End face dimensions of valves without flange connections
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For example, where can one find the standards for the structural length and end face dimensions, wall thickness, and inner diameter of BW, SW, and NPT fittings? Are there standards for American and Chinese standards, especially those for American standards?
This post was last edited by Liu Jiajia on 2016-5-27 at 16:55. US standard: For structural length of BW, refer to ASME B16.10. There are no provisions in SW and NPT; it is determined by the manufacturer. End face dimensions: For BW, refer to ASME B16.25. For SW, refer to ASME B16.11; for NPT, refer to ASME B1.20.1. Wall thickness, inner diameter: Refer to relevant design standards; the basic general standard is ASME B16.34. National standard: Structural length: See GB/T12221. End face dimensions: For BW, refer to GB/T12224. For SW, refer to JB/T1751; for NPT, refer to GB/T12716. Wall thickness, inner diameter: Refer to relevant design standards; the basic general standard is GB/T12224. Due to the large number of valve types and standards, what is mentioned above is only a general overview; for specific details, it is necessary to refer to the relevant standards. Extra care should be taken with ball valves, butterfly valves, plug valves, etc.