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Destructive testing of pipe

Destructive testing of pipe

Destructive testing of pipe

(OP)
When making pipe say wall thickness .281 is being produced and needs to have tensile pulls done.
how do i get a sample size of .965 x .394?
 

RE: Destructive testing of pipe

To what standard?, sounds like ASTM type of standard rather than ASME.  

RE: Destructive testing of pipe

(OP)
ASME

RE: Destructive testing of pipe

Which AMSE Standard?  

RE: Destructive testing of pipe

(OP)
sa-333 5" xs pipe

RE: Destructive testing of pipe

Mikeqc1, I think you've puzzled us. Tension tests would normally be done on a full section per SA-370 annex A2. Where are you getting your specimen dimensions from? Your 0.394" dimension happens to be a standard specimen size for impact tests, not tensile. If you're concerned about impact tests, look at UG-84(c)(5)(b) for sub-size specimens. But I have no idea where you got 0.965" from.

RE: Destructive testing of pipe

Ah, I found your other thread with the MTR: thread292-286224: sa-333 impacts

Is this what you are talking about? That MTR indicates a longitudinal strip test with a wall thickness of .394" on the sample. This .394" wall is within the tolerance range of NPS 5 XS pipe.

In your other thread you said you got another batch of NPS 4 pipe with .281 wall with the same heat number. I believe your MTR would not cover that NPS 4 pipe because SA-530 section 26.1.5 requires the tension sample to have the same diameter and wall thickness. Does that answer your question?
 

RE: Destructive testing of pipe

(OP)
i have an MTR for the 4" with a .281 wall, the impactsubsize works out over 80% but on that case what cert the tensile pull is .965 x .394 how can that be?

As for the 5" pipe the wall thickness covers my concern.
You input has helped me to decide that i will not reject this load of pipe, but i will look at som e of the other suppliers MTRS see if they have ever reduced the impacts on this pipe.

RE: Destructive testing of pipe

As far as I can tell, a tensile pull on a .965 X .394 strip cannot represent an SA-333 pipe with .281 wall. My guess would be they sent you the wrong MTR.  

RE: Destructive testing of pipe

(OP)
Does not seem right huh?  

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