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产品参数：

材质

wcb wcc lcb cf8 cf8m cf3m wc6 wc9 c5 c11 c12 a105 lf2 f11 ......f22 f55

标准规范

design std: gost9544 gost33259 bs1868 api600 api6a api602 api603

end to end : asme 16.10 gb/t12221

teting: api598 gb/t13927

连接面及压力

flange connection method, welding connection method

pressure class 150# 300# 600# 900# 1500# 2500# py16 py25 py40 py63 py100 py160 py250