Friday, July 1, 2011

Re: [MW:11564] Differance between PSL1 AND PSL2 PIPE/SHORT LENGTH JOINTES PIPE ISSUE/PSL2 CARBON STEEL PIPE

Dear MOHAMMAD SAJID ALAM ,

Length of pipes just depends upon the approved QAP by the customer.

that what is the requirment of the length of pipe.

Yes but still API 5L 44TH EDITION 2007/ISO 3183

9.11.3.3 PAGE 37

GIVEN SOME GUIDENSE BUT ALSO SAYS:

UNLESS OTHERWISE AGREED, Random lengths shall be delivered with in the tolerance limit in table 12.

YOU can refer that also

THE ACCEPTANCE CRITERIA FOR YOU REFERENCE AS PER API 5L 44TH EDITION:

FOR PLAIN END PIPE:

Random length designation

 

 

Random length designation

M(ft)

Minimum length

 

M(ft)

Minimum average length for average order length item

M(ft)

Maximum length

M(ft)

 

18(60)

6,40(21.0)

16.00(52.5)

19.81(65.0)

 

 

For joining of the pipes you have to refer Pipe Laying code API standard 1104.welding of pipe lines and related facilities.

As your acceptance lit is 12 to 18 mtrs.

but some what additional limit is also allowed in approved QAP by the customer. So just only that amount of pipe length pipes with given tolerance limits are allowed. As we are manufactures of API 5L psl1 and psl2 pipes.

we never use to join pipes and send to customers and it is also not allowed.

BUT STILL IF THE ORGANISATION WHERE YOU