What are the valve manufacturing standards?
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We recently encountered problems with the valves we purchased; we need to replace two gate valves of DN100 900LB. However, upon on-site measurement, it was found that the connection dimensions of these two valves differ from those of other DN100 900LB valves. It seems they were manufactured according to different mechanical standards. The main connection dimension parameters are shown in the table below. I searched online for a long time for information regarding the manufacturing standards of these valves, focusing on the connection dimensions, but was unable to find any relevant information. Does anyone know what the main manufacturing standards for such valves are? Please send the download link so I can study properly*study*. Standard: Steel ring pitch diameter (mm), flange outer diameter (mm), bolt center distance (mm), stud specifications, number of studs, valve body length (mm). Petrochemical standard: DN100, 900LB, 149.22290235M308. Mechanical standard: DN100, 16MPa, 160300240M308450
900LB reference to American standard ASME16.34
What are the standards for valve manufacturing? I would appreciate your guidance!
The flange dimensions of American-standard valves should be based on uniform standards