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Choke valves can be to API 6A design or ISO 10423 design standards, but there is no ASME standard choke valves even if the choke is required with ASME flanges. Also, for choke valves , user should specify material classification to API 6A - CC, DD,EE,FF or HH and testing to PSL -1/2/3/4

Hello, Choke valves must be always to API 6A design whether to API 3000 or API 20000 or ASME 150 or ASME 2500 class,as they are considered part of the wellhead equipment. Choke valve can be with API flanges or ASME flanges, in your case with ASME 600 flanges, but the Choke design should be...

Hello Sunday, It is not correct to say that control valve suppliers limit the size to 6 " on a 12 " line. Control valve manufacturers size the valve based on the process data and select the size based on the Cv and other parameters. It is a general rule and recommendation that valve size...

Many Thanks for your input , it is very useful. I checked some manufacturers websites , but could not find the information you provided. I need to check the current ISO 10497 standard. I am not a purchaser or vendor and my question was out of curiosity. some times , I recommend a package of...

Is it required to conduct a Fire safe test when the supplier claims that his valves are to Fire safe design, but no certificate. If there are 20 line items ranging from 2"to 36" with different pressure ratings and materials , then the supplier has to fire test 20 valves which cannot be used...