- Posts: 6
- Thank you received: 0
PUP Piece how long???
- thehat
- Topic Author
- Offline
- New Member
Less More
17 years 9 months ago - 17 years 9 months ago #8587 by thehat
PUP Piece how long??? was created by thehat
I have 2 Elbows and a pup piece inbetween. Whats the minimun length that it can be what governs it. In this case its 12" Sch20 C.S.
Evertone i asked seems to have a different answer.
Evertone i asked seems to have a different answer.
Please Log in or Create an account to join the conversation.
- Ollie
- Offline
- New Member
Less More
- Posts: 5
- Thank you received: 0
17 years 9 months ago - 17 years 9 months ago #3718 by Ollie
Replied by Ollie on topic Pup length
Please Log in or Create an account to join the conversation.
- whichwayisup
- Offline
- Junior Member
Less More
- Posts: 22
- Thank you received: 0
17 years 9 months ago - 17 years 9 months ago #3719 by whichwayisup
Replied by whichwayisup on topic Pups (no kittens)
I agree with ollie on the 6" / 1 1/2 D rule for pups ...
Having said that, I've seen make-up spools that were pretty short. 2" / 50 mm pipe between weld necks.
I'm no welding expert, but I think the trick used was to make the first weld to a longer piece of pipe, then cut the pipe to length, then weld the second flange on. That way you get a "normal" heat pattern in both welds as there's more material to carry the heat away.
One other question though, can anyone tell me where the name PUP piece originated from?
Is it an abbreviation, an achronynm or a made up word??
WWIU
Having said that, I've seen make-up spools that were pretty short. 2" / 50 mm pipe between weld necks.
I'm no welding expert, but I think the trick used was to make the first weld to a longer piece of pipe, then cut the pipe to length, then weld the second flange on. That way you get a "normal" heat pattern in both welds as there's more material to carry the heat away.
One other question though, can anyone tell me where the name PUP piece originated from?
Is it an abbreviation, an achronynm or a made up word??
WWIU
Please Log in or Create an account to join the conversation.
- thehat
- Topic Author
- Offline
- New Member
Less More
- Posts: 6
- Thank you received: 0
17 years 9 months ago - 17 years 9 months ago #3720 by thehat
Replied by thehat on topic Ollie, I asked the question because
Ollie,
I asked the question because I have always believed it to be 50mm. ie. the min the shop could fabricate. I am being told otherwise and i disagree. i just wanted other views on it to make my case. There are no field welds on the job so thats not an issue.
I asked the question because I have always believed it to be 50mm. ie. the min the shop could fabricate. I am being told otherwise and i disagree. i just wanted other views on it to make my case. There are no field welds on the job so thats not an issue.
Please Log in or Create an account to join the conversation.
- Calhoun
- Offline
- New Member
Less More
- Posts: 3
- Thank you received: 0
17 years 9 months ago - 17 years 9 months ago #3721 by Calhoun
Replied by Calhoun on topic Minimum spacing between circumferential welds
Minimum spacing between circumferential welds joints shall be 2" or 6 times the wall thickness of the pipe, whichever is greater
Please Log in or Create an account to join the conversation.
- Buggernuts
- Visitor
17 years 9 months ago - 17 years 9 months ago #3725 by Buggernuts
Replied by Buggernuts on topic PUP Pieces
Please Log in or Create an account to join the conversation.
Moderators: Jop
Time to create page: 0.250 seconds