API 1104 Code Interpretation

[limesh M]

Dear All,


Is position an essential variable in API 1104 ? ie, If a PQR qualified
on 5G position as per API 1104 qualifies welding on ALL position or
not?

Thanks and Regards

[AGUSTIN JIMENEZ]

Hi.

 

5.4.2.4 Position

A change in position from roll to fixed, or vice versa, constitutes

an essential variable.

For all position is 6G or 5G+2G.

 

Agustin

 

---

De: limesh M <lime...@gmail.com>
Para: Materials & Welding <material...@googlegroups.com>
Enviado: sáb, junio 26, 2010 5:05:53 AM
Asunto: [MW:5750] API 1104 Code Interpretation

--
To post to this group, send email to material...@googlegroups.com
To unsubscribe from this group, send email to materials-weld...@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

 

[john rodrigues]

What about 8 inch pipe inclined at 45 degrees?


On Sun, 27 Jun 2010 17:22:24 +0530 wrote

John Rodrigues

[limesh M]

Dear Friends,

 

Still confusion in my mind.....

 

As per API 1104 clause 5.4.2.4 for welding procedure qualification, a change in position from roll to fixed,or vice versa,constitutes an essential variable.

 

In normal case,

 

Roll welding(1G) - Pipe rolling over rollers and welding carried out by automatic processes like SAW/GMAW.

Fixed (2G,5G,6G) - Normally carried out by SMAW in pipeline industry

 

So I think a change from 1G to other positions or viceversa means an essential variable.

 

I think this clause applicable to a change from 1G to other position(ie, 2G,5G,6G) or viceversa .I think we can use a WPS qualified on any position other than rolled (IG) on all positions except 1G.

 

I really don't know my way of thinking is right or wrong.Expecting some clarification from my seniors and friends in this matter.

 

 

Thanks and Regards,

 

 

Limesh

[sunil mani]

Dear Limesh,

 

Your interpretation is exactly right.

Actually API 1104 only differentiates between rolling and fixed position and not specifying all groove positions that is 1G, 2G, 5G or 6G.

So the answer to your question is:

"Yes position is an essential variable for welding procedure qualification in API 1104 but it only deals the change of rolling or fixed. Whenever you would move between rolling and fixed position of the pipe, you would have to revise the procedure qualification"