I've been asked to confirm the wall thickness of some inconel high pressure tubing to b31.3. This is high pressure tubing, design pressure 600 bar. This results in a test pressure of 900 bar. The selected wall thickness is acceptable as per section 304, and specifically equation 3a. This is using the allowable stress value from Table A-1.
Now my question is what checks do I do to ensure it is OK for testing to 900 bar? As obviously the wall thickness requirements are going to be excessive if equation 3a is used with the test pressure instead of the design pressure as the allowable stress value is the same for both cases?
Now my question is what checks do I do to ensure it is OK for testing to 900 bar? As obviously the wall thickness requirements are going to be excessive if equation 3a is used with the test pressure instead of the design pressure as the allowable stress value is the same for both cases?
