I think that this temperature is only for cryogenic service. check it but for the special service. if you are not sure in the data sheet you can check the service temperature and you can make the charpy test at this temperature.
As you know 3.2 is a 3.1 with a third party inspection that see all chemical test and mechanical examination. So before that the foundry cut the sample of the good they must call to the inspector to check the test of the sample. For NDT we make the same, the foundry send the piece to the lab and...
thanks for your answer the malril base is WC9. we are going to try it with ST12. About to treat the peace we are thinking in cryogenic treatment. I dont know if with this option we solve our problem, but thanks all.
we already manufacture cryogenic valves but we can not achive the requisitions of this test for an homologation of a client.
The valve is manufacture of alloy steel and the closures and guides are averllaied with stellite. We think that the problem is the hardness of the stellite but we are not...
We are manufacturing an special valve or alloy still for an homologation We must down the temperature of the valve to -196ºC, make 500 cilcles of open- close, and ut the valve to 400ºC.before those temperatures changens and those cicles intenal part of the valves suffer a high damages.
on The...
Type 3.1: Inspection certificate 3.1
A 3.1 certificate is issued by the manufacturer and is validated by the manufacturer’s authorised inspection representative. It is equivalent to the “old” 3.1.B certificate. The certificate must declare that the products are in compliance with the order...
