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DONGHENG
SEAL
宁波东恒密封件有限公司开发生产各类密封材料及制品，本厂生产各类密封件如金属缠绕垫、四氟
乙烯垫片、石墨复合垫片、盘根，目前在密封领域拥领先的技术产品被广泛的应用在机械、化工、冶金、
电力，船舶、食品、航空航天、医药、电子等工业领域。本公司不仅在国内拥有众多的客户，而且产品还
远销海外。
随着国内外市场需求量的不断增加，我们将在提高质量、增加品种的前提下，进一步扩大规模。我
们将依托我们优质的产品，雄厚的技术力量,良好的售后服务，同广大用户建立良好的合作关系。
Ningbo Dongheng Sealing Co.,LTD develop and produce all kinds of sealing materials and products,
our factory produce all kinds of seals, such as Spiral wound gasket, PTFE gasket, Reinforced graphite
gasket and Gland Packing. Currently in a sealed area of advanced technology products are widely used in
mechanical, chemical, metallurgy, electric power, shipping, food, aerospace, medicine, electronics and
other industries. The company not only has a large number of customers in China, but products are also
exported to overseas.
With the increasing demand for domestic and international markets, we will improve quality, increase
product variety, under the premise of further expansion. We will rely on our quality products, strong
technical force, excellent after sales service, with the majority of users to establish good relations of
cooperation.
芳纶
RPTFE GASKET
RING
PTFE GASKET
METAL DOUBLE JACKETED GASKET
膨胀石墨卷材板材
EXPANDED GRAPHITE ROLLS & SHEET
增强石墨复合板
石墨波纹带(不背胶)石墨波纹带(背胶)
EXPANDED GRAPHITE CORRUGATED TAPE
石墨编织带石墨编织布
EXPANDED GRAPHITE WEAVEN TAPE
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
27
尺寸表格 28
类型/材质 TYPE & MATERIAL
产品介绍：金属缠绕垫片由V形或W形不锈钢带和非金属填充料叠合，螺旋卷绕，始末端点焊而成。具有良好的压缩弹性，适用于温
度、压力交变剧烈的密封部位，是管道、阀门、泵、换热器、塔、人孔、手孔等法兰连接处的静密封元件。广泛应用于石化、机械、
电力、冶金、造船、医药、原子能和宇航等部门。
Description: Spiral wound gasket is formed by the V-shaped or W-shaped stainless steel belt and non-metalic filer
through lamination, spiral winding, and spot welding of the tops and ends, with good compression elasticity, it is applicable
to the sealing parts under the intense alternating temperature and pressure, as the static sealing elements at the flange
joints of pipelines, valves, pumps, heat exchanger, towers, manholes, handholes, etc. Its widely used in petrochemical,
machinery, electric power metallurgy, shipbuilding, medicine, atomic energy, aerospace and other fields.
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
产品介绍：石墨金属复合密封垫片由纯石墨板或高强石复合板材冲好的压缩回弹性，较好的强度，是管、阀、泵、压力容器、换热器、
冷凝器等密封元件。高强石墨金属复合密封垫片还可切成复杂的密封垫片，即保持原有垫片的各项优异性能，又便于安装、拆卸，不
易损坏，同时也可防止介质对垫片的侵蚀，提高了耐压。常用包边材料为304或316不锈钢。
高强度石墨金属复合密封垫片常用厚度:1.5mm，2.0mm，3.0mm，4.5mm。
304/316
0.05mm foil
0.25mm Carbon
Steel
0.1mm 304/316
Description: Reinforced graphite gasket is cut from pure graphite sheel or graphite sheet with metal reinforcement.
Features excellent corrosion-resitstance,high-and-low temperature resistance, good compression resilient and
high intensity can be used as sealing elements of pipe, valve, pump, pressure vessel, heat exchanger and
condenser, etc Other complex gaskets such as water gauge gasket and flange with bolt holes are available.
Metal Eyeleted Flat Gasket lE-Reiforced with Gasket with inner Eyelet IO-Reinf-orced gaskets, it remains
properties of cut gaskets, the natal eyelet. The metal eletmaterial is normally ss304 or 316, pressure 6.4-10Mpa
Style of cut gasket ;G+cOde of gasket sheet IO-Tanged metal reinforced graphite gasket with inner & outer eyelets
IE-Metal foil reinforced graphite gasket with inner eyelet.
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
Description: Metal jacketed gasket is made from graphite ceramic, non-asbestos etc. filler covered with thin metal
jacket, such as stainless steel ,soft iron, carbon steel, copper etc. By their sealing efficiently, provide outstanding
resilience, while the metal jacket guarantees excellent sealing and protects the filler against pressure conditions
fluctuating temperatures and corrosion. Metal Jacketed Gasket is particularly suitable for sealing flat surfaces of heat
exchanges, gas pipes ,cast iron flanges , cylinder heads of engines as well as for boilers and other vessels. By their
sealing efficiently, provided by exerting strong pressure on circular rimes of the flanges, metal-jacketed gaskets can
stand up to 30% deviation from the initial thickness, which is very useful in case of irregular or faulty flange rims. The
chemical compatibility of the metal and the medium being sealed should be considered
DOUBLE
金属齿形垫产品类型
Kammprofile Gasket Type
产品形式Gasket Type 适用的法兰密封面Flange Face 厚度Thickness（mm)
本体Steel Core 复合层(单面) Soft Material（Single）
3，4，5
3，4，5
3，4，5
榫槽面、凹凸面、平面 TG、MFM
平面或凸面 FF、RF
平面或凸面 FF、RF
基本型 Basic Type
带外环 Outer Ring Type
带活动环 Loose Outer Ring Type
金属齿形垫非金属材料主要参数
Kammprofile Soft Material
回弹率
Recovery%
>17
>15
>25
>19
压缩率
Compressibility%
最大工作压力
Max Pressure
温度
Temperature℃
-220 ~ 550
-100 ~ 200
-100 ~ 260
-200 ~ 1090
250BAR
100BAR
200BAR
100BAR
18~30
18~30
25~35
18~40
产品标识
Code
材料
Material
膨胀石墨Graphite
聚四氟乙稀PTFE
膨体四氟EPTFE
陶瓷纤维Ceramic
金属齿形垫金属材料
Kammprofile Metal Material
材料Material
碳钢 Carbon Steel
SS304
SS316L
SS321
缩写标记Code
CRS
304
316L
321
硬度HB
120
130-180
130-180
130-190
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
极限温度
Limit temperature℃
硬度HB
Hardness
缩写标记
Code
材料名称
Material name
回弹率%
Resilience
适用介质
Applicable medium
温度
Temperature℃
材料
Material
标志代号
Code
最大工作压力
Max Pressure
压缩率%
Compressibility
应力松弛率%
Stress relaxation
金属波纹复合垫片各种非金属材料主要技术参数
Metal corrugated composite gasket various non-metallic materials main technical parameters
下表用于对常用金属波纹复合垫片金属骨架的材质选择
The following table is used to select the material of the metal skeleton of
the common metal corrugated composite gasket
产品介绍：用金属蒲板压制成同心的波纹形状,由纹提供机械支撑,其回弹性能根
据采用的形式、金属厚度、波纹间距及波纹高度来决定。再根据需要加贴软质
密封层材料,使其具有更好的压缩回弹性能,可选择柔性石墨PTFE、无石棉板或
其它一些软金属,粘贴在垫片的二面,利用软性覆盖层的密封性以及金属的强度、
弹性好的优点,以达到更好的密封效果。
性能特点：
Description: corrugated metal gasket are used by 0.5mm, 1.0mm,2.0mm, etc metal sheets, by pressing, turning,
rolling and other metal production processes into thin gasket, the surface equidistant concentric circular wave,
according reference standards, paste the surface or lining materials are Graphite, PTFE, non-metallic materials
etc.
