金属环垫适用于高温高压，有R，RX，BX 三种型号，其中R型号有椭圆和八角两种截面，所有的金属环垫用数控精加工，严格按照ASME B16.20 和API 6A 标准 。 主要用途：石油化工，炼油，火力发电，轻纺制药，天然气管道，阀门，RTJ法兰，蒸汽和石油化工，油田等,我们可以提供30多种材料制作。 欢迎合作,技术QQ:953586626 e-mail:dingyeding-100@163.com 手机： 丁先生
Ring Joint GasketRing joint gasket can be used under the vacuum condition of 1000kgf/cm2 and more for high-pressure vessel, tower and vessel, valve bonnet, etc. including high-temperature and high-pressure steam, oil, gas, solvent, etc.
There are oval type and octagonal type as its representative shape, which can be generally used for pressure of max. 350kgf/cm2 and there is BX type for more pressure. As for oval type and octagonal type, oval type has bigger flange groove deformation.
It is because gasket itself is deformed while bolt is extended until arriving to constant pressure by increased flange connection pressure and line contact is moved to surface contact as well. Therefore, it has good initial sealing performance but gasket is largely deformed.
When Octagonal type is internally pressured, contact pressure with flange is increased, which is initially connected to surface contact. So it requests high connection pressure. But as for sealing characteristics, we can’t clearly say what type is better. Generally, octagonal type is widely used. RX type can be used for flange groove of ring joint gasket but BX type can be only used with API- STD-6BX flange.
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Name
|
Cross Section |
KUKIL NO.
|
API Type R oval ring-joint
|
 |
RJO
|
API Type R octagonal ring-joint
|
|
RJS
|
API Type RX pressure engergized ring-joint
|
|
RJRX
|
API Type BX pressure engergized ring-joint
|
|
RJBX
|
Modified Bridgeman ring-joint
|
|
RJB
|
Delta ring-joint
|
|
RJD
|
Lens ring-joint
|
|
RJL
|
Double cone ring-joint
|
|
RJW
|
Round ring-joint
|
|
RJR
|
Weld ring
|
|
WDR
|
-. RING JOINT GASKET HARDNESS Production Standards
Material
|
UNS No.
|
Hardness
|
SOFT IRON
|
-
|
90
|
CARBON STEEL
|
-
|
120
|
ASTM A182-F5
|
K42544
|
130
|
SS304
|
S30400
|
160
|
SS304L
|
S30403
|
160
|
SS316
|
S31600
|
160
|
SS316L
|
S31603
|
160
|
SS321
|
S32100
|
160
|
SS347
|
S34700
|
160
|
Inconel 600
|
N06600
|
200
|
Inconel 625
|
N06625
|
200
|
Incoloy 800
|
N08800
|
200
|
Incoloy 825
|
N08825
|
160
|
Hastelloy C276
|
N10276
|
180
|
Duplex
|
S31803
|
230
|
-. Identification mark according to ASME B16.20 standards