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TOPIC: Minimum spacing between circumferential welds joints

12 years 11 months ago #7209

  • chanock
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hola a todos/ HELLO to alls

i'm new in this place but i got a one question.
what is the Minimum spacing between circumferential welds joints, according to which norm or code (ASME, API OR WHAT HANDBOOK)

THANKS/GRACIAS
MIL DISCULPAS MI INGLES ES MUY MALO
SALUDOS

I presume you are referring 12 years 11 months ago #3803

  • Jop
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I presume you are referring to proximity of butt welds in pipe. This question has been asked several times. The answer is the Codes do not provide specific guidance. In this situation, use engineering judgment, such as locate the butt welds as far away as possible to avoid overlapping weld heat affected zones and stress concentration effects.

You might also want to talk to a good Welding Eng.as it could be dependent on process. If this is for proxmity of joints to one another there could be other concerns--again the Welding Eng. could help you.

For girth weld spacing, a criterion that was developed many years ago based on welding tests is: the greater of 2 inches or 4 times the wall thickness.
Do it once and Do it Right

For girth weld spacing, a 12 years 11 months ago #3805

  • chanock
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For girth weld spacing, a criterion that was developed many years ago based on welding tests is: the greater of 2 inches or 4 times the wall thickness

where I can consult this that you say, some one book, manual, formulates.
thank for your answer
saludos amigo

Go read about "Pup piece, 12 years 11 months ago #3806

  • Jop
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Go read about "Pup piece, how long?" about 5 topics down on this forum.
Do it once and Do it Right

thanks, for pups on pipelines 12 years 11 months ago #3807

  • chanock
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thanks,
for pups on pipelines i found this (to see section 9.5.4):
http://www.iploca.com/cmsFiles/File/contract/Volume2/Pdf/Doc/Section09.pdf#search=%22SECTION%209%20FIELD%20WELDING%22
but an elbow of 6 degrees not is equal than a pup, for this reason i do opened a new subject.

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