D1.1: Pipe from plate and WPS qualification

[gluz]

Dear collegues,

I'd like your opinion in the following PQR qualification:

AWS D1.1 2010 states in annex K that a pipe has to be made according to a pipe product specification.

Is annex K informative only and not mandatory?

Is it possible to make a tubular joint out of two pipes that in turn were made from A572 plate(grade not important) but not made into a pipe product specification?

 

[gtaw]

I just read through Annex K and saw nothing that indicated round hollow sections, i.e., tubulars, had to be manufactured to a pipe specification. Nor does it state that pipe has to be manufactured to a pipe specification. Maybe your edition is different than mine.

Best regards - Al

 

[Duwe6]

Pipe = pressure-retaining round hollow round stuff, which is a subset of

HSS = hollow structural sections [not usually able to retain pressure.

 

[Kiwi2671]

Al,
Excerpt from Annex K

*pipe. Hollow circular cross section produced or manufactured
in accordance with a pipe product specification.
See tubular

Gluz,
Clearly states under the heading Annex K "For information Only"

Regards,
Kiwi

 

[Kiwi2671]

Sorry,
Hit Post before finished,
Cheers,
Kiwi

*tubular. A generic term that refers to sections including
pipe products (see pipe) and the family of square,
rectangular, and round hollow-section products produced
or manufactured in accordance with a tubular
product specification. Also referred to as hollow
structural section (HSS)

 

[gluz]

Thanks guys for you input.

Kiwi,

Annex K clearly states that its informative only. On the other hand, it says that those definitions (tubular , pipe) are "defined as they relate to this code."

So, do we need a pipe that was made into a pipe specification to qualify a WPS (respecting AWS definition of pipe), or can we simply make a pipe from a plate(no specification) but using the plate's specification(group II), thus ignoring the definition(because it's informative).

 

[gtaw]

Structural plate is rolled to form round hollow sections all the time. They refer to it as pipe.

As for the definition contained in AWS D1.1:2010; check it again. Unless you and I have different editions, mine edition says, "Pipe. Tubular-shaped product of circular cross section. See tubular."

Is your copy of D1.1 an American printed copy or a knock-off printed in China? Not trying to be a wise guy, just that some of the foreign translations are not the same.

There is no reference to meeting a pipe specification.

The definition you included in your post differs from the definition I copied from the D1.1:2010 I recently received from AWS. Are you sure you are looking at the 2010 edition? I even checked the 2004 edition and the definition is exactly the same as the one I included. I went back to the 1979 edition of D1.1, but there is no definition of pipe in that edition.

Best regards - Al

 

[gluz]

GTAW,

I have no doubts that a round hollow section made from plate is a pipe. The question is whether AWS views it the same way when WPS qualification is taken into consideration.

The company I'm working now does not have a printed copy of AWS D1.1, so I'm reading it from a digital copy(don't remember the source). It's 2010 for sure and not translated and it says the same as already posted by kiwi2671. Could you scan this page for us?

 

[Kiwi2671]

Hi Al,
Something strange going on here.
My copy (hard copy and digital)of AWS D1.1 2004 Annex B Terms and definitions has the exact statement you have noted (no mention of pipe specification)
My copy (hard copy and digital) of AWS D1.1 2010 Annex K Terms and Definitions has exactly what I have cut and pasted above - a lot different to 2004.
Regards,
Kiwi

 

[Kiwi2671]

Mystery solved

2010 Technical Revisions

Annex K-Added new term for "shelf bar" and modified term for "NDT" to relate to the context of the Dl code only.
The term "machine welding" was deleted and replaced with the standard term "mechanized welding" in the annex and
throughout the code. The definitions for "tubular" and "pipe" have also been modified.

Sure your copy isn't from China Al ? LOL !!
Regards,
Kiwi