orientation of weld seam in large dia. pipes

[JIJILAL K M]

Dear Friends,

We 're having large dia . pipe fab & welding. 30",44",50.

pipe is helical seam welded .construction code is ASME 31.1. Here is a concern about weld seam orientation what should be the minimum distance between two weld seam ?

please advice

K.M. JIJILAL,

[george....@gr.bureauveritas.com]

There is no requirement or restriction in the Code for a minimum distance between 2 welds.
The Code is not a handbook, you have to implement basic metallurgy and sound engineering judgement


best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS PIRAEUS - GREECE

Tel: +30 210 40 63 113 /4 /5
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04
This message contains confidential information. To know more, please click on the following link: http://disclaimer.bureauveritas.com

[Chetan Kapadia]

Dear K.M. JIJILAL,

Please note as follow:

LSAW PIPES:

•  As per API 5L for pipes including & over 36" OD pipes 2 weld seams are permitted & shall be preferably separated by 180 degree.
  
• As per IS 3589 specification pipes including & over 32" OD, 2 weld seams are permitted by mutual agreement regarding additional NDT for ground seam.

HELICAL SEAMS PIPES

• In helical pipes as per API 5L SKELP weld is defined as minimum separation as 300mm length.
• Also at the joint of coils the cutting of the length is planned to avoid skelp weld.
• There is limitation on pipes dia. & separation permitted.
• No idea regarding "pipe is helical seam welded .construction code is ASME 31.1"

You will find details in API Spec. 5L.

Hope above will assist in arriving at rational decision, but definitely take customer agreement by sending attachment.  

Best Regards,
C.B.KAPADIA
0091 98926 33442

---

From: JIJILAL K M <jijil...@gmail.com>
To: material...@googlegroups.com
Sent: Tuesday, 5 January 2016 2:03 PM
Subject: [MW:24059] orientation of weld seam in large dia. pipes

--
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-weld...@googlegroups.com.
To post to this group, send email to material...@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAHmEnHihxfXD%3DzCueDPTeEU8-eJrCr5NV2ARnU0_ZgGDzhH0sA%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.

[anand gupta]

As per aramco std. Required min distance 25 mm or 3 times of wall thk whichever is greater. as per goog engg. Practice keep maximum distance. a p gupta saudi Sent from Yahoo Mail on Android

From:"JIJILAL K M" <jijil...@gmail.com>

Date:Tue, 5 Jan, 2016 at 11:49 AM

Subject:[MW:24059] orientation of weld seam in large dia. pipes