joining seamless pipes
joining seamless pipes
(OP)
The very thought of having a joint in seamless pipes seems absurd but what if the required length of seamless pipe is not available and the only option is to join two pipe pieces such that the joint sustains a particular operating pressure.?is welding recommended in this case?





RE: joining seamless pipes
RE: joining seamless pipes
RE: joining seamless pipes
I have a feeling you mean small bore tubing??
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: joining seamless pipes
RE: joining seamless pipes
RE: joining seamless pipes
RE: joining seamless pipes
Piping Design Central
RE: joining seamless pipes
RE: joining seamless pipes
apart from the fact you shouldn't double post the key item is your phrase "The very thought of having a joint in seamless pipes seems absurd " Why do you think it is absurd?
All pipe needs to be joined to something else at some point otherwise it is just an empty tube. If you explain this we might be able to see where you are coming from.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: joining seamless pipes
Welding of pipe is really very common. Look here:
https://www.google.com/search?q=images+of+pipe+wel...=_
Sometimes its possible to do all the right things and still get bad results
RE: joining seamless pipes
At some point, all pipes have to be joined together.
RE: joining seamless pipes
let me lay down the specifics of my problem...
Operating conditions: water for jet washing at normal temperature and a operation duration of 14 hours subjected to a working pressure of 260 bar
Seamless pipe material: ASTM A 106 Grade B
Pipe schedule: 160
¾” (the nominal pipe size)
Important consideration:1) this pipe travels horizontally between circular supports/guides.so the weld beads should be flush with the outer surface of the pipe so as to avoid interference/jamming with the circular guides.
2)alignment..the tolerances and alignment issues are of paramount importance because any mis-alignment would inhibit smooth travel through the circular supports
circumferential butt welding of seamless pipes must be somewhat different from butt welding of welded pipes .what weld procedure should be adopted? What are the considerations for butt weld specific for seamless pipes like proper selection of filler metal
what would be the testing plan for the welded joint to ensure integrity at such operating pressures?what should be the possible configuration of test samples?
RE: joining seamless pipes
Piping Design Central
RE: joining seamless pipes
Use an TIG oribital welder with gas purge.
Don't think it is a question about how to do this. The problem that you have will be to find a good shop close to your business.
RE: joining seamless pipes
RE: joining seamless pipes
can i have videos demonstrating welding of seamless pipes..?
there must be some laid down procedures/standards for circumferential butt welding of seamless pipes..where can i find them?..
and after that how do i test them..the operating time is about 14 hours...how do i plan the testing of this joint?
RE: joining seamless pipes
Check youtube for video. https://www.youtube.com/watch?v=-w7qQ2V8jkY
Do a hydrostatic test on your entire fabricated pipe segment.http://www.eng-tips.com/viewthread.cfm?qid=385722