Application of Kamprofile Gasket: corrugated metal gasket in the flange and the exchanger of large-size
device is widely used Particularly in the smoke, gas, low pressure, high temperature and distorting the flange
uneven conditions, the application better.
产品介绍：
石棉橡胶垫片:选用优质石棉纤维、橡胶及其它化工原料经特殊配合
后采用辊压法压制而成。根据客户要求可夹带金属丝。
耐油石棉橡胶垫片:采用优质石棉纤维、耐油橡胶及其它化工原料经
特殊配合后采用辊压法压制而成。根据客户要求可夹带金属丝应用
介质:主要使用于介质为各种油类、水、水蒸气、一般气体等。
Description: Asbestos gasket for low pressure,
manufactured from long fiber white chrysotile asbestos. it
has been designed to meet most low temperature and low
pressure requirement. suitable for sealing against steam,
gas, gases, hydraulics, oil and non-aggressive media.
产品介绍：无石棉橡胶垫片是一种性能优异的垫片。采用芳
纶纤维、耐温合成矿物纤维、耐油 胶等采用辊压法压制而
成，具有耐温，耐压，耐油、优良的气密性、和压缩回弹性
等性能,经测试是完全可以替代进口的一种无石棉材料。根
据客户要求也可夹带金属丝，是100%不含石棉的优质环保
材料，已大量出口欧美等多个国家和地区。广泛应用于管道
法兰、阀门、热交换器、压力容器、机械设备、发动机等工
业设备。
应用介质：各种气体、水、水蒸气、化学溶剂及各种油类等。
Description: Non-asbestos gasket is a sealing material made by adding special adhesives and a little packing
into it, then roll and sulfurated. It is a replacement of asbestos gasket Non-asbestos Gasket has better strength
elasticity and supper strong anti-penetrate performance, And it is product with environment protection material.
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
Item
Material
产品介绍：纯四氟垫片又叫PTFE整片或Teflon(铁氟龙)垫
片由聚四氟乙送棒、管、板经机械车刚或切而成的平整
片、V形垫片、活塞环、球整图等。具有耐使、抗老化和不
导 电 等 良 好 特 性 。 纯 四 乙 送 整 片 是 一 种 洁 净 的 密 封 产
品，不会对其所接触的任何物质形成污染，广乏应用于各
种强酸、强碱、强氧化、氯气和不允污染介质的密封。
Description: PTFE gasket is made by cutting PTFE stick, pipe and sheet into flat shape, v shape gasket or valve
annulus. t has 100 PTFE structure. lt can bear the most bitter chemical medium, and has good anti-creeping.
产品介绍：最基本应用范围最广的垫片，它以聚合物加以硫化，添加填料、颜料
及各种添加剂构成合成橡胶，具有相当优异的压缩性和回弹性，只需要很底的预
紧力就能在低温低压的工况下发挥有效的密封作用，易拆装并对不平整密封面也
可达到良好的密封效果，由于橡胶具有优秀的扩展性和抗渗透性对于抵抗气体及
流体的通过形成非常有效的密封。
Description: Rubber gasket is cut from NBR, SBR, CR, EPDM. Some
rubber gasket have resistance of oil, Some rubber gasket is used in
cold fever, Some rubber gasket has anti-aging properties There are
various shapes of rubber gasket.
产品介绍：膨体聚四氟乙烯垫片是由100%PTFE的膨体聚四氟乙烯
材料切割或冲压而成，膨体四氟材料(eptfe)它是将聚四氟乙烯膨化
成为一种具有强初而多孔性的独特材料，它高度纤维化，这种材料
不但保持了聚四氟乙烯本身独特的性能——极佳的化学稳定性(不受
一般化学品的影响)：极低的摩擦系数；较广阔的操作温度；不会老
化永久耐用；现在它多纤维的结构使其作为密封产品具有超乎想象
的坚初性,更重要的是他从根本上解 了其它类型四氟密封材料的通
病一蠕变和冷流，与纯四氟垫片和填充四氟垫片相比性能大为改
善，另外，易于切割，便于安装，使用寿命长等特性使它能在几乎
所有的密封场合中得到实际应用。这无疑是项了不起的革命。
Description: Expanded PTFE Gaskets and Seal materials consist of PTFE with multitier films and/or porous
structure, which the extruded PTFE consists of A special manufacturing process provides the material with
special chemical and physical properties Application of Kamprofile Gasket: Expanded PTFE gasket is
designed for use in process piping and equipment in chemical, pulp and paper, food and beverage and other
general industrial applications where resistance to highly aggressive chemicals is required.
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
材料 Material 特性改进 Characteristic improvement
产品介绍：纯四氟整片中均匀加入玻璃纤维、碳纤维、石墨粉等填充材
料。与纯四氟相比，它具有更好的抗变,抗冷流,耐磨损,较好的热传导，低
热膨胀等。性能不同的改性四氟垫片能满足各种不同的需要,结合四氟本身
的特点，更加加宽了其应用领域。
Description: If add some fibreglass, graphite, bronze to improve the character of pure PTFE, the compression
resistance and high temperature resistance of modified PTFE gaskets are more perfect. We have PTFE gasket
reinforced with glass fibre, graphite PTFE gasket, PTFE bronze gasket, ect.
产品介绍：四氟橡胶复合垫片，是采用高级EPDM三元乙丙橡胶或NBR丁腈橡
胶为主体，在其有效密封部位复合经特殊活化处理的100%纯PTFE外壳而
成。产品减少了垫片冷流,增加了垫片的抗吹出性，使垫片具有良好刚性强度及
压缩、回弹补偿性，能满足较高压力及工况比较苛刻场合。
Description: PTFE with rubber gasket is made from EPDM and NBR as the main
body in the effective sealing parts of the composite with a special activation
treatment of pure PTFE shell.
1.Repeatable use
2.Raised the sealing ring, not only has a multi-channel labyrinth sealing effect, but
also greatly reduced the gasket and flange sealing contact surface, can maintain a
higher seal than the pressure, thereby reducing the 75 percent to achieve the seal
and the bolt on the external torque load.
3.Pure PTFE sealing surface, provides a clean non polluting sealing surface, but with good chemical resistance.
4.Unique composite process, the PTFE firmly glued to the rubber elastomer, preventing the delamination and leakage.
产品介绍：专业设备加工而成的聚四氟乙烯包复弹性芯材制作而成。主要用作强酸、卤素等腐蚀性强的液体或忌污染的食品、医药等法
兰、塔槽、各种机器设备等的密封垫片。具有优异的抗腐蚀性，适用于绝大多数化学品尤其使用于毒性、强碱及强腐蚀性的介质。(除熔碱
金属和高温氟化物)广泛应用于化学、石化、制药及食品等工业。
Description: The PTFE warping flexible core material by processing with professional equipments. It is mostly use on the sealing gasket
of the flange, pagoda groove and all kinds of the machinery equipment that it is also use on the strong acid, halogen or no contaminative
food stuff, medicine. lt has outstanding function of enduring in the corrosion. And it apply to the over whelming majority chemical
material. Especially, the toxicity, strong acid, strong alkalescence and corrosion medium.) Execept the fusing alkalescence, high
temperature fluoride. lt is application of PTFE envelope gasket to petroleum, chemistry, pharmacy and food stuff industry.
