I would present one more reference of "Pressure-containing Parts" definition. It is NACE Standard MR0175 (Let me go up to and incl. "2002" edition).
Quoted, "Those parts whose failure to function as intended would result in a release of retained fluid to the atmosphere. Examples are valve...
Hello,
The high strength grades of API 5L such as Grade X42, X60 seems to be more close to A106-B or C rather than A335 (low alloy steel).
Of course, X grades of API 5L is also required to think about weldability more careful than 35 ksi like A106-B. I think, however, still P No.1 is S1 so...
Thanks members,
I will contact the nominated valve manufacturers by the members.
While, I reply to the questions that the valves are to be fully rated at the moment, but later on there is probably a chance to derate for the exact dp & dt.
Another comment to devide the piping system 2 or more...
Dear priya17385,
In the past, there is Royal-Dutch SHELL MESC specification for vacuum service. Afterward, the end-user expired this specification since the most of gland packing/ seal can withstand reverse pressure, i.e. from atomospheric to valve internal in vacuum condition. Unless...
Dear anegri and members,
Thank you for your advice.
Yes, indeed. I was also wondering to change the type of valves. The indispensable point is pressure class rating and size. The type can be negotiable.
I suppose that the key issue is full bore (no exact definition, please not ask me). So...
Dear FKE,
I read your thread and have a question, what is your preferred answer?
Any acceptable test fluid which will give you more better test result?, otherwise you are just making a question for test fluid as per API Specification 598?
I'm sorry to send a question to question, but I can...
Thanks folks,
I would reply to the three threads as follows:
- PVBS, I will try to discuss. Right now, I, however, have not worked with them for gate valves.
- NPS50 (DN1250) is real, but not fake.
- I still have a chance to change the size to NPS48 (DN1200), which is more common size in...
Dear Members,
I have headache to find out manufacturers who can produce the subject valve. Anyone can advise me the manufacturer who is specialized for such an unusual class and rating valve?
What I am sure now is that the body must be forged, but not casting because of the weight of metal...
In response to your query :
(1) The mimnimum wall thickness per ASME B16.34 includes the additional wall thickness of approx 0.01 inch as specified in F1.4 "Additional Considerations" of ANNEX-F.
(2) If valves required with 6.0mm corrosion allowance, the purchaser is to specify so as...
