What is the definition of welding operations? I have seen it used in some codes but not defined. Do any codes define it? I believe it is just the process of welding or does it include the grinding and other activities between passes as well?
What is the definition of welding operations? Do any codes define it? I believe it is just the process of welding or does it include the grinding and other activities between passes as well?
We are constructing to B31.3 and have determined what we are going to define as a welding lot. We have a pipe spool in one of our welding lots that has not been fabricated correctly to the drawing. We need to cut out several welds to correct the piping spool. Should the cut out welds be...
I have a hydro test in which I have to test up against a valve. Problem is the valve is passing and the next valve in the line is a long distance away. Any suggestions?
I have been told that there is NACE documentation that states up to 100 ppm chlorides for test media is acceptable when hydrotesting stainless steel. I have searched the NACE MR0175 and have had no luck finding this information. Can someone point me in the right direction?
346.3 states records should be retained for at least five years for examination procedures and examination personnel qualifications. I would like to get some clarification on "examination procedures" and "examination personnel". What documentation should be included under these categories? Does...
Most companies require NDE to be performed after PWHT for P1 materials, however, I cannot find this as being a requirement anywhere in B31.3. I find it interesting that B31.3 states that leak testing should take place after PWHT (implying to me that soundness should be checked for for after...
Is there a difference between heat codes and heat numbers? I have an MTR for a fitting that has both a heat code and heat number and they are different numbers for the same fitting.
B31.3 331.1.3 says that heat treatment is required when the thickness through the weld in any plane is greater than twice the minimum material thickness requiring heat treatment. What is minimum material thickness referring to?
Is there anything in any of the codes that disallows the welding of dogs and pullers onto pipe? If so please reference. My understanding that this is acceptable if done right at the bevel. However, why couldn't a welder weld dogs or pullers on 2 or 3 inches back from the bevel as long as the...
Section 331.1.3 in B31.3 talks about governing weld thicknesses for branch connections and fillet welds at slip-on and socket welding flanges and piping connections. I find this confusing. Could someone explain it in plain english? Thank you.
Is it always safe to assume that A333/LF2 can be used as a substitute for A106/A105 and is there any difference in how they are manufactured or does the manufacturer simply take a batch of A106 and charpy test it and if it passes it can now be labelled A333?
How full do weldolets need to be welded. Do they need to be flush with the outside of the olet or not? Is there anything in any of the codes that speaks of this?