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
产品介绍：模压石墨由低硫膨胀石墨带经卷绕、模压而成，只寸精确，密度可定，且无任何外加填充剂或粘接剂。一般，截面为方形，也
可以禊形式V形，后二种适用高压部位。增强石墨填料环膨胀石墨填料环，内衬不锈钢箔、网等，可提高搞压能力。缓蚀型石墨填料环应
用：具有膨胀石墨的各项特性，能经受剧烈交变的温度和压力，是阀门和各种静密封的理想填料。除了阀杆被严重损坏时避免使用外，它
既可单独使用，也可与高碳纤维盘根端环组使用，可防填料挤出。
Description: Graphite Ring Made of pure graphite without any fillers or binders. They are compressed in precise molding tools to the
required density. The V-shaped and wedge-shaped sections are suitable for high pressure sealing Reinforced die-formed Graphite
Ring with Corrosion inhibitor application: lt can bear violent alteration of temperature and pressure lt is ideal packing for valves and static
seal in almost all applications can be used without anti-extusion devices, except when stemsare severely damaged, is suitable for high
temperature, high pressure, high PV
产品介绍：聚四氟乙烯板材由100%的纯聚四氟乙烯经模压、车
削、裁切等各种工艺精制而成，在已知的塑料中它具有最好的
耐化学腐蚀性能，不老化，电绝缘，并具有极低的磨擦系数，
在无负荷的情况下，能在-180~+260度的温度下使用。
用途：平垫、V型垫、衬材等密封材料，活塞环、导轨等润滑材
料，电绝缘材料，防粘材料等。
Description: PTFE molded sheet is manufactured by molding
method with PTFE granular resin PTFE is the most chemicalresistant plastic of all known plastics. lt does not age. lt has the
lowest coefficient of friction of all known solid materials and a
wide range of practicable temperature from-180℃~+260℃.
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
产品介绍：是由100%PTPE聚四氟乙烯经过特殊工艺处理研
制而成具有优良的柔韧性，有极佳的顺应性能及成型能力，
又具有高抗拉强度，抗蠕变、耐高低温、耐腐蚀、抗冷流、
抗老化。可长期存放不变质，无毒无污染，并由无数均质细
密柔软强韧的多方向纤维组成，具独有的高密度纤维组成，
受压后纤维会相互缠结，变成组织更紧密均匀，不透气，不
透水、止泄性能良好，在严苛之腐蚀性环境及高温下，亦能
保持极佳之密合状态。
应用范围：适用于生物制药、食品、化工、炼油、军事、船
舶、航天、机械等高密封，高腐蚀环境。热交换器。FRP，压
缩机架法兰，蒸汽容器法兰，液体及气体系统水系统，通风
扇架等施工场所。
Description: Expanded PTFE sheet is a universal sheet gasket material for most services. seals rough and irregular surfaces, Made
rom biaxial oriented expanded PTFE sheeting that is laminated to the required thickness. Our EPTFE gasket sheet is manufactured by
expanding 100% virgin PTFE using fibrillated microstructure with equal tensile strength in all directions. The resulting product exhibits
characteristics significantly different than conventional PTFE sheet. EPTFE is much softer and more flexible than regular PTFE sheet
and thus conforms easily to irregular and rough surfaces, in addition, the material is easier to compress and minimized creep and cold
flow, Application of Kamprofile Gasket:. Expanded PTFE sheet is an all purpose gasket sheet that can replace all the other types of
PTFE sheet. it will seal all aggressive chemicals over the entire0-14 PH range except for molten alkali metals and elemental fluorine.
Made from 100% virgin PTFE, our EPTFE not only resists chemical ack, but it will not contaminate or discolor end products.
产品介绍：无石棉板是我公司在引进外国先进的生产工艺的基础上打
造的一种性能优异的无石棉材料。采用芳纶纤维、耐高温合成矿物
纤维、耐油橡胶等材料用辊压法特制而成，具有耐温，耐压，耐
油、优良的气密性、和压缩回弹性等性能，经测试是完全可以替代
进口的一种无石棉材料。是100%不含石棉的优质环保材料，已大量
出口欧美等多个国家和地区。根据客户要求也可夹带金属丝，或涂
石墨。无石棉板应用介质:各种气体、水、水蒸气、化学溶剂及各种
油类等行业设备:产品广泛应用于发电、冶金、船舶、石油化工等工
业应用中水、汽、油等介质的密封管道法兰、阀门、热交换器、压
力容器、机械设备和发动机、压缩机、内燃机、机械、仪表、供暖
等工业设备。同时我公司代理以下进口无石棉板材：KLINGER(澳大
利 亚 )、 BELPA(西 班 牙 )、 FRENZELIT(德 国 )、 VALQUA(日 本 )、
DURABLA(加拿大)、NOVUS(英国)、TESNIT(欧洲)
Description: Non-asbestos sheet is a sealing material made by adding special adhesives and a little packing to it then roll and
sulfureted. it is a replacement of asbestos gasket. Non- asbestos gasket has better strength, elasticity and supper strong antipenetrate performance. And it is product with environment protection material.
Non-asbestos sheet is suitable to produce various kinds of gaskets for commercial equipments, such as Pipe flange, valve, heating
exchanger, pressure vessels, mechanical equipments, engines.,etc.
There is 0% sepiolite element in the composition.
Application of Medium: All kinds of gas, water, vapour, chemical solvent, and all kinds of oils.
无石棉板的主要性能特点：
1.100%不含石棉，新型环保材料，可出口欧美等主要发达国家地区
2.良好的耐温、耐压性能以及压缩回弹性
3.广泛的适用性、耐油性、耐介质性和气密性
4.较高的机械强度材料易切割成型
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
产品介绍：由特殊工艺加工而成的纯聚四氟乙烯制品，具有很好
的柔韧性、压缩回弹性、耐变性、耐高低温性及优异的耐腐蚀
性、不老化性、自润滑性。密封性能卓越,自粘性背胶,安装使用
极为方便，是化工、医药、石化、食品饮料、电子、电力、冶
金、船舶等行业极理想的密封材料。
Description: Expanded PTFE joint sealant is made from 100%
pure PTFE. lt has excellent anti-acid &anti-alkalis And welldone tensile strength recovery. Especially, used in food, drink,
chemical etc, unneeded to make gasket, it can be installed
easily.
&
Description: Graphite sheet is selected from the high purity natural
flake graphite. They are made through the advanced chemical
treatment and mechanical procedure without fibers, binders or other
additives. It offer excellent sealing capabilities under extreme
conditions with a longer life and less maintenance. lt can made for
packing rings and various kinds of gaskets.
