Flange standard for Z42W gas gate valve
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For our gas purification project, the documents specify that Z42W-1 valves should be used for the gas pipelines. In that case, are the flanges also specified to be of 1 kilogram grade? What is the standard for 1 kilogram of flanges? Should the pipe and flange grades of the same category also be selected as PN1?
And since it’s a gray cast iron valve, should cast iron flanges be used as well at the same grade? Can carbon steel pipes and carbon steel flanges be used together?
JB78-59 cast iron flanges, JB79-59 cast steel flanges
I checked, and the minimum standard for this is 2.5 kilograms. Is there a flange standard of 1 kilogram?
Valves do not have design standards for connection dimensions. . .
What standard is this?
Old standard HG5010-58 JB81-59
I specialize in flanges. Please measure the distance between the flange screw holes – that is, the distance between the two farthest apart screw holes. I’ll tell you which flange is suitable for use. Feel free to contact me if needed. Website: www.zhoujizhonggong.cn