API 5LD - Weld OVerlay Pipe, NDE requirements

[DOKKU AJAY]

Dear Experts,   Kindly go through the below case and the query. Your interpretaion of the requirement of API 5LD will be helpful.   Case:   We have to weld overlay on the inside of 36" NPS pipe (7 Mtr Long) with Inconel 625. Minimum 2 layers to be deopisted for final CRA thickness of 3.2mm minimum.   The Pipe is having a Long seam and is in accordance with API 5L PSL2.   My Query:   1. Whethter these overlayed pipes can be considered as Welded Clad Pipe? If yes, then   2. Whether the radiogrpahy in accordance with Clause 11.1.1 of API 5LD is to be done throughtout the length of the long seam before weld overlay or after weld overlay.   3. When the 36" NPS pipe is supplied by other vendor with radiogrpahy as per API 5L PSL2 and the weld overlay is done by us on the inside of the pipe, does the clasue 11.2 of API 5LD is applicable in this case.   3. What all NDE is applicable in this case. Regards,   Dokku Ajay Kumar

[Prakash Hegde]

Hi! My interpretation is as given in RED   Regards   Hegde P.B. --- On Sat, 15/9/12, DOKKU AJAY <akd...@yahoo.com> wrote:

From: DOKKU AJAY <akd...@yahoo.com> Subject: [MW:15315] API 5LD - Weld OVerlay Pipe, NDE requirements To: material...@googlegroups.com Date: Saturday, 15 September, 2012, 7:24 PM

Dear Experts,   Kindly go through the below case and the query. Your interpretaion of the requirement of API 5LD will be helpful.   Case:   We have to weld overlay on the inside of 36" NPS pipe (7 Mtr Long) with Inconel 625. Minimum 2 layers to be deopisted for final CRA thickness of 3.2mm minimum.   The Pipe is having a Long seam and is in accordance with API 5L PSL2.   My Query:

1. Whethter these overlayed pipes can be considered as Welded Clad Pipe? If yes, then (Yes it is welded pipe)   2. Whether the radiogrpahy in accordance with Clause 11.1.1 of API 5LD is to be done throughtout the length of the long seam before weld overlay or after weld overlay.(Its Long seam is required to be RT before overlay ,This is  to ensure defect free joint  to take care of its strength point of view And after overlay its not mandatory, howevr This joint is RT tested to check  for  soundness of joint from crack point of view only in Overlay As overlay is not considered for strength but only corrosion resistance)   3. When the 36" NPS pipe is supplied by other vendor with radiogrpahy as per API 5L PSL2 and the weld overlay is done by us on the inside of the pipe, does the clasue 11.2 of API 5LD is applicable in this case.( In this case if vendor has supplied with RT then you need not  go for Re RT  of joint)   3. What all NDE is applicable in this case.( For Overlay you can go for LPT and chemistry of overlayed as per spec.) Regards,   Dokku Ajay Kumar -- 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   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.

[Muhammed Ibrahim PK]

Please see the answer against the query.

 

On 15 September 2012 16:54, DOKKU AJAY <akd...@yahoo.com> wrote:

Dear Experts,   Kindly go through the below case and the query. Your interpretaion of the requirement of API 5LD will be helpful.   Case:   We have to weld overlay on the inside of 36" NPS pipe (7 Mtr Long) with Inconel 625. Minimum 2 layers to be deopisted for final CRA thickness of 3.2mm minimum.   The Pipe is having a Long seam and is in accordance with API 5L PSL2.   My Query:   1. Whethter these overlayed pipes can be considered as Welded Clad Pipe? If yes, then

A: Pipe will be considered as weld overlayed pipe.

2. Whether the radiogrpahy in accordance with Clause 11.1.1 of API 5LD is to be done throughtout the length of the long seam before weld overlay or after weld overlay.

A: No. Pipe manufacturer performs RT of weld seam. If not done, you have to perform.

3. When the 36" NPS pipe is supplied by other vendor with radiogrpahy as per API 5L PSL2 and the weld overlay is done by us on the inside of the pipe, does the clasue 11.2 of API 5LD is applicable in this case.

   A: No 

3. What all NDE is applicable in this case.

   A : PT shall be performed on each layer of weld verlay (1st Layer & 2nd Layer). 

[Ashish Pathrabe]

Dear Experts:

 

Query:-
a) If WPS & PQR are qualified in INCONEL Overlay  in Single Layer (4-5mm) .After machining it will b 3.00 mm
 
b) Is it Qualified for Multi layer Overlay/Cladding.
 
PLs , guide with Reference code.
 
With regards,
Ashish P

[Prakash Hegde]

Hi! My interpretation is given in red Regards Hegde P.B. --- On Thu, 20/9/12, Ashish Pathrabe <darka...@gmail.com> wrote:

From: Ashish Pathrabe <darka...@gmail.com> Subject: Re: [MW:15349] API 5LD - Weld OVerlay Pipe, NDE requirements To: material...@googlegroups.com

Date: Thursday, 20 September, 2012, 2:46 PM

Dear Experts:   Query:- a) If WPS & PQR are qualified in INCONEL Overlay  in Single Layer (4-5mm) .After machining it will b 3.00 mm( Please confirm/ ensure from Spec and client  , does overlay of pipe require machining to maint 3mm as You will not be able to get the required chemistry in single layer  in such case you require to weld in multilayer Generaly unless ask the pipe overlay is not being machined Single layer PQR does not qualify for double layer Please refer ASME secIX   b) Is it Qualified for Multi layer Overlay/Cladding.Double layer PQR qualifies for any no of multi layer

[vdthuan]

Dear Ashish P

Your welder is qualified for multi layer base on QW-453 section IX, ” T qualified to un limit” and see note 1,

 

Best Regards,

Vu Duc Thuan

Phone: +84(0) 983 017 936

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Ashish Pathrabe
Sent: Thursday, September 20, 2012 4:17 PM
To: material...@googlegroups.com
Subject: Re: [MW:15349] API 5LD - Weld OVerlay Pipe, NDE requirements

 

Dear Experts:

[Ashish Pathrabe]

Dear Mr. Vu Duc Thusn,

QW-453 shows a Nominal Base Metal Thickness Qualified (T ).

My query is :-
1) Whether Single layer weld (Consisits of 4mm) PQR Qualifies for
Double layer.(Consists of 4mm)

With Regards,
Ashish P