产品介绍：增强石墨板又称高强石墨板是由膨胀石墨卷材(板)与不同的
冲刺，平面，或网孔钢板复合而成,它具有热稳定性，高强及冷流性的特
点，是各种增强石墨垫片，加工发动机垫片等的理想材料。
Description: Reinforced expanded graphite sheet is comprised of
expanded graphite sheet and various steel sheets such us tanged, flat
or mesh. It has char thermally stability, high strength and no cold flow
etc. lt is an ideal material of all kinds of reinforced graphite gaskets,
engine heat gaskets etc.
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
产品介绍：选用优质石棉纤维、橡胶及其它化工原料经特殊配合
后采用辊压法压制而成。根据客户要求可夹带金属丝。主要使用
手介质为水、水蒸气、等各种机械、汽车、农机、石油化工炼
钢、发电、造船、等工业的密封及隔热。耐油石棉橡胶板采用优
质石棉纤维、耐油橡胶及其它化工原料经特殊配合后采用辊压法
压制而成。根据客户要求可夹带金属丝。主要使用于介质为各种
油 类 、 水 、 水 蒸 气 、 一 般 气 体 等 各 种 管 道 法 兰 、 阀 门 、 热 交
器、压力容器、机械设备、汽车、航空等工业的密封及隔热。
常用规格：
厚度:0.5~5.0mm
长宽：1500x4000mm,可分切成1500x1000mm或其它规格。
Description: Compressed Asbestos Fibre(CAF)Jointing Sheet, Red/Black/Graphited Manufactured from asbestos fibre and rubber
compounded and compressed into sheet forms Suitable as a jointing medium on heating installations and low pressure water and
steam pipelines.
产品介绍：产品包括四氟板、管、棒、薄膜以及垫片等,由100%的
纯四氟原料经模压或车削等工艺精制而成。在已知的塑料中，四氟
具有最好的耐腐蚀性，不老化，低摩擦系数,耐磨擦等优异性能。
Description: PTFE Sheet, Rods, Tube, Tape are all made from
high molecular compound of teflon.
Description: Expanded graphite braided packing is made of
pure expanded graphite yarn, braided into packing through
all kinds of technology of braiding. The product is almost
suitable to all media, such as hot water, steam, acids, alkalis,
organic solvents, hydrocarbons, low temperature liquid, etc.
产品介绍：膨胀石墨盘根根采用棉纱增强膨胀石墨线经穿心编
织而成具有良好的自润滑性及导热性，摩擦系数小，通用性
强，柔软性好强度高,对轴杆不易磨损等优点。根据不同的工
况,可采用不同的非金属和金属丝增强。广泛应用于石化、发电
厂、钢厂等阀门、泵类、膨胀节、混合机、搅拌器等设备。
应用介质：热水、高温高压蒸汽、热交换介质、氨、氢、有机
溶剂、碳氢化合物、低温液体等。
产品介绍：纯四氟盘根是由纯聚四氟乙烯线编织而成，不浸清四氟
乳液和油脂，具有 越的耐蚀性能，良好的自润滑性和防粘贴性被
建议用于食品行业、医药、造纸、化纤、精细化工等不允许有污染
的操作场合。
应用介质：除熔融性碱金属和游离的氟离子以外的所有化学介质。
Description: Pure PTFE fiber braided packing is a braided
packing made of PTFE yarn without soaking any PTFE
dispersion and lubrication but with greatly enhanced ability to
seal high speed shafts with the addition of inactive and heatresisting agents.
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
Description: PTFE graphite fiber braided packing consists of
PTFE yarn containing graphite particles. lt has great tear
strength and high thermal, low coefficient of friction also makes
it stability and long service.
产品介绍：四氟石墨盘根是由含石墨粒子的聚四氟乙烯线编织而
成，应用范围广，使用寿命长。它具有高导热，低摩性能尤其适用
于高线速动态密封。四氟石墨盘根可应用于食品、医药、造纸、石
化、机械制造等工业中的阀门、水泵、搅拌器、湿合器，压缩机
等。
应用介质：使用于除强氧化性介质以外的极大多数介质。
Description: Carbonized fiber packing is a braided packing
made of carbonized poly acrylonitrile fiber and finished with
PTFE dispersion and lubricant. lt covers wide range of
application, for example, it can seal water, brine, factory wastes
alt solutions, mineral oil etc.
产品介绍：碳化纤维盘根(浸四氟)又称预氧丝盘根是由腈纶纤维预
氧化后编织而成。表面采用聚四乙烯乳液和润滑剂处理。不但具有
优良的热传导性，耐磨性及化学稳定性，而且机械强度高使用寿命
长是各种动静密封的理想材料。一般应用于石油、冶金化工、化
肥、发电、采煤等工业中的阀、泵、法兰、搅拌器、拌合器、船尾
浆轴等的密封。
应用介质：弱酸、碱、盐、有机溶剂、海水、工厂废水、矿油等。
Description: Carbon fiber packing is made from carbon fiber
impregnated with graphite dispersion Braided into square
cross-section and lubricated. Inert to almost all-corrosive
chemicals.
产品介绍：高碳纤维盘根由进口高碳纤维与石墨、润滑剂等填充材
料编织而成。具有自润滑，高强度，耐腐蚀，耐高低温等完美性
能，是解决高温，高压，高耐磨，高腐蚀等密封难题最有效的动静
密封元件。一般应用于航空航天、化工、石油、发电，钢铁等工业
领域中的泵和混合器及其它旋转设备。
应用介质：几乎所有流体(除少数强氧化性介质)。
产品介绍：由美国杜邦 Kevlar纤维浸渍聚四氟乳液和润滑剂编织而
成。具有突出的耐磨性，较好的耐化学性，高回弹，低冷流和高转
速、高模数的性质(被称为人造金属线)。一般用于石化、制药、食
品，造纸及电力行业中的泵、阀、旋转机械等设备。
应用介质：适用于含固体颗粒的磨损介质，推荐使用于溶剂、液化
汽、糖浆及纸浆等含磨损物流体。
Description: Kevlar fiber braided packing is made of Du Pont's
Kevlar yarm impregnated with PTFE dispersion and processed
with lubricant briaded into square cross sectio. As the strength
and module of Kemar is as high as the steel-like strength.
DONGHENG
CARBONIZED FIBER WITH GRAPHITE BRAIDED PACKING
芳纶
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
Description: The braided packing made from acrylic fiber
which is impregnated with PTFE dispersion and silicon free
lubricants. lt is a flexible, resilient, homogeneous and
compact packing
产品介绍：以浸四氟的聚丙烯腈有机合成纤维为原料，经增强处
理、浸渍聚四氟乙烯编织而成。具有高强度、耐磨耗、抗冲刷等
性能是石棉盘根的理想代替品。特别适用于石化、制药、食品等
各行业。
应用介质：适用于除强酸、强碱及强氧化性介质以外的大部分化
学介质,尤其适合中温、高压、高速及不允许被污染的场合。
产品介绍：由高质量苎麻线经四氟乳液(或石墨乳)处理过在编织过程
中再次充分浸渍特殊四氟乳液(或石墨乳)及阻隔剂,具有高强度,耐塞
耗,抗冲剧等性能,对泵轴或阀杆不会造成磨损是一种较经济的盘根。
一般应该用于油田,煤矿,酸造业、食品、药物、造纸、造船业中各类
泵、精炼设备、过滤器、阀门、螺旋浆等设备。
应用介质：适用于各种水质、海水、发电、油类、脂类、弱酸、弱碱
等研磨介质。
Description: Ramie fiber braided packing is readily controllable
packing which can treat Shafts gently. lt is used in many fields.
such us ship building. paper-making industry, beverages industry
and brewing etc.
产品介绍：高等级石棉盘根经橡胶及石墨处理，根据要求可里、外涂石墨，
每根石棉线中再用INCONEL或其它金属丝增强。可用于高温、高压情况下的
门及转速较慢的设备。也可作为静密封用于手孔、人孔、壳盖炉门等密封。
Description: Good quality asbestos packing treated with rubber and
graphite inside and outside coated, each yarm reinforced by Inconel wire.
产品介绍：由高品质的陶瓷纤维编织而成。也可作为保温，隔热防火材
料可夹不锈钢等金属丝，适用于高温、高压的机、泵、阀的密封。可广
泛应用于化工、电力、治炼、造纸等行业高温炉门及机、泵、等密封。
应用介质：洁净流体或浆体、盐水、高温气体溶剂等。
Description: The ceramic fiber packing is a kind of good refractory
material which has the high-temp resistant, small heat capacity,
good property of heat preservation, high-temp insulation, and
nontoxicity, etc
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
产品介绍：把石墨卷材分切成带状，然后经专用的花纹压辊滚压成
波纹状，在应急维护中作垫片使用，也可作为盘根填料使用，使用
时直接把石墨带缠绕在泵、阀的轴上，缠绕至一定尺寸后，用压盖
压实即可，为安装方便可背胶。
产品介绍：由中碱玻璃纤维编织而成，无任何浸渍剂，在应用时不会收缩
也不会膨胀。也可涂石墨加金属丝增强或浸四氟处理,提高了其回弹性，
一般应用于电力、治金、化工等行业的炉门、容器、人孔、给水泵、管道
等工业设备的密封、绝热、防火。
应用介质：适用于水、污水、弱酸、弱碱蒸汽、空气、油料等中性介质。
Description: Glass fibre packing is braided with high quality E-glass
fiber without ant impregnant. Glass fibre packing is braided without
any flammability component.
Glass fibre packing is static packing
Description: The flexible graphite corrugated tape and selfadhesive tape are made of expanded graphite tape pressed by
figured roller. The tape normally used moulded for packing
rings, can be wound on valve rod and pump axis directly, for
emergency use, can adhere to sealing surfaces of straight line
shaped or large diameter flanges as gasket.
产品介绍：编织石墨带/布由石墨线编织而成。石墨带/布的一面可粘贴背胶，易于安装。可用不同的金属丝增强以提高其机械强
度。膨胀石墨带具有良好的热传导，耐化学介质，及高回弹特性。常用于容器、法兰，尤其是表面不平整及高温、高压的场合，如
换垫器、锅炉、管道、炉门、箱盖等处。带状垫片安装时远比传统的切割垫片方便，在应急维修中，带状垫片非常灵活。编织石墨
布、带的一般尺寸为：宽度≤1000mm；厚度: 1.5~6mm
Description: The braded expanded graphite Tape the belt shape structure compacting braded by expanded graphite wire,
soft and high strength, usually used as the packing and gasket material. The metal wire reinforced structure on require.
产品介绍：由各种盘根压制成环。根据各
种盘根的使用工况即可单独使用，也可和
石墨填料环或其它盘根环组合使用以提高
填料细的抗剂出和抗剪切变形性能。常用
的盘根环有高碳纤维盘根环，芳盘根环，
四角芳轮四氟盘根环，石棉石墨盘根环，
纯四氯盘根环，石棉四氟盘根环，四氟石
墨盘根环，苎麻盘根环，高水基盘根环，
亚克力纤维盘根环等等。
应用介质：不同的介质选用不同的盘根环
或各种盘根环组合使用。
Description: Molded packing ring is made from different kinds of packing. It can be produced as customers' request and
used widely in many situation.
DONGHENG
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
DONGHENG
EN 1514-2:2014 (E)
Table 1 — Dimensions 欧标尺寸 Dimensions in millimetres
DN
Inner diameter of the inner ring Width of the inner ring Inner diameter of the sealing element Width of the sealing element Inner diameter of the centring ring Width of the sealing element Inner diameter of the centring ring Outside diameter of the centring ring for each pressure class
d1 bIR min d2 min bD min d3 min bD min d3 min d4
PN 10, PN 16, PN 25, PN 40 PN 63, PN 100, PN 160 PN 10 PN 16 PN 25 PN 40 PN 63 PN 100 PN 160
10 18 3,0 24 5 34 5 34 46 56
15 23 3,0 29 5 39 5 39 51 61
20 28 3,0 34 6 46 — — 61 —
25 35 3,0 41 6 53 6 53 71 82
32 43 3,0 49 6 61 — — 82 —
40 50 3,0 56 6 68 6 68 92 103
50 61 4,5 70 8 86 8 86 107 113 119
65 77 4,5 86 8 102 10 106 127 137 143
80 90 4,5 99 8 115 10 119 142 148 154
100 115 6,0 127 8 143 10 147 162 168 174 180
125 140 6,0 152 10 172 12 176 192 194 210 217
150 167 6,0 179 10 199 12 203 218 224 247 257
200 216 6,0 228 10 248 12 252 273 284 290 309 324
250 267 6,0 279 12 303 14 307 327 329 340 352 364 391 388
300 318 6,0 330 12 354 14 358 377 384 400 417 424 458 458
350 360 8,0 376 12 400 14 404 437 444 457 474 486 512 —
400 410 6,0 422 14 450 17 456 488 495 514 546 543 572 —
500 510 6,0 522 14 550 17 556 593 617 624 628 657 704 —
600 610 6,0 622 14 650 17 656 695 734 731 747 764 813 —
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
28
Flange Size (NPS) Classes 150, 300, 400, 600 Classes 900, 1500, 2500 150 300 400 600 900 1500 2500 150 300 400 600 900 1500 2500
1∕2
3∕4
11∕4
11∕2
21∕2
31∕2 4 149.4 149.4 127.0 127.0 120.7 120.7 120.7 117.6 117.6 174.8 181.1 177.8 193.8 206.5 209.6 235.0 5 177.8 177.8 155.7 155.7 147.6 147.6 147.6 143.0 143.0 196.9 215.9 212.9 241.3 247.7 254.0 279.4 6 209.6 209.6 182.6 182.6 174.8 174.8 174.8 171.5 171.5 222.3 251.0 247.7 266.7 289.1 282.7 317.5 8 263.7 257.3 233.4 233.4 225.6 225.6 222.3 215.9 215.9 279.4 308.1 304.8 320.8 358.9 352.6 387.4 10 317.5 311.2 287.3 287.3 274.6 274.6 276.4 266.7 270.0 339.9 362.0 358.9 400.1 435.1 435.1 476.3 12 374.7 368.3 339.9 339.9 327.2 327.2 323.9 323.9 317.5 409.7 422.4 419.1 457.2 498.6 520.7 549.4 ASME B16.20-2017 Dimensions in millimetres Table 2 Dimensions Outside Diameter of Gasket Inside Diameter of Gasket by Class Outside Diameter of Centering Ring by Class 31.8 31.8 19.1 19.1 [Note (1)] 19.1 [Note (1)] 19.1 19.1 47.8 54.1 [Note (1)] 54.1 [Note (1)] 63.5 69.9 39.6 39.6 25.4 25.4 [Note (1)] 25.4 [Note (1)] 25.4 25.4 57.2 66.8 [Note (1)] 66.8 [Note (1)] 69.9 76.2 1 47.8 47.8 31.8 31.8 [Note (1)] 31.8 [Note (1)] 31.8 31.8 66.8 73.2 [Note (1)] 73.2 [Note (1)] 79.5 85.9 60.5 60.5 47.8 47.8 [Note (1)] 47.8 [Note (1)] 39.6 39.6 76.2 82.6 [Note (1)] 82.6 [Note (1)] 88.9 104.9 69.9 69.9 54.1 54.1 [Note (1)] 54.1 [Note (1)] 47.8 47.8 85.9 95.3 [Note (1)] 95.3 [Note (1)] 98.6 117.6 2 85.9 85.9 69.9 69.9 [Note (1)] 69.9 [Note (1)] 58.7 58.7 104.9 111.3 [Note (1)] 111.3 [Note (1)] 143.0 146.1 98.6 98.6 82.6 82.6 [Note (1)] 82.6 [Note (1)] 69.9 69.9 124.0 130.3 [Note (1)] 130.3 [Note (51] 165.1 168.4 3 120.7 120.7 101.6 101.6 [Note (1)] 101.6 95.3 92.2 92.2 136.7 149.4 [Note (1)] 149.4 168.4 174.8 196.9 133.4 [Note (1)] 114.3 114.3 [Note (1)] 104.8 [Note (1)] [Note (1)] [Note (1)] 161.9 165.1 [Note (1)] 161.9 [Note (1)] [Note (1)] [Note (1)]
14 406.4 400.1 371.6 371.6 362.0 362.0 355.6 362.0 [Note (1)] 450.9 485.9 482.6 492.3 520.7 577.9 [Note (1)]
16 463.6 457.2 422.4 422.4 412.8 412.8 412.8 406.4 [Note (1)] 514.4 539.8 536.7 565.2 574.8 641.4 [Note (1)]
18 527.1 520.7 474.7 474.7 469.9 469.9 463.6 463.6 [Note (1)] 549.4 596.9 593.9 612.9 638.3 704.9 [Note (1)]
20 577.9 571.5 525.5 525.5 520.7 520.7 520.7 514.4 [Note (1)] 606.6 654.1 647.7 682.8 698.5 755.7 [Note (1)]
24 685.8 679.5 628.7 628.7 628.7 628.7 628.7 616.0 [Note (1)] 717.6 774.7 768.4 790.7 838.2 901.7 [Note (1)]
GENERAL NOTES: (1) There are no Class 400 flangesinNPS 1 ∕ 2 throug NPS 31 2 (use Class 600); Class 900 flangesin NPS 1 2 through NPS 21 2 orin NPS 31 2 (use Class 1500);
Class 1500 flangesinNPS 31 2; or Class 2500
flanges in NPS 31 2 or NPS 14 and larger.
DONGHENG
29
Flange Size
Table 3 Dimensions
(NPS)
Class 150 Class 300 Class 600 Class 900
Gasket Centering- Gasket Gasket Gasket Centering- Ring Outside Diameter Gasket Inside Diameter [Notes Outside Diameter Inside Diameter [Notes Outside Diameter Inside Diameter [Notes Outside Diameter Inside Diameter [Notes Outside Diameter 26 673.1 704.9 774.7 685.8 736.6 835.2 685.8 736.6 831.9 685.8 736.6 866.9 685.8 736.6 882.7 28 723.9 755.7 831.9 736.6 787.4 898.7 736.6 787.4 892.3 736.6 787.4 914.4 736.6 787.4 946.2 30 774.7 806.5 882.7 793.8 844.6 952.5 793.8 844.6 946.2 793.8 844.6 971.6 793.8 844.6 1 009.7 32 825.5 860.6 939.8 850.9 901.7 1 006.6 850.9 901.7 1 003.3 850.9 901.7 1 022.4 850.9 901.7 1 073.2 34 876.3 911.4 990.6 901.7 952.5 1 057.4 901.7 952.5 1 054.1 901.7 952.5 1 073.2 901.7 952.5 1 136.7 36 927.1 968.5 1 047.8 955.8 1 006.6 1 117.6 955.8 1 006.6 1 117.6 955.8 1 006.6 1 130.3 958.9 1 009.7 1 200.2 38 977.9 1 019.3 1 111.3 977.9 1 016.0 1 054.1 971.6 1 022.4 1 073.2 990.6 1 041.4 1 104.9 1 035.1 1 085.9 1 200.2 40 1 028.7 1 070.1 1 162.1 1 022.4 1 070.1 1 114.6 1 025.7 1 076.5 1 127.3 1 047.8 1 098.6 1 155.7 1 098.6 1 149.4 1 251.0 42 1 079.5 1 124.0 1 219.2 1 073.2 1 120.9 1 165.4 1 076.5 1 127.3 1 178.1 1 104.9 1 155.7 1 219.2 1 149.4 1 200.2 1 301.8 44 1 130.3 1 178.1 1 276.4 1 130.3 1 181.1 1 219.2 1 130.3 1 181.1 1 231.9 1 162.1 1 212.9 1 270.0 1 206.5 1 257.3 1 368.6 46 1 181.1 1 228.9 1 327.2 1 178.1 1 228.9 1 273.3 1 193.8 1 244.6 1 289.1 1 212.9 1 263.7 1 327.2 1 270.0 1 320.8 1 435.1 48 1 231.9 1 279.7 1 384.3 1 235.2 1 286.0 1 324.1 1 244.6 1 295.4 1 346.2 1 270.0 1 320.8 1 390.7 1 320.8 1 371.6 1 485.9 GENERAL NOTES: (1) There are no Class 900 flanges in NPS 50 and larger. 50 1 282.7 1 333.5 1 435.1 1 295.4 1 346.2 1 378.0 1 295.4 1 346.2 1 403.4 1 320.8 1 371.6 1 447.8 [Note (1)] [Note (1)] [Note (1)] 52 1 333.5 1 384.3 1 492.3 1 346.2 1 397.0 1 428.8 1 346.2 1 397.0 1 454.2 1 371.6 1 422.4 1 498.6 [Note (1)] [Note (1)] [Note (1)] 54 1 384.3 1 435.1 1 549.4 1 403.4 1 454.2 1 492.3 1 403.4 1 454.2 1 517.7 1 428.8 1 479.6 1 555.8 [Note (1)] [Note (1)] [Note (1)] 56 1 435.1 1 485.9 1 606.6 1 454.2 1 505.0 1 543.1 1 454.2 1 505.0 1 568.5 1 479.6 1 530.4 1 612.9 [Note (1)] [Note (1)] [Note (1)] 58 1 485.9 1 536.7 1 663.7 1 511.3 1 562.1 1 593.9 1 505.0 1 555.8 1 619.3 1 536.7 1 587.5 1 663.7 [Note (1)] [Note (1)] [Note (1)] 60 1 536.7 1 587.5 1 714.5 1 562.1 1 612.9 1 644.7 1 568.5 1 619.3 1 682.8 1 593.9 1 644.7 1 733.6 [Note (1)] [Note (1)] [Note (1)] Centering- Ring Outside Diameter Centering- Ring Outside Diameter Inside Diameter [Notes Outside Diameter Centering- Ring Outside Diameter Ring Outside Diameter
Class 400
ASME B16.47A-2017 Dimensions in millimetres
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
30
Flange Size
Table 4 Dimensions
(NPS)
Class 150 Class 300 Class 600 Class 900
Gasket Centering- Gasket Gasket Gasket Centering- Ring Outside Diameter Gasket Inside Centering- Ring Outside Diameter Diameter [Notes Outside Diameter Inside Diameter [Notes Outside Diameter Inside Diameter [Notes Outside Diameter Inside Diameter [Notes Outside Diameter Outside Diameter 26 673.1 698.5 725.4 673.1 711.2 771.7 666.8 698.5 746.3 663.7 714.5 765.3 692.2 749.3 838.2 28 723.9 749.3 776.2 723.9 762.0 825.5 714.5 749.3 800.1 704.9 755.7 819.2 743.0 800.1 901.7 30 774.7 800.1 827.0 774.7 812.8 886.0 765.3 806.5 857.3 778.0 828.8 879.6 806.5 857.3 958.9 32 825.5 850.9 881.1 825.5 863.6 939.8 812.8 860.6 911.4 831.9 882.7 933.5 863.6 914.4 1 016.0 34 876.3 908.1 935.0 876.3 914.4 993.9 866.9 911.4 962.2 889.0 939.8 997.0 920.8 971.6 1 073.2 36 927.1 958.9 987.6 927.1 965.2 1 047.8 917.7 965.2 1 022.4 939.8 990.6 1 047.8 946.2 997.0 1 124.0 38 974.9 1 009.7 1 044.7 1 009.7 1 047.8 1 098.6 971.6 1 022.4 1 073.2 990.6 1 041.4 1 104.9 1 035.1 1 085.9 1 200.2 40 1 022.4 1 063.8 1 095.5 1 060.5 1 098.6 1 149.4 1 025.7 1 076.5 1 127.3 1 047.8 1 098.6 1 155.7 1 098.6 1 149.4 1 251.0 42 1 079.5 1 114.6 1 146.3 1 111.3 1 149.4 1 200.2 1 076.5 1 127.3 1 178.1 1 104.9 1 155.7 1 219.2 1 149.4 1 200.2 1 301.8 44 1 124.0 1 165.4 1 197.1 1 162.1 1 200.2 1 251.0 1 130.3 1 181.1 1 231.9 1 162.1 1 212.9 1 270.0 1 206.5 1 257.3 1 368.6 46 1 181.1 1 224.0 1 255.8 1 216.2 1 254.3 1 317.8 1 193.8 1 244.6 1 289.1 1 212.9 1 263.7 1 327.2 1 270.0 1 320.8 1 435.1 48 1 231.9 1 270.0 1 306.6 1 263.7 1 311.4 1 368.6 1 244.6 1 295.4 1 346.2 1 270.0 1 320.8 1 390.7 1 320.8 1 371.6 1 485.9 50 1 282.7 1 325.6 1 357.4 1 317.8 1 355.9 1 419.4 1 295.4 1 346.2 1 403.4 1 320.8 1 371.6 1 447.8 [Note (1)] [Note (1)] [Note (1)]
52 1 333.5 1 376.4 1 408.2 1 368.6 1 406.7 1 470.2 1 346.2 1 397.0 1 454.2 1 371.6 1 422.4 1 498.6 [Note (1)] [Note (1)] [Note (1)]
54 1 384.3 1 422.4 1 463.8 1 403.4 1 454.2 1 530.4 1 403.4 1 454.2 1 517.7 1 428.8 1 479.6 1 555.8 [Note (1)] [Note (1)] [Note (1)]
56 1 444.8 1 478.0 1 514.6 1 479.6 1 524.0 1 593.9 1 454.2 1 505.0 1 568.5 1 479.6 1 530.4 1 612.9 [Note (1)] [Note (1)] [Note (1)]
58 1 500.1 1 528.8 1 579.6 1 535.2 1 573.3 1 655.8 1 505.0 1 555.8 1 619.3 1 536.7 1 587.5 1 663.7 [Note (1)] [Note (1)] [Note (1)]
60 1 557.3 1 586.0 1 630.4 1 589.0 1 630.4 1 706.6 1 568.5 1 619.3 1 682.8 1 593.9 1 644.7 1 733.6 [Note (1)] [Note (1)] [Note (1)] ASME B16.47B-2017 Dimensions in millimetres Class 400 Inside Diameter [Notes Ring Outside Diameter Centering- Ring Outside Diameter Centering- Ring Outside Diameter
GENERAL NOTES: (1) There are no Class 900 flanges in NPS 50 and larger.
DONGHENG
31
Flange
Size
Table 5 Inside Diameters of Inner Rings
(NPS)
Inside Diameter of Inner Ring by Pressure Class, mm (in.)
150 300 400 600 900 1500 2500
1
∕
2 14.2 (0.56) 14.2 (0.56) [Note (1)] 14.2 (0.56) [Note (1)] 14.2 (0.56) 14.2 (0.56)
3
∕
4 20.6 (0.81) 20.6 (0.81) [Note (1)] 20.6 (0.81) [Note (1)] 20.6 (0.81) 20.6 (0.81)
1 26.9 (1.06) 26.9 (1.06) [Note (1)] 26.9 (1.06) [Note (1)] 26.9 (1.06) 26.9 (1.06)
11
∕
4 38.1 (1.50) 38.1 (1.50) [Note (1)] 38.1 (1.50) [Note (1)] 33.3 (1.31) 33.3 (1.31)
11
∕
2 44.5 (1.75) 44.5 (1.75) [Note (1)] 44.5 (1.75) [Note (1)] 41.4 (1.63) 41.4 (1.63)
2 55.6 (2.19) 55.6 (2.19) [Note (1)] 55.6 (2.19) [Note (1)] 52.3 (2.06) 52.3 (2.06)
21
∕
2 66.5 (2.62) 66.5 (2.62) [Note (1)] 66.5 (2.62) [Note (1)] 63.5 (2.50) 63.5 (2.50)
3 81.0 (3.19) 81.0 (3.19) [Note (1)] 81.0 (3.19) 78.7 (3.10) 78.7 (3.10) 78.7 (3.10)
31
∕
2 101.1 (3.98) 101.1 (3.98) [Note (1)] 91.4 (3.60) [Note (1)] [Note (1)] [Note (1)]
4 106.4 (4.19) 106.4 (4.19) 102.6 (4.04) 102.6 (4.04) 102.6 (4.04) 97.8 (3.85) 97.8 (3.85)
5 131.8 (5.19) 131.8 (5.19) 128.3 (5.05) 128.3 (5.05) 128.3 (5.05) 124.5 (4.90) 124.5 (4.90)
6 157.2 (6.19) 157.2 (6.19) 154.9 (6.10) 154.9 (6.10) 154.9 (6.10) 147.3 (5.80) 147.3 (5.80)
8 215.9 (8.50) 215.9 (8.50) 205.7 (8.10) 205.7 (8.10) 196.9 (7.75) 196.9 (7.75) 196.9 (7.75)
10 268.2 (10.56) 268.2 (10.56) 255.3 (10.05) 255.3 (10.05) 246.1 (9.69) 246.1 (9.69) 246.1 (9.69)
12 317.5 (12.50) 317.5 (12.50) 307.3 (12.10) 307.3 (12.10) 292.1 (11.50) 292.1 (11.50) 292.1 (11.50)
14 349.3 (13.75) 349.3 (13.75) 342.9 (13.50) 342.9 (13.50) 320.8 (12.63) 320.8 (12.63) [Note (1)]
16 400.1 (15.75) 400.1 (15.75) 389.9 (15.35) 389.9 (15.35) 374.7 (14.75) 368.3 (14.50) [Note (1)]
18 449.3 (17.69) 449.3 (17.69) 438.2 (17.25) 438.2 (17.25) 425.5 (16.75) 425.5 (16.75) [Note (1)]
20 500.1 (19.69) 500.1 (19.69) 489.0 (19.25) 489.0 (19.25) 482.6 (19.00) 476.3 (18.75) [Note (1)]
24 603.3 (23.75) 603.3 (23.75) 590.6 (23.25) 590.6 (23.25) 590.6 (23.25) 577.9 (22.75) [Note (1)]
GENERAL NOTES:
NOTE: (1) There are no Class 400 flanges in NPS 1
∕
2 through NPS 31
∕
2 (use Class 600); Class 900 flanges in NPS 1
∕
2 through NPS 21
∕
2 or in NPS 31
∕
2
(use Class 1500); Class 1500 flanges in NPS 31
∕
2; or Class 2500 flanges in NPS 31
∕
2 or NPS 14 and larger.
Dimensions in millimetres
ASME B16.20-2017
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
32
Flange
Size
Table 6 Inside Diameters ofInner Rings
(NPS)
Inside Diameter of Inner Ring by Pressure Class, mm (in.)
150 300 400 600 900
26 654.1 (25.75) 654.1 (25.75) 660.4 (26.00) 647.7 (25.50) 660.4 (26.00)
28 704.9 (27.75) 704.9 (27.75) 711.2 (28.00) 698.5 (27.50) 711.2 (28.00)
30 755.7 (29.75) 755.7 (29.75) 755.7 (29.75) 755.7 (29.75) 768.4 (30.25)
32 806.5 (31.75) 806.5 (31.75) 812.8 (32.00) 812.8 (32.00) 812.8 (32.00)
34 857.3 (33.75) 857.3 (33.75) 863.6 (34.00) 863.6 (34.00) 863.6 (34.00)
36 908.1 (35.75) 908.1 (35.75) 917.7 (36.13) 917.7 (36.13) 920.8 (36.25)
38 958.9 (37.75) 952.5 (37.50) 952.5 (37.50) 952.5 (37.50) 1 009.7 (39.75)
40 1 009.7 (39.75) 1 003.3 (39.50) 1 000.3 (39.38) 1 009.7 (39.75) 1 060.5 (41.75)
42 1 060.5 (41.75) 1 054.1 (41.50) 1 051.1 (41.38) 1 066.8 (42.00) 1 111.3 (43.75)
44 1 111.3 (43.75) 1 104.9 (43.50) 1 104.9 (43.50) 1 111.3 (43.75) 1 155.7 (45.50)
46 1 162.1 (45.75) 1 152.7 (45.38) 1 168.4 (46.00) 1 162.1 (45.75) 1 219.2 (48.00)
48 1 212.9 (47.75) 1 209.8 (47.63) 1 206.5 (47.50) 1 219.2 (48.00) 1 270.0 (50.00)
50 1 263.7 (49.75) 1 244.6 (49.00) 1 257.3 (49.50) 1 270.0 (50.00) [Note (1)]
52 1 314.5 (51.75) 1 320.8 (52.00) 1 308.1 (51.50) 1 320.8 (52.00) [Note (1)]
54 1 358.9 (53.50) 1 352.6 (53.25) 1 352.6 (53.25) 1 378.0 (54.25) [Note (1)]
56 1 409.7 (55.50) 1 403.4 (55.25) 1 403.4 (55.25) 1 428.8 (56.25) [Note (1)]
58 1 460.5 (57.50) 1 447.8 (57.00) 1 454.2 (57.25) 1 473.2 (58.00) [Note (1)]
60 1 511.3 (59.50) 1 524.0 (60.00) 1 517.7 (59.75) 1 530.4 (60.25) [Note (1)]
GENERAL NOTES:
NOTE: (1) There are no Class 900 flanges in NPS 50 and larger.
ASME B16.47A-2017
Dimensions in millimetres
DONGHENG 33
Flange
Size
Table 7 Inside Diameters of Inner Rings
(NPS)
Inside Diameter of Inner Ring by Pressure Class, mm (in.)
150 300 400 600 900
26 654.1 (25.75) 654.1 (25.75) 654.1 (25.75) 644.7 (25.38) 666.8 (26.25)
28 704.9 (27.75) 704.9 (27.75) 701.8 (27.63) 685.8 (27.00) 717.6 (28.25)
30 755.7 (29.75) 755.7 (29.75) 752.6 (29.63) 752.6 (29.63) 781.1 (30.75)
32 806.5 (31.75) 806.5 (31.75) 800.1 (31.50) 793.8 (31.25) 838.2 (33.00)
34 857.3 (33.75) 857.3 (33.75) 850.9 (33.50) 850.9 (33.50) 895.4 (35.25)
36 908.1 (35.75) 908.1 (35.75) 898.7 (35.38) 901.7 (35.50) 920.8 (36.25)
38 958.9 (37.75) 971.6 (38.25) 952.5 (37.50) 952.5 (37.50) 1 009.7 (39.75)
40 1 009.7 (39.75) 1 022.4 (40.25) 1 000.3 (39.38) 1 009.7 (39.75) 1 060.5 (41.75)
42 1 060.5 (41.75) 1 085.9 (42.75) 1 051.1 (41.38) 1 066.8 (42.00) 1 111.3 (43.75)
44 1 111.3 (43.75) 1 124.0 (44.25) 1 104.9 (43.50) 1 111.3 (43.75) 1 155.7 (45.50)
46 1 162.1 (45.75) 1 178.1 (46.38) 1 168.4 (46.00) 1 162.1 (45.75) 1 219.2 (48.00)
48 1 212.9 (47.75) 1 231.9 (48.50) 1 206.5 (47.50) 1 219.2 (48.00) 1 270.0 (50.00)
50 1 263.7 (49.75) 1 267.0 (49.88) 1 257.3 (49.50) 1 270.0 (50.00) [Note (1)]
52 1 314.5 (51.75) 1 317.8 (51.88) 1 308.1 (51.50) 1 320.8 (52.00) [Note (1)]
54 1 365.3 (53.75) 1 365.3 (53.75) 1 352.6 (53.25) 1 378.0 (54.25) [Note (1)]
56 1 422.4 (56.00) 1 428.8 (56.25) 1 403.4 (55.25) 1 428.8 (56.25) [Note (1)]
58 1 478.0 (58.19) 1 484.4 (58.44) 1 454.2 (57.25) 1 473.2 (58.00) [Note (1)]
60 1 535.2 (60.44) 1 557.3 (61.31) 1 517.7 (59.75) 1 530.4 (60.25) [Note (1)]
GENERAL NOTES:
NOTE: (1) There are no Class 900 flanges in NPS 50 and larger.
ASME B16.47B-2017
Dimensions in millimetres
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
34
宁波东恒密封件有限公司
Ningbo Dongheng Sealing Co.,LTD
