Dear pvros,
I just received ASME 2023. It seems that for u-tube exchangers there are no link to Lmax (allowable load joint) in part 4-18 (replaced in liu of UHX in div. 1). So your calc. is not dependent to UW-20 (or actually to part 4-21).
In UW-20.3 it is clearly mentioned that it is for...
Thanks Shmulik
I used your instruction. The fitting could withstand in such pressures.
But it is still a question for me why applying such pressure for hydrotest. I asked some piping colleagues and they said that in plants - in reality- tests pressures will be 1.5 * design pressure for a line...
Hi
I'm not a piping engineer. I mostly worked on static equipments but a problem happened to me that I will appreciate if piping specialists could help me about.
We have a forged fitting (A182 F321, 3/4" SW tee type joint with 3000#). The end user has requested that hydrotest to be done as...
Thanks anyway.
You are right. Although we reweld or coat again we will face with new leakages.
But I dont agree with your solution because of the cost. it is the last solution. if we could stop a plant and remove the shell there are lots of ways to solve the problem. e.g. cutting the shell and...
the tubesheet thk. is 10 mm. it means that when we re-weld it may burn the gasket because of the heat. also we cant replace the gasket cause the equipment is installed and removing the shell is very difficult.
however it maybe the last choice to re-weld it and we hope that the gasket could be...
Thanks.
The problem is we dont have access inside because there is a bundle of tube then repair of inside is difficult. Also the shell is flanged to a bottom channel (equipment is vertical) and welding outside may harm gasket.
about the water also it maybe impossible to treat and reduce...
Hello friends,
We have an SS304 shell. there are tubes in it (like shell & tube heat exchangers). in the shell we have cooling water. We found pitting on bottom welds of the shell and the leakage of water. perhaps it was because of chloride content of water. we test the water and it has more...
