Selection of valve standards
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Question: The flange standard is HG-20592; can it be used with valves that comply with GB standards? For example, is it okay to use the GB/T12234-2007 standard for gate valves? Are there any things to keep in mind when placing an order?
Sure, and indicate the standard for the mating flanges as well as the type of sealing surface
Yes, for gate valves, the design standard GB/T12234-2007 can be used; GB/T12234-2007 does not specify that a particular standard for flanges must be employed
When placing an order, it is necessary to specify the connection method and the standards to be followed, to ensure proper installation in the future. Standards for valve manufacturing, standards for materials, standards for structural length, standards for testing and inspection, and so on. . . .
When specifying the valve, include the required flange standard in the specifications as well； In principle, for any standard valve, it is possible to request the manufacturer to produce the valve in accordance with the design specifications ； It’s just a matter of cost; currently, HG/T 20592 and 20615 (ASME 16.5) are the most commonly used standards, and the lengths of all valves can be combined freely
Thank you to all the teachers! I now have only one question: is it necessary to specify the type of sealing surface when requesting a quote for valves? Thank you again