticcomposite pipes with theDN greater thanor equal to 50.
\* Executive standard: GB/T17219
| Name | Size | Packing | Remarks | |
| diamettr(mm) | Inch(in) | (pcs/carton) | ||
| 304 Stainless Steel Bushing | 50 | 2 | 300 | 1. The price of the bushing does not include freight. 2.The stainless steel bushing is a universal type,which issuitable for |
| 65 | 2-1/2 | 300 | ||
| 80 | 3 | 200 | ||
| 100 | 4 | 100 | ||
| 125 | 5 | 60 | both plastic-lined (PE) steel compositepipesforwatersupply (for cold water) and plastic-lined (PE-RT) steel composite pipes for water supply (for hot water). | |
| 150 | 6 | 60 | ||
| 200 | 8 | 30 | ||
| 250 | 10 | 10 | ||
| 300 | 12 | 5 | ||
| Name | Size | Packing | Remarks | ||
| diameter(mm) | Inch(in) | Thickmess | (pcs/bundle) | ||
| Plastic-lined (PE) steelcomposite pipeforwatersupply (for cold water with liner) | 50 | 2 | 3.5 | 37 | 1. Both ends of the pipe are equipped with 304 stainless steel bushings. 2. The pipe length is 6 m/pcs. 3. The price of the pipe includes the pressing hole processing fee but does not include the freight. 4.304 stainless steel bushing can be purchasedseparately.See the "304 sainesrstelbushinuottio |
| 65 | 2-1/2 | 3.75 | 37 | ||
| 80 | 3 | 3.75 | 19 | ||
| 100 | 4 | 3.75 | 19 | ||
| 125 | 5 | 3.75 | 10 | ||
| 150 | 6 | 4.25 | 10 | ||
| 200 250 | 8 | 5.5 6.0 | 7 3 | 5.Pipeif-lined Psuply cai be used witRomplinePCU | |
| 300 | 10 | 6.0 | |||
| 12 | 3 | ||||
Plastic-Coated Steel Composite Pipes
PlasticCoated Steel Composite Pipes
Product Introduction
Theplastic-coated steel composite pipe takes thegalvanized steel pipeorsandblasted steel pipeasthe base pipe. Itusesacoating process toapplyepoxyresin powder (EP)orpolyethylene powder (PE)tothe inner wall orouter wallofthebasepipeafterchemicalorphysicaltreatmenttoformalayerofnon-toxic,odorless,smooth,andclean anti-corrosion layer.Ittakesaself-producedgalvanizedsteelpipeasthebasepipeandisproducedwith international ordomesticadvanced production equipment,processes,and powdercoatingsof wellknown brands. "Steel-plasticcoating technology"isakeypromotionprojectof nationalscientificandtechnologicalachievements.
Products Main Features
Good corrosion resistance:The inner wallor innerand outer wal plastic layersof the plastic-coated composite steelpipehavestrongadhesive force,highdensityandgoodcorosionresistance,whichcaneffctivelyextend the service life of the pipe.
Good mechanical strength:The plastic-coated composite steel pipe has the same mechanical strength as the hotdipgalvanized steelpipeand hasastrongtolerance totheexternal influenceof impact，bending，and pressure.
Good hygienic properties:The plastic layer formed by polyethyleneor epoxy powder is non-toxic,tastelessand polution-free,andthe health standardsmeet thesafetyevaluationstandardsof thenationaldrinking water transmission and distribution water equipment and protective materials.
Lowfluidresistance:The inner wallof theplastic-coated composite steelpipe issmooth,the frictioncoefficient issmall,itisnoteasytoaccumulatescale,thefluidresistanceissmallandthewaterflowisnotblocked.
[Note] Carrier temperature:Room temperature
Mainapplication fields
Product structure and composition
Product size table
\*ExecutivestadardGB8ndGB5ZoganLoWatonCoatingSteePasticipeCodndGuagdgLa TechnologyIdustrialCo.,Ltd.,twosubsidiariesofLESSO,aretwoof thepreparationparticipatingunitsofthisstandard)
| Nominal diameter | Innerc kastic cmating | Plastic-cpoated | ||
| DN | IN | Polyethylene (PE) | Pure epoxy resin (EP) | Length (mm) |
| 15 | 1/2 | >0.4 | >0.3 | 6000+20 |
| 20 | 3/4 | |||
| 25 | 1 | |||
| 32 | 1-1/4 | |||
| 40 | 1-1/2 | |||
| 50 | 2 | |||
| 65 | 2-1/2 | >0.5 | >0.35 | |
| 80 100 | 3 4 | |||
| 125 | 5 | |||
| 150 | 6 | |||
| 200 | 8 | |||
| 250 | 10 | >0.6 | ||
| 300 | 12 | |||
| Characteristic | Requirement | |
| Pinhole test | No electric sparks are generated | |
| Adhesion test | Epoxycoating: grade1~3; Polyethylenecoating≥30N/CM | |
| Bending test (diameter ≤50mm) | Testbendingangle:The test bendingangle for polyethylene plastic-coated compositesteel pipe is 90°,and that for epoxy plastic-coated composite steel pipe is 30°.The coating with | |
| a bending radius of 8D does not flake or break Epoxycoating:4/5of theouterdiameter， | ||
| Crushingtest(diameter>50mm) Resistance to externalblows | polyethylenecoating:2/3of theouterdiameter The coating does not flake or break | |
| Turbidity | ≤0.5 | |
| Angle | ≤1 | |
| Potassium permanganate consumption (mg/L) | ≤2 | |
| Reductionof residual chlorine (mg/L) | ≤0.7 | |
| Odor Taste | No abnormality | |
| Innercoatingtesttemperature | No abnormality | |
| -25℃-55°℃ Comply with British standard BS1387,and GB/T 3091 | ||
| Physical requirementofsteel pipe Hygienic requirement of steel pipe | ||
| Comply with Chinese standard GB/T 17219 | ||
Plastic-coated (PE) composite pipe fitting for water supply (inner coating for cold water)
\* Executive fiting standard: Q/LSWT 31-2022 (enterprise standard)
Plastic-coated (PE) composite pipe fitting for water supply (inner and outer coating for cold water)
\* Executive fitting standard: Q/LSWT 31-2022 (enterprise standard)
Grooved pipe fittings
lastic-coated (EP) steel composite pipe (inner and outer coating for fire protection)
\* Executive standard: GB/T5135.20-2010 (Guangdong Liansu Technology Industrial Co., Ltd., a subsidiary of LESSO,is one of the preparation participating units of this standard)
| Plastic-cianed aEd ster comiposite forfireprotection) | Nominal diameter | Nominal diameter | Remarks | ||
| DN | IN | DN | IN | 1.Pipe coating form: Inner and outer coating. 2.Pipe working pressure ≤1.6MPa. 3. The length of each pipe is 6 m. 4.Plastic-coated (EP) steel composite pipe (innerand outer coating for fire protection) can be used with plastic-coated (EP) composite pipe fittings (inner and outer coating for fire protection). | |
| 15 | 1/2 | 200 | 8 | ||
| 20 | 3/4 | 250 | 10 | ||
| 25 | 1 | 300 | 12 | ||
| 32 | 1-1/4 | ||||
| 40 | 1-1/2 | ||||
| 2 | |||||
| 50 | 2-1/2 | ||||
| 65 80 | 3 | ||||
| 100 | 4 | ||||
| 125 | 5 | ||||
| 150 | 6 | ||||
Plastic-coated (EP) composite pipe fittings (inner and outer coating for fire protection)
\* Executive fitting standard: GB/T5135.11-2006 and Q/LSWT 26-2022 (enterprise standard)
pipe/blanikpipe Spndspating/ Preheating Powying Curing inSpuaton Pakegingiand □□ ン山 口 ?0…
SteelPlastic Meter Manifold Product Introduction
Product structure
Mainmaterials: The steel pipe is made of high-frequencywelded pipe andPPpolypropylene.
Amanifold isawaterdistributionand collectiondeviceused toconnect various heating pipes for water supplyand return ina water system.Itisdivided intomanifoldsand watercolectorsaccording tothesupplyand returnof water.Itiscommonly knownasa "Manifold."When therearemorepipes,if toomanytee,cross,and other accessoriesareused,theenergylossof thesystem isgreat.Theuseof manifoldefectivelyavoids the loopholes inwatersupply management.Water metersare installed and managedcentraly.Inaddition,the single pipeadopts multiple channels to reduce the costof pipe procurement, greatly reduces the construction time,and improves workeffciency.Thetapwater manifoldisdirectlyconnected tothemain water supplypipe through reducing joint, andthewater metersarecentrall installed in the watermeterpool (watermeterroom),sothatone household has one meter foroutdoor instalationand viewing.Afterusing themanifold,the pipes haveclear routes,are easy to operate,disassemble,and maintain,and have a high economy.
At present,thewaterdistributionsystemforwater meters has beenignored in thetapwater instalationproject, and the traditional material structureand instalation processmethod have many problems,suchas high laborand time-consuming，inconvenient instalationandmaintenance，corrosionandrust,water leakage,andsecondary polution.Itis in thecontext of such market demand that Zhongshan Lesso Walton Coating Steel Plastic Pipe Co.,Ltd.hasdevelopedand producedanewsteel-plastic metermanifold with theadvantagesof safety and reliablity，environmentalprotectionandenergysaving，corrosionresistance，convenientinstalation，and maintenance,longservice life,etc.,which has been greatlyappliedinthefieldof instalationand transformationof tapwaterengineeringand hasbeenwell received byusers.
The manufacturing process of LESSO WALTON's steel-plastic meter manifold is that themainpipeand branch pipeare welded with high strength and then treated with hotdip galvanized anticorosionand rust preventionafter complete sets.Finaly,the innerwallofthepipeiscompletelycovered withPP-R injection intoaseamless cavity. Theedgeof thepipemouth isalsocoveredwithPP-Rmaterial tocompletely isolate thecontactbetweenwater andsteel pipe,whichcannotonlyensure thestructuralbearingstrengthof themanifold butalso help toeliminate secondary waterpolutionand the hot dip galvanizing processhas stronganti-rust abilityand long service life. On-sitemodularinstallation significantlysaves laborandtimecostsand is highlyeficient,makingyou worry-free.
Combined type (single-household type)- Steel-plastic meter manifold
Executive standard:Q/LSWT10-2022 (enterprise standard)
ll
Single-household galvanized Steel-PlasticMeterManifold
Tee pipe fittingassembly galvanized steel pipe Metermanifold
八
1
Advantages
Disadvantages
1. It adopts an integrated design to reduce processingcosts, improve installation efficiency, reduce labor and time costs, and can be stored in batches.
2. It has only three threads, reducing the risk of leakage and rust.
3. The plastic-lined integrated full coverage of the inner cavity solves the problemof secondary water pollution in the position of multiple joints.
4. The plastic coating coverage process prevents water from penetrating the inner wall of the steel pipe and causing secondary pollution.
1. It combines three parts into one, improving the processing cost, labor, and time costs.
2. It has five threaded couplings, which increases the risk of water leakage and rust, and the repair rate is high.
3. The couplings are connected by multiple pipe fittings, so that the gap cannot be fully covered by the lining plastic, thus increasing the risk of iron exposure and secondary water pollution.
4. The edge of the lined plastic short pipe of the cut sleeve is not covered by lined plastic, and it is easy to falloff, causing water to penetrate between the inner wall of the steel pipe and the lined plastic, causing secondary pollution.
Combined type (single-household type)- Steel-plastic meter manifold
Executive standard:Q/LSWT10-2022 (enterprise standard)
1. Standard type
A-105mmB-35mmC-190mmD-105mm
2. Standard rib type 180°
A-105mmB-35mmC-190mmD-105mm
| Modelandspecification | speificaion | Bpranchbton | SizmA | SizmB | SizmC | SizmD | |
| Steel-plastic Dn40 | DN40*190*15 | DN40 | 15 | 105 | 35 | 190 | 105 |
| DN40*190*20 | DN40 | 20 | 105 | 35 | 190 | 105 | |
| DN40*190*25 | DN40 | 25 | 105 | 35 | 190 | 105 | |
| Steel-plastic Dn50 | DN50*190*15 | DN50 | 15 | 105 | 35 | 190 | 105 |
| DN50*190*20 | DN50 | 20 | 105 | 35 | 190 | 105 | |
| DN50*190*25 | DN50 | 25 | 105 | 35 | 190 | 105 | |
| Ste-plastic | DN65*190*15 | DN65 | 15 | 105 | 35 | 190 | 105 |
| DN65*190*20 | DN65 | 20 | 105 | 35 | 190 | 105 | |
| DN65*190*25 | DN65 | 25 | 105 | 35 | 190 | 105 | |
3. Right angle type 90°
A-105mmB-35mmC-190mmD-105mm
Instructions:
Prefabricated type (multiple-household type)- Steel-plastic meter manifold
Executive standard:Q/LSWT 10-2022 (enterprise standard)
Field applications of some products
Prefabricated type (multiple-household type)- Steel-plastic meter manifold
Executive standard:Q/LSWT10-2022 (enterprise standard)
Comparedwithtecombinedtypeoftraditionapipefitings,thesteelplasticmetermanifoldsvesaotfaborcosts,educeteof leakageoftheouplindsnsthssfttaddouplin'serabilttosterallstrenthismprovdtt waterleakage caused bydeformationdue to problems suchas subsidence.
Theprefabricaedinstalltioetdimproestinstallaionincndsetyasoablesinstructureandadeding proce,anditeedstdposbfateriondtocturaltretd conectionstrengthTeweldedstelplasticmetermanifoldisgreatlysuperiortomanifoldsitermsofstructuralrationalitandeonomy
Specifications and models of prefabricated multiple-household series
Instructions:
| Modelandspecification | SimmA | SimmB | SizmC | SimmD | |||
| Steel-plastic Dn40 | DN40*160*15/20 | DN40 | 15/20 | 70 | 35 | 160 | 145 |
| DN40*170*15/20 | DN40 | 15/20 | 70 | 35 | 170 | 155 | |
| DN40*185*15/20 | DN40 | 15/20 | 70 | 35 | 185 | 170 | |
| Steel-plastic Dn50 | DN50*160*15/20 | DN50 | 15/20 | 70 | 35 | 160 | 145 |
| DN50*170*15/20 | DN50 | 15/20 | 70 | 35 | 170 | 155 | |
| DN50*185*15/20 | DN50 | 15/20 | 70 | 35 | 185 | 170 | |
| DN50*185*25 | DN50 | 25 | 70 | 35 | 185 | 170 | |
| Steel-plastic Dn65 | DN65*160*15/20 | DN65 | 15/20 | 70 | 35 | 160 | 145 |
| DN65*185*15/20 | DN65 | 15/20 | 70 | 35 | 185 | 170 | |
| DN65*185*25 | DN65 | 25 | 70 | 35 | 185 | 170 | |
1. Steel-plastic meter manifold-Standard type
2. Steel-plastic meter manifold- 180°
Electric Hot Dip Plastic Steel Pipes
Product Introduction
Withtherapiddevelopmentof power utilitiesand theinformation industry,environmental protection issues have graduallyatracted people'sattention.Grounded cables havebeen promoted onalarge scale inthe construction andtransformation of urban power grids and pipe coridors,making power threading pipes more and more widelyused.The threading pipes made of the coating processare simple toconstruct,require less investment, andare convenient to maintain.It is not onlyconducive to the improvementof urban appearance,trafic,and the environment but also can avoid the mutual influence between cablesand the influence of other underground pipelinesoncables.It greatlyreducesthe failure of wiresand cables caused byexternal damage and prolongs theservice lifeof wiresandcables.Therearemany kindsof threadingpipes inpower systemswithdifferent performances,but hot dipplastic steel pipes have both the advantages of steel pipesand plastic pipes,which is theidealdevice toprotectcables.At present,the productson the marketareof varyingquality,and thenames are notthesame,suchas plastic-coated steel pipeforcables,hotdip plasticcable threadingpipe,hotdip plastic steel cable protection pipe,cable protection pipe,and hot dip plastic steel cable conduit.
The electric hot dip plastic steel pipe developed by Zhongshan Lesso Walton Coating Steel Plastic Pipe Co, Ltd. takes theself-produced flamed high-frequency welded steel pipeas the base pipe.It is produced with advanced production equipment,processes,and powder coatings of well-known brands.It isanewtypeofcomposite pipe made of PE powder or other coatings on theinnerand outer wals of the steel pipe to formanon-toxic,tasteless, smooth，and clean anti-corosion layerby using dipping or inner and outercoating method through hightemperature preheating,inner and outer wall spraying and curing flow equal coating process,which can be conected intwomethods:Socketand sleeve.According tothe diferentanti-corosion levels,itcan bedivided intoa singleanti-corrosion conduit (referredtoas N-HAP)and a doubleanti-corrosion conduit (referred to as DFPB).N-HAP (the company's conventional product) is directly coated witha layer of polyethylene powderafter sandblasting,dustremoval,andotherprocessesonthesteel pipe.D-FPBis hot-dipgalvanizedonthesteel pipe andthencoatedwitha layerof polyethylenepowder.Itisused inpowerprotectionprojectsin various environmentsduetoitsgoodanti-staticandanti-interferenceabilityof externalsignals.Theproductsizeis DN15- DN300,and the general color is black (which can be customized according to customer needs).
Products Main Features
1.It has good weather resistance and low-temperature resistance and can be buried fora long time;
2.The inner wallis smooth without burrs,and the cable will not be scratched when threading;
3.It has excellent surface coating insulation performance.Itcan be flame retardant,resistant to high pressure, andblock currentconductionto the pipeline;
4.It uses steel as the base,so its shielding ability of external signals is strong;
5.The coating layer has good chemical stability and does not react with other substances.It has good anti-corrosion performance and is rust-free and non-aging;
6.Ithas the same physicaland mechanical propertiesas thesteelpipeand hasastrong tolerance to the external influence of impact, bending,and pressure. Long service life.
7.It has excellent coating adhesion performance.Adhesion strength >=slant 35N/cm.The coating has lowwater absorption ( < 0 . 0 0 0 3 % and good flooding tolerance.
[Note] Temperature range:-40C-80℃
1. Base pipe
1.1The tensile,bending,crushing,and other properties should comply with the provisions of the GB/T3091 standard.
1.2The rust removal grade of shotblasting (blasting) should be Sa2.5,and the depth of the anchor patern should be >=slant 3 0 ~ \mathsf {mm } （20
2. Appearance
2.1The innerand outer surfaces should be smooth,and no bubbles,cracks,peeling,scars,dents,uneven color anddiscoloration lines are allowed.No separation or cracking is permitted between the steel pipeand the coating.There should be no sharp edges,burs or surface protrusions inside.Coating thickness { >=slant } 3 0 0 um.
2.2The color of the pipe should be uniform,and the color of the innerand outer surfaces should be basicaly consistent with the color of the corresponding color palette.
2.3There should beno burs in the inner and outer weldsof al base pipes (including sandblasted welded pipes), the height of the inner welds should be - 0 . 2 ~ 0 . 5mm and there should be no incision burrs in the sections at both ends.The pipe should be straight,and the sectionsat both ends should be perpendicularto the pipe axis.
3.Performance requirements
3.1Pressure test: The outer diameter change under pressure should be <=slant 2 5 % and the outer diameter change after removing the pressure and steel block should be <=slant 1 0 % #
3.2Pinhole test: The EDM tester is used.Under 1.5KV voltage,there should be no EDM phenomenon.
3.3Electrical insulation strength test: No breakdown at 2 . 0 1 < V for 15min.
3.4Flameresistancetest:The specimen isnotignited bythe testflame,or thespecimen is ignited,butafter removing the testflame,the flameofthe specimen isextinguished within 30s,and the silkpaper laid under the conduit does not burn.After the specimen is burned with flame or without flame,there should be no sign of burning or charring within 5 0 ~ \mathsf {mm } below the lower edge of the upper fixture.
3.5 Corrosion resistance test: Each degreased specimen should be continuously immersed in copper sulfate aqueous solutionwith a mass density of 1 . 1 8 6 \mathsf {kg } / \mathsf { L } at ( 2 3 + 3 ) ^ { \circ } C for4 consecutive times,and each immersion should last for1 min±5s.At the end of the test,copper precipitates that cannot be washed awayin tap water should not appear in the specimen.
PlasticCoated Spiral Steel Composite Pipes
Product Introduction
Thespiralsteel pipeis madeofstripsteelcoilplateasrawmaterial.Thestripsteelissent tothe weldingpipeset,rolled by multi-channel rolls.The strip steelis gradualy rolled upand bent inaspiral shapeto forma circular pipe blank with an open gap,and the rolling reduction of the extrusion roll is adjusted to control the weld gap within 1 ~ 3 \ \mathsf {mm } The welding joint's twoendsare flushed before being welded usinganautomaticdouble-wire,double-sided submerged arc welding process.The main materialsare Q235A,Q235B,10#,20#,and Q345(16Mn).Ittakesspiral steel pipeas thebasepipe,andanon-toxic,tasteless,smooth,and cleananticorrosive layerisformedbyapplyingplasticepoxy resincoating (EP)orpolyethylenepowder(PE)onitsinnerandoutersurfacesaftersandblastingorshotblasting.The product size is DN200-DN2400.The length is generally 1 2 m and other sizes can be customized.Itadopts the socket orflangedand welded connectionmodes.The product haspassed the inspectionand certficationof the National Research Center of Testing Techniques for Building Materials.
Products Main Features
1.During themoldingprocess,thestelplatedeformation isuniform,theresidualstress issmal,andthesurfaceis not scratched.
2.Adopt an advanced double-sided submerged arc welding process to avoid defects such as wrong edge,welding deviation,and incomplete welding,and easy-to-control welding quality.
3.The spiral shapeof the weld is evenly distributed on the circumference of thespiral pipe,with high dimensional accuracy and stronger impact resistance and pressure withstand than the straight seam welded pipe.
4.Theinnerandouterwallplasticcoating layer hasstrongadhesive force,highdensity,acidandalkali resistance,and good corrosion resistance,effectively extending the service life of the pipe.
5.The inner wall plasticcoating layer isnon-toxic,tastelessand polution-free,and the health standards meet the safety evaluationstandardsof thenational drinking water transmisionand distribution water equipment and protective materials,ensuringand improving the quality of drinking water.
6.Thefluidesistanceismall,theipewallissooth,thefrionoeicientissall,itisotasytcmlate scale,and it has excellent anti-foreign body adhesion and does not block the water flow.
Mainapplications
Spiralsteelpipeismainlyused intapwaterengineering,thepetrochemicalindustry,thechemicalindustry,thepower industryagriclturaligationurbanconstructiontc.Itienerallysedasapipeforonveyngfluds,uchater drainage,gas,vapor,liquefiedpetroleumgas,steam,naturalgas,sluryetc.Itcanalsobeusedaspipesforpiling usage,as well as pipes for bridges,docks,roads,building structures, etc.
1. Appearance
1.1 The inner and outer surfaces should be smooth,and no bubbles,cracks,peeling,scars,dents,uneven color, or foreign bodies should be allowed.
1.2The surface of the expansion molding socketshould be smooth,without cracks,folds,gapsand otherdefects.
1.3The weld should not have defects such as cracks,brokenarcs,burn-through and arc-pits.The shape of the weld should be uniform, flat and excessively smooth.
1.4No separation and cracking are allowed between the steel pipe and the coating.
1.5The shape of the pipe should be straight,andthe ends should be crew cutor socket.The sectionof both ends of the crew cut pipe should be perpendicular to the pipe axis.
2.Performancerequirements
2.1Guided bending test: Afterthe test,the specimen is notalowed to break completely.No cracksor fractures with a length exceeding 3 . 2 ~ \mathsf {mm } are allowed in the weld metal on the specimen.No cracks in length greater than 3 . 2 \ : {mm } or cracks or ruptures in depth greater than 10 % of the wall thickness are allowed in the base material, heat-affected zone,or fusion line.
2.2 Hydrostatic test: When 0 < 5 0 8 \mathsf {mm } ,the hydrostatic test pressure holding time should be maintained not less than 5s,and when \mathsf { D } >=slant 5 0 8 \mathsf {mm } it should be maintained not less than 10s.There should be no leakage during the test.
2.3Adhesion test: Epoxy coating <=slant grade 3;Polyethylene coating >=slant 30N/cm.
2.4Crushing test (>50mm): No cracks,spalling,and delamination are allowed.
2.5Resistance to external blows:The coating does not flake or break.
2.6 Pinhole test: No sparks are generated.
2.7Hygienic property: Meet the requirements of GB/T17219.
PRODUCTION EQUIPMENT
TEST EQUIPMENT
1.Chemicalanalysisexperimentofrawmaterials
2.German Zwickuniversal material testing machine
3.American ATLAS aging testing machine
4.German Haake rheometer
5.American PE differential scanning calorimeter
6.Shimadzu AA-6800 atomic absorption spectrophotometer
7. Laboratory
PIPING INSTALLATION
Regulations for the installation and use of steel-plasticcomposite steel pipes
1.The piping and connection of the pipeline system should be carried out inaccordance with the following steps:
1.1Draw the actual construction drawing according to the coordinatesand elevation lines specified in the design drawing;
1.2Piping should be carried out according to the measured construction drawing.Establish the instalation sequence of pipesand fittingsand preassemble them.
2.Steel-plasticsteelcomposite pipe should use the following tools:
2.1Special steel pipe cutting machine (DS cutting machine) should be used for cutting;
2.2 Automatic threading machine should be used for threading;
2.3Special roling groove machine should be used for rolling groove;
2.4Pipe bending machine should be used for pipe bending.
3.Threaded connection:
3.1Plastic-coated or lined malleable iron pipe fittings are recommended;
3.2Before connecting the stee-plastic pipe tothefiting,check therubber gasket orsealring in thefiting, then screw the fiting onthe pipe end wire.After confirming thatthe connection of thesteel-plastic pipe has been inserted into the interface of the pipe,connectthe pipe tothe fiting withapipe wrench (Note: Do not rotate reversely).
3.3Steps for threaded connection
① Pipe cutting should meet the following requirements:
Pipes should be cut by a sawing machine, not by an abrasive cuting machine.
When pipes are cut bya sawing machine, it is advisable to use alloy saw blades with a rotation rate ≤8o0r/min, especially for cutting steel pipes.
When pipes are cut by hand saw, the saw surface should be perpendicular to the pipe axis.
② Threading should meet the following requirements:
T Automatic threading machine should be used for threading;
. The threading machine should be lubricated with lubricating oil;
. The taper pipe thread should meet the requirements of the current national standard GB/T73o6 "55°sealed pipe thread" and should be inspected by a standard thread gauge.
③ The cleaning and processing of the pipe end should meet the following requirements:
Therough edge of the metal pipe end should be smoothed with a fine file. Oil,water,and metal chips in pipe ends and threads should be removed with cotton rags and brush.
The plastic-lined pipe should be chamfered with a special reamer, the thickness of the plastic-lined layer should be 1/2,and the chamfer slope should be 10°\~ 15°.
The plastic-coated pipe should be chamfered with a sharpener.
④ Connection:
AfterthepipeendthadiseanedntiorrosionandseaingtreatmentsoudbcaredutItisppropatetoett sealantandpolytetrachloroethyleneTeflontapetowrapthethreadanduseacolorpentomarkthescrewingdepthonthepipewall Tightenthepiefitingsbyand,andtentightenthemwithaipewrenchandppepersaccordingtoable3.Aftertipeis connectedtothefitings,theexposedthreadpartandallcampmarksandsurfacedamagepartsshouldbecoatedwithantirust sealant.
4. Steel-plastic composite pipe grooveconnection
4.1.1The cut surface of the pipe should be smooth,without cracks,bumps,shrinkage,slag,or oxides,and polished smooth.
4.1.2Before groove processing,remove paint,rust,debris,and other dirton the surface of the processing site.
4.1.3Grooves should be formedby cuttng machines,and special roling groove machines canalso be used for processing.
4.1.4During groove processing,the endface of thepipe should be tightwith the stop surface of the processng machine,and the axis of the pipe should be perpendicularto the stop surface of the processing machine. In the process of cutting or rollng grooves,the longitudinal and angular displacement of the pipe should not occur.
1.1.5 Grooves rolled by a cutting machine or rolling machine should meet the following requirements: ① （20 The surface of the pipe end to the groove section should be smooth,without bumps and scratches; ② （20 The groove center should be concentric with the pipe wall,and the width and depth of the groove should conform to thecurrent relevantnational standards; ③ Do not damage the galvanized layerof the pipe and various coatings and lining layer of the inner wall; ④ （204号 When rolling grooves,the outer diameter of grooves must not be greater than the specified value.
4.1.6The grooveconnectionmethodcanbeappliedtotheconnectionof plastic-coated(lined)steelpipe with anominal diameterof not less than50mm.
4.1.7Grooved flexible couplings should comply with the provisions of the national standard "Steel-plastic compound pipes and fittings for fluid service" GB/T28897-2021.
4.1.8The groove connection of plastic-lined (coated) steel composite pipe should be carred out inaccordance with the following procedures: ① The vernier caliper should be used to check whether the groove of the pipe and pipe fitings meet the requirements and whether the model number of the coupling is correct; ② Check whether the rubber gasket matches,apply lubricant on the rubber gasket,and instal the rubber gasket in the middle part of the coupling before connecting,and put it onone side of the pipe end.After positioning,put it on the other side of the pipe end; ③ （204号 The lubricant can be soapy water or detergent, but not grease lubricants; ④ Put the coupling outside the rubber gasket and insert the edge of the coupling into the groove; ⑤ （204号 Pressthecoupling untilthe end face is closed,immediatelytighten the fastener,and evenly tighten the bolts; ⑥ （204号 During the installtion of the coupling,the rubber gasket should be visually checked and should not be wrinkled
PIPE INSTALLATION
Installation guide for flexible and rigid couplings
The outer surface of the pipe from the pipe end to the groove must be clean and smooth, without burrs, depressions, bumps (including welds), peeling paint and rolling indentation, etc. Check before installation to ensure that there are no defects that affect the sealing of the gasket.
Check the gasket to ensure that it is suitable for the working condition. Apply a thin layer of suitable lubricant to the sealing lip and outer surface of the gasket to prevent squeezing the gasket during installation.
Place the gasket in and position it on the pipe end, ensuring that the gasket is not hanging over the end of the pipe.
The two pipe ends are aligned and joined together.
Place the gasket in place, ensuring that it is positioned in the middle between the grooves of the two pipe ends. At the same time,ensure that no part of the gasket extends into any pipe end.
Remove the bolt and nut on one end of the coupling and loosen the nut on the other side. Put a coupling on the gasket, make sure that the two sides of the coupling are stuck in the grooves of the two pipe ends, and then put the other coupling on the gasket. The two sides of the coupling should be stuck in the grooves of the two pipe ends. Then, use your hand to align the two couplings together.
First, manually tighten the nuts, and then use a torque wrench to evenly tighten the nuts at both ends of the pipe clamp to achieve the rated bolt torque and ensure that the oval necks of the two bolts fall fully into the bolt holes.
Check the pipe connection to ensure that bothsides of the coupling are completely stuck into the pipe groove.The gap between the two sides of the coupling should be equal, and no gasket can be seen.
Check the pipe connection to ensure that both sides of the coupling are completely stuck into the pipe groove. There should be no gap on both sides of the joint of the two clamps, and no gasket should be squeezed.
Installation guide forthreadedand grooved mechanical tees
Installation guide for flange connections
1.Pipeend inspection 2. Check and lubricate the gasket 3. Install the gasket
Theoutersurfaceof thepipefromthepipeendtothegrooveCheck thegasket toensurethatitissuitable for the Place the opening face of the gasket in the direction of
must be clean and smooth, without burrs, depressions, working condition. Apply a thin layer of suitable the arrow in the figure, slowly insert and position it at the
bumps (including welds),peling paint and roling indentationubricant to the sealinglipandouter surface of the end of the steel pipe,and ensure that the sealing lipof
etc. Check before installation to ensure that there are no gasket to prevent squeezing the gasket during the gasket is flush with the pipe end.
defects that affect the sealing of the gasket. Installation. 4. Install the flange 5. Tighten the bolts on both sides 6.Connectthematchingflange
Remove the bolts on both sides of the flange, clamp them First use a box wrench to insert the bottom hex of the Align the flange bolt holes with the bolt holes on the flange
into the groovesat the end of the steel pipe with gaskets bolt to prevent the bolt from rotating,and then use a face of the matching valve. Insert the standard flange bolts
installed, insert the bolts on both sides and manually torque wrench to evenly tighten the nuts on both into each bolt hole and evenly tighten the nuts in a diagonal
tighten the nuts. sides in turn to achieve the rated bolt torque. alternating manner until the recommended standard flange connection torque is reached. Complete the installation.
Steel-plastic composite pipe 304 stainless steel
Installation guide for bushing:
4.2 Pipe joints should meet the following requirements:
4.2.1 Whentheflangeisconnected,the gasket should notprotrude into the pipe,anditsouteredge should beclose to the bolt hole.The sealing method of placing double padsoroffset pads should notbeadopted.The diameterand length of the flange bolt should meetthe relevant standards.After the connection is completed,the length of the bolt protruding nut should not be greater than 1/2 of the bolt diameter.
4.2.2 Forthreadedconnection,therootofpipethreadafterpipeconnectionshouldhave2to3exposedthreads,theexcess Teflon tape should be cleaned, and the joints should be treated with anti-corrosion.
4.2.3 For thecoupling (sleeve)typeconnection,the two joints should bematched without gaps,the groove should be uniform,the instalation direction of the coupling (sleeve)should be the same,and the pipe should be straight after clamping the bolts.
4.3 Pipe laying
4.3.1 Holesand slots should bereservedforpipes in concealed laying through wals,foors and wallpanels,and the dimensions of reserved holes or slots shall comply with the following requirements:
4.3.2 The diameter of the reserved holes should be greater than the pipe's outer diameter 5 0 ~ {mm } { ~ } 1 0 0 ~ {mm } ; （20
4.3.3 The depthofthewallgrooveof thepipes inconcealedlayingshouldbetheouterdiameterofthepipeplus20mm\~100mm, and the width should be the outer diameter of the pipe plus 4 0 \ : {mm } ~ 5 0 mm;
4.3.4 Whenthepipe passes throughwallsandfloors,metalorplasticsleevesshouldbeinstalled,andthefolowingrequirements should be met:
4.3.5 Thetopof thecasing instaledinthebathroomandkitchenshouldbe50mmhigherthanthedecorativeground.Thetopof the casing installed on other floors should be 2 0 ~ {mm } higher than the decorative ground, and the bottom of the casing should belevelwiththebotomofthefloor.Thegapbetweenthecasingandthepipeshouldbefiledwithflame-retardantdense material and waterproof paste, and the end face should be smoothed.
4.3.6 Bothendsofthecasinginstaledinthewallshouldbelevelwiththefinish.Thegapbetween thecasingandthepipeshould be filled with flame-retardant dense material, and the end face should be smoothed.
4.3.7 The pipe joint should not be installed in the casing.
4.3.8 The clearance at the top of the overhead pipe should not be less than 200 mm.
4.3.9 Thenetdistancebetweentheconcealedpipeandthewallshouldbedeterminedaccording totheinstalltionrequirements of the pipe support and the fixing requirements of the pipe.
4.3.10 Inthecaseofexposedlang,thipesouldinstalldtertheompletionofcivionstructionBeforeinstalatiock whether the position of the reserved holes is correct.
4.3.11 The pipeinstalationshouldbehorzontalandvertical,witoutobviousfuctuation,bendingandotherphenomenaandthe outer wall of the pipe should not be damaged.
4.3.12 In the case of exposed laying in a row, each pipe should be parallel to the other.
4.3.13Forpipesinexposedlaying,thedistancebetweentheouterwallandthedecorativewallshouldmeetefollowing requirements:
4.3.13.1 When the nominal diameter of the pipe is 1 0 \ : {mm } ~ 2 5 \ : {mm } ,the distance should be less than or equal to 4 0 \ : {mm }
4.3.13.2 When the nominal diameter of the pipe is 3 2mm { ~ } 6 5mm , the distance should be less than or equal to 5 0 ~ {mm } #
4.3.14Noaialedingaddistorionshoudllodntheipeisaidandnooredorretonsouldbellowdit is passed through the wallorfloor.When installed in paralel with otherpipes,tesafetydistanceshould meet the requirementsofthedesign,and whentherearenorequirementsinthedesign,thecleardistanceshouldnotbeless than 1 0 0 ~ { {mm } }
4.3.15 In the case of concealed laying,anti-corrosion measures should be taken for theouter wallof the pipe.
4.3.16 Theacceptance recordsof pressure testand concealed works shouldbe made for the pipesinconcealed laying before sealing the wall.
4.3.17 Whenthepipepassesthroughthebasementortheouterwalloftheundergroundstructure,waterproof measuresshouldbe taken. Flexible waterproof sleeves must be used for buildings with waterproof requirements.
4.3.18 Whenthepipepasses throughtheexpansionjint,seismic joint,andsetlementjointof thestructure,tefollowingprotective measures should be taken:
4.3.19 Flexible connection should be adopted on both sides of the wall;
4.3.20 The upper and lower parts of the pipe or insulation sheath should have a clearance of at least 150 mm.
4.3.21 Atransitionadaptershouldbeusedtoconnectthecompoundpipewiththevave,watermeter,waternozlendother facilities.
4.3.22 The construction of the manifold and distributing pipe should meet the requirements of relevant national standards.
4.3.23 Thepipeand pipe butress (support)should notbe laidon frozensoil oruntreated loosesoil.Aftertheconnectionis completed, the length of the bolt protruding nutshould not be greater than 1/2 of the bolt diameter.
4.3.24 Forthreadedconnection,therootofpipethreadafterpipeconnectionshouldhave2to3exposedthreads,theexcess Teflon tape should be cleaned, and the joints should be treated with anti-corrosion.
4.3.25 Forthecoupling (sleeve)typeconnection,thetwojointsshouldbematchedwithoutgaps,thegrooveshouldbeuniform,the installtiondirectionof thecoupling (sleeve)shouldbe thesame,and thepipeshouldbestraightafterclamping the bolts.
4.4. Installation of supports and hangers
5.PipeTest,Flushingand Disinfection
6.QualityAcceptance
1.Carriertemperature
Thecarrier temperatureof steel-plastic composite pipe for water supplycan be divided into room temperature and hotwater. (See Figure 1)
2. Cutting
Whencutting steel-plasticpipes,a water-solublecoolant andaspecial steel pipecuting machine (DS cutting machine)should beused instead of a high-speed grinding wheel cuting machine soas not todamage the end face of the steel-plastic pipe.In addition,gas cuttersand electric welding cuters should not be used.
3. Corrosion
The zinconthesurface of steel-plastic steelcomposite pipeand galvanized pipe isarelatively activeamphoteric element.Thezincthat actson the positive protectionof the steel matrixunder certain conditions (neutral and reasonableenvironment)willreact withacid,alkali，andsalt,whichwillead tocorrosionand perforationof galvanized steel pipeinseriouscases.We recommend that for the steel-plasticcomposite pipe and galvanized pipe installed in the wallorunderground (kitchenand toilet room),thesurfaceof the pipe should be treated (such asapplyinga layer of epoxy paint orasphalt paint,etc.）to isolatethedirect contactbetweenacidand base elementsand the zinc layer toensure the role of galvanized pipe ina neutral environment. (See Figure 2)
4.Transportation
Thereshould beno throwingand violent impact during transportation,and nylonbelts should beused forlifting during loading and unloading. (See Figure 3)
5. Storage
Quaified steel-plasticcomposite steel pipes should be stored inan indoor room-temperature environment and mustbecovered when stored in theopenair.It should notbe storedoutdoors indirectsunlightandcold places foralongtime.Theproductshould notbe keptdirectlyonthe groundwhilebeingstored;instead,itshouldbe supportedbya shelf.The product should notbe in contact withacid,alkali,salt,orotheritems.(See Figure 4)
HONORARY CERTIFICATES
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