LESSO

Structured Wall Plastic Pipe and Fittings Spirally Enwound Structure-wall Pipe

LESSO

ABOUTLESSOGROUP

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, building materials 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-proofing materials and sealants, fire-fighting equipment, valves, cables,lighting, hygiene materials, items for environmental protection, agricultural facilities, and oceanic aquaculture cages. In 2023, LESSO'ssalesrevenuereachedoverUSD4.38billion.

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 bases worldwide,broadening its industrial 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.

LESSO has founded its R&D center with more than 1,0o0 scientific researchers, nationally accredited enterprise technology center, and two post-doctoral workstations to support its innovation and technical development. The Group has taken a leading role in the revision of over 120 international and Chinese industry standards. LESSO owns over 30o0 patents (some of them are pending),and provides over 10,0o0 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, energy management,power supply and telecommunications, gas supply,fire-fighting,environmental protection,agriculture,oceanic aquaculture,etc.

True to its idea of “Envisioning the Better, Building the Future", LESSO remains committed to creating a better living environment, and advocating ideal cities featuring greenness, livability, and efficiency. With concerted efforts from various sectors, LESsO wil fully play its role insustaininghealthy andbeautiful space so that global residentscould enjoy a comfortable life.

Contents

Structured Wall Plastic Pipe and Fittings

HDPE Corrugated Pipe and Fittings 01-04 HDPE Drainage Pipe 05 HDPE Spiral Enhanced Pipe and Fittings 06-10 Metal Reinforced PE Spiral Corrugated Pipe andAccessories.. 11-12 PVC-U Double-Wall Corrugated Pipe andFittings 13-16 SpirallyEnwoundStructure-wallPipe 17-22 Certifications· 23-24

HDPE Double-Wall Corrugated Pipe

⊚ Material:HighDensityPolyethylene ⊚ Size: 1 10\mathsf{mm} to 800mm ⊚ RingStiffness:SN4 and SN8 ⊚ Color:black or other colors upon request

@Standard:BSEN13476-2:2007、BSEN13476-3:2007+A1:2009, GB/T19472-1
@Application:municipal sewage,rainwater discharge, floodwaters drainage,irrigation,ventilationformine and buildings, industrial waste discharge

HDPE Double-Wall Corrugated Pipe (Plain End)

HDPE Double-Wall Corrugated Pipe (Socket End)

Note:SN isNominal RingStiffness,which reflects the abilityof a pipe toresist deformation duetoan external load. Stiffness classes are identified by anSN number where a higher numberindicates greater resistance to deflection.

HDPE Double-wall Corrugated Holing Pipe

Length:8m or other length upon request

SPIRALENHANCEDPIPEPEA

⊚ Material:High DensityPolyethylene
⊚ Size: 200mm to 2400mm
⊚ Ring Stiffness: SN4, SN8 and SN12.5
⊚ Color:black or other colors upon request.
⊚ Length:6m,11.8m or other length upon request.
⊚ Standard:BS EN13476-2:2007、BS EN13476-3:2007+A1:2009, GB/T19472-1

Application:municipal sewage,rainwater discharge,floodwaters drainage, irrigation, ventilation for mine and buildings, industrial waste discharge and communicationprotecting.

@ Specification 520 is non-standard product.

Metal Reinforced PE Spiral Corrugated Pipe

⊚ Material:High Density Polyethylene ⊚ Size: 500mm to 2400mm ⊚ Ring Stiffness: SN8, SN12.5 and SN16 ⊚ Color: black or other colors upon request ⊚ Length:6m or otherlength upon request ⊚ Application: municipal sewage, rainwater discharge, floodwaters drainage,irrigation,industrial waste discharge

PVC-U Double-Wall Corrugated Pipe (Socket End)

⊚ Material: Unplasticized Ploy (Vinyl Chloride) ⊚ Size: 63\mathsf{mm} to 1000mm ⊚ Ring Stiffness:SN4 and SN8 ⊚ Color: cream or other colors upon request ⊚ Standard:ISO 21138-2,ISO21138-3,GB/T18477-1 ⊚ Application:municipal sewage,rainwaterdischarge,floodwaters drainage,irrigation,ventilationformine and buildings,industrial wastedischargeandcommunicationprotecting

PVC-U Double-Wall Corrugated Pipe -- Infiltration Pipe

Slotting regulation for PVC-U double-wall corrugated pipe--half infiltration pipe:

1.Slottingfor onerow;
2. Slotting for two rows in 1/3circle(Slotting in a trough between rows);
3. Slotting for three rows in 2/5circle(Slotting in triangle);
4.Slotting for four rows in1/2circle(Slotting in triangle);
5. Slotting for five rows in 2/3circle(Slotting in triangle);
6. Slotting for six rows in 3/4circle(Slotting in triangle).

llustration: \Phi1 10 groove width is 1.0\mathsf{mm} Φ160 groove width is 1.2\mathsf{mm} \Phi200 groove width is 1.5\mathsf{mm}; the length of thegrooveisunited as 40\mathsf{mm}, thetoleranceisaround ±3\mathsf{mm}, specific dimensions can be produced upon request.

Product Introduction:

LESSO Spirally Enwound Structure-wall Pipe PE B(Krah Pipe),The PP is used as the auxiliary support structure, the PE as the inner layer material is made by spirally enwound forming technology, the inner wallis smooth, the outer wall of pipe is circular hollow spiral rib, which belongs to flexible pipe.

Product implementation national standard GB/T 19472.2-2017<Polyethylene structure-wall piping systems for underground usage — Part2: Polyethylene spirally enwound structure-wall pipes>.The construction and acceptance compliance (CECS164: 2004)<Technical Specification for buried PE pipeline of sewer engineering>.

High density polyethylene is used as raw material, light weight, good chemical stability, corrosion resistance, aging resistance,long life, goodflexibility and strong impact resistance.The service lifecan reach 50years.

The product has been widely used in municipal, electric power, petrochemical, wharf, airport, industrial and mining enterprises and other fields of drainage sewage system, is a reinforced concrete pipe and cast iron pipe and other traditional drainage sewage pipe ideal replacement products.

As a mature product, high density polyethylene (HDPE) structure-wall pipe has been widely used in foreign countries, and has also been rated asakeypromotionproductbytheMinistry ofDevelopment inChina.

Product Characteristics and Advantages:

1. The connection quality of pipe interface is high, and the connection mode of zeroleakage pipe can be realized by socket type electro fusion connection, and the interface is the samematerial socket fusion connection. Itisconvenientandquicktorealizezeroleakageinpipeline system.

2. High nominal ring stiffness, and strong match for engineering

According to different engineering conditionsand computer calculation software,the nominalring stiffness of pipe can reach 20{\mathsf{k N}}/{\mathsf{m}}^{2} Thebestpipeproducts andfittingssuitablefor engineeringconditionscanbeselected.

3. Wide product diameter range.

HDPE pipe can be produced in the current pipe diameter range of DN200-DN3000,pipe standard length of 6000\;mm, canproducemorethan 1000\;mm, Anylengthofpipebelow 6000\;mm

4. Good stability of piping system

The circularexternal ribstructure not only increases the nominal ring stiffness of the pipe,but also has root resistance,which solves the problem of longitudinal displacement of the pipe.And the pipe itself is flexible,can achieve sidewelding while backfilling construction.

Applications:

municipal water supply and drainage,largescalewater conservancyprojects,petroleumindustry,coal industry, chemical engineering, environmental protection engineering, electric power engineering,etc.

Physical Performance Indicators:

Pipe Specifications:

1.The products according to GB/T 19472.2-2017Type B Structure-wall pipe standards for production;
2.The grade of our company products mainly produces nominal ring stiffness is SN4/6.3/8/10/12.5,
SN16andhighergrade arealsoavailableuponrequest;
3.The product coloris generallyblack,can alsobe agreed between the supply and demand parties;
4.Thepipelengthisgenerally 6\;\mathsf{m}, can alsobeagreed between thesupply and demand parties;
5.Thispagewonthe "\star" product mold has notbeen improved,please note.

Product Introduction:

LESSO Spirally Enwound Structure-wall Pipe PE B(D)(Slotted Krah pipe) takes PP pipe as auxiliary supporting structure, PE as inner layer material, it is made by hot spirally enwound forming technology, and the inner wall is smooth.The outer wall is a circular hollow spiral rib pipe,which belongs to flexible pipe.The characteristic of the product is that there is no copper wire at the socket, the cutting slot at the socket is used to place the sealing ring, and the connection mode is the socket interface connected by the double elastic seal rubbering.

Product implementation national standard GB/T 19472.2-2017<Polyethylene structure-wall piping systems for underground usage—Part2:Polyethylene spirally enwound structure-wall pipes>.The design and selection based on German static force calculation standard ATV127, The construction and acceptance compliance (CECS164:2004)<Technical Specification for buried PE pipeline of sewerengineering>.

High density polyethylene is used as raw material, light weight, good chemical stability, corrosion resistance,aging resistance, long life, good flexibility and strong impact resistance.

The product has been widely used in municipal, electric power, petrochemical, wharf, airport, industrial and mining enterprises and other fields of drainage sewage system, is a reinforced concrete pipe and cast iron pipe and other traditional drainage sewage pipe idealreplacementproducts.

As a mature product, high density polyethylene (HDPE) structure-wall pipe has been widely used in foreign countries, and has also beenrated as akeypromotionproduct bytheMinistry of Development inChina.

Product Characteristics and Advantages:

1.The pipe is used double elasticity seal rubber ring connection,the sealing performance is superior. The pipe connection adopts double elasticity sealing rubberring connection socket joint,high sealing.

2.Reliablepipeconnection,long life,simple andfast. The connection mode of pipe is reliable and firm,the service life of sealing ring is long,and the operation is simple and fast.

3.The pipe is formed by hot spirally enwound forming, high weld strength and no internal stress. Compared with the spirally enwound pipe and the metal reinforced pipe,the krah pipe is air-cooled formed, without internal stress, shaped by the inner wall mould, smooth inner surface and low fluid resistance coefficient.

. High nominal ring stiffness, and strong match for engineering.

According to different engineering conditions and computercalculation software,the nominal ring stiffness of pipe canreach 20{\mathsf{k N}}/{\mathsf{m}}2 The best pipe products and fittings suitable for engineering conditions can be selected.

Applications:

Applications:municipalwatersupplyanddrainage,large-scalewaterconservancyprojects,petroleumindustry,coalindustry,chemicalengineering environmental protectionengineering,electricpowerengineering,etc.

Physical Performance Indicators:

Pipe Specifications:

1.The products according to GB/T19472.2-2017TypeBStructure-wallpipe standardsforproduction;
2.The grade of our company products mainly produces nominal ring stiffness is SN4/6.3/8/10/12.5. SN1t
andhighergradearealsoavailableuponrequest;
3.Theproduct colorisgenerallyblack,can alsobe agreedbetweenthe supply and demand parties;
4.Thepipelength isgenerally 6\;\mathsf{m}, can also be agreed between the supply and demand parties;

Product Introduction:

LESSO Spirally Enwound Structure-wall Pipe PE C (T)(flexible krah pipe), the socket is first molded, then the injection pipe is fastened into the steel mould, then the PP pipe is used as the auxiliary support structure.PE as the inner layer material is made by the process of spirally enwound forming pipe body.smooth inner wall and the outer wallis circular hollow spiral rib.which belongs to flexible pipe. Thesocket adoptsdoublesealing ring connection

ProductimplementationnationalstandardGB/T19472.2-2017<Polyethylene structure-wallpipingsystemsforunderground usage—Part2:Polyethylene spirally enwound structure-wall pipes>.The construction and acceptance compliance(CECS164:2004) < TechnicalSpecificationforburiedPEpipeline ofsewerengineering>.

High density polyethylene resin (HDPE) is a kind of environmental protection and safetyproduct.It has the advantages of light weight,strong bearing capacity,highjoint quality,long life,corrosionresistance,highring stiffness and convenient construction.lt's currently buried sewage,drainage of the preferred pipe.

Product characteristics and advantages:

1. The connection of pipe joint is convenient and can be connected directly with injection inspection chamber.
Flexiblesealing ring connection, easy installation,high construction eficiencycan adapt to theinstalltion of rain water environment;
socket injection molding, good interchangeability, direct insertion, no electric heating equipment, save installation costs;
Can be directly connected with the injection inspection chamber produced by the company.

2. High nominal ring stiffness, and strong match for engineering

According to different engineering conditions,the nominal ring stiffness of pipe canreach 20k\mathsf{N}/\mathsf{m}^{2} thebestpipesuitablefor engineering conditions and complete inspection chamberfittingscanbe selected.

3. Wide product diameter range, flexible joint

The pipe can be produced in the DN300-DN1400 of the national standard, the normal effective length of the pipe is 6 meters, and the pipe can be produced within 3-6 meters; The two ends of the pipe can be socketed or double spigot.

Physical Performance Indicators:

Pipe Specifications:

1. The grade of our company products mainly produces nominal ring stiffness is SN4/6.3/8/10/12.5.SN16 andhighergradearealsoavailableuponrequest;
2.The productcoloris generally black,lengthisgenerally6m,canalsobeagreed betweenthesupply and demand parties;
3.Thispagewonthe \mathbf{\ddot{\mu}}\star\mathbf{\ddot{\sigma}} productmoldhas notbeenimproved,pleasenote.

BV certificationfor structured-wall piping systemsPVC-U,HDPEpipes and fittings cOmply with BS EN 13476-2, ISO 21138-2, BS EN 13476-3, ISO 21138-3.

CEcertificationforstructured-wall plasticpipesandfittings cOmply with EN 13476-1, EN 13476-2, EN 13476-3, ISO 21138-1, ISO 21138-2, ISO 21138-3.

LESSO

CHINALESSOGROUPHOLDINGSLIMITED

(STOCK CODE: 2128.HK)