Is it okay to write the valve ordering information this way?
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Gate valve NPS 10, WCB/13Cr, CL150 HG/T20615; face-to-face standard: ANSI B16.10; testing standard: API 598; manufacturing standard: ANSI B16.34. What I want to ask is: it is feasible to use the American series of standards from the chemical industry for flange standards, while using ANSI standards for other standards? Or, instead of using the ANSI standards, would it be possible to use the GB valve standards? I hope brothers who know something about valves can help answer this
If it’s to meet American standards, the manufacturing standards are actually the same; it’s either national standards or American standards. With different structural lengths
The valve flange standard must be HG20615 CL150; no other standards are specified. Do you mean that in such cases, both GB and ANSI standards can be used for valve manufacturing and testing, with only the face-to-face length differing? Is that what you mean?
For pound-class products, the American standard is definitely used
The valve ordering information is very comprehensive. The valve flanges shall comply with the standards set by the Ministry of Chemical Industry, while the rest may follow American standards. It is the designers who decide what specific standards to apply, although the client can also put forward requirements. Different standards have varying requirements.