Butt Weld Angle

• Jan 31, 2021

• #2

mk3223

Mechanical

Feb 4, 2006

1,488

US

Yes.
You may butt weld two pies with the plain end, i.e. 0-deg. But, the the joint quality factor (Ej) of the pipe will be reduced per B31 Code, which may not be aceptable by the engineering design.

 

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• Feb 1, 2021

• #3

david339933

Industrial

Jun 15, 2011

1,204

CA

Ej is for long seams/helical seams, it does not apply to circ welds (pipe to pipe).

 

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• Feb 2, 2021

• #4

LittleInch

Petroleum

Mar 27, 2013

23,042

GB

That's because there isn't one.

The bevel angle is noted in the weld spec. If you try to weld square end pipe when the WPS calls for 37 degrees bevel then you are not following the WPS and your weld will probably fail the NDT.

The supplier doesn't know what you want the pipe for.

So the angle is part of your pipe specification/ data sheet.

BTW "...the ASME" is meaningless without at least the particular code number.

This question is all a bit silly as no one will weld pipe end like this

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

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• Feb 4, 2021

• #5

0707

Petroleum

Jun 25, 2001

3,454

PT

for a butt weld the usual angle is 37.5º

luis

 

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• Feb 5, 2021

• #6

kingnero

Mechanical

Aug 15, 2009

1,783

BE

That's an included angle of 75°, which looks like a lot to me. Dependig on material and welding process, it can be OK, but I would not use this as a "general" rule-of-thumb.

 

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• Feb 5, 2021

• #7

0707

Petroleum

Jun 25, 2001

3,454

PT

kinginero

of course it depends on the thikness but the usual is whate I said

 

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• Feb 5, 2021

• #8

LittleInch

Petroleum

Mar 27, 2013

23,042

GB

This is from ASM B 31.3.

Most bevels you see machined into pipe is probably 37.5 degrees with a small flat root as it is easy to cut or bevel.

But you do need to specify it on the pipe data sheet.

As the diagram says - these are "typical" - but they are a general ROT for the petrochem industry at least.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

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• Feb 5, 2021

• #9

david339933

Industrial

Jun 15, 2011

1,204

CA

The pipe manufacturer must provide finished ends per the applicable pipe spec. Usually beveled for smaller thin pipe and square cut for larger/thicker pipes.

Same goes for BW fittings....ASME B16.9 has dimensions for bevels.

 

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• Feb 5, 2021

• #10

kingnero

Mechanical

Aug 15, 2009

1,783

BE

0707 said:

kinginero

of course it depends on the thikness but the usual is whate I said

Click to expand...

Should have mentioned location or region also as a contributing factor, apart from material and welding process...
The range 60° - 70° is what is used outside the USA, seldom any more.

 

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