Issues with the structural dimensions of valves
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Experts, I want to find out how to determine the specific specifications and dimensions of valves. How can I do that? For example, GATE VALVE - BB,OS,Y CL800 SW A105 Trim:STL,Stem:A182 F6a CL.2 Packing:GBP S.S/FG SWG A193Gr.B7/A194 Gr.2H API 602 – Which standard should I refer to in order to find the dimensions of this gate valve?
What dimensions need to be checked? This is a forged steel gate valve in accordance with API 602; its connection structure length is based on ASME B16.10, and the dimensions of its connection flanges are in line with ASME B16.5
You didn’t provide any criteria; it’s only possible to tell whether it’s DN15 or DN150 based on the standard size
I checked the structural length; I compared it with the single-line diagrams of my previous projects, and the valve sizes shown in those diagrams are 5 to 7 mm larger than those listed in this table. Was padding taken into account? What is shown in the image is a 2-inch CL600; the specification value is 292, but it shows 299. Was 7 thick gaskets taken into account? It’s this that I can’t figure out
One 3.5mm gasket on each side, normal size
According to the poster’s description, for gate valves with a pressure rating of 800 pounds, there is no requirement regarding structural length for American standard ones, which are welded by socket joint; the requirements apply according to the manufacturer’s specifications. For Chinese standard valves welded by socket joint, the JB/T7746 standard can be referred to.
For 800-pound socket weld connections, the American standard does not specify any requirements regarding structural length
API602 forged steel gate valve, socket weld type – structural length: DN15---79, DN20---92, DN25---111, DN32---120, DN40---120, DN50---140
The SW gate valve of CL800 is likely a small forged valve; if the manufacturer guarantees that the dimensions are manufactured in full compliance with standards, then API602 can be referred to. If it is to be used for drawing 3D processes, the dimensions must be determined after consulting with the manufacturer.
As on the second floor, you can also consult valve manufacturers; for domestic valves, GB/T12221 can be referred to
The design standard is API602; the length standard follows the manufacturer’s specifications, while the socket and spigot standards are in accordance with B16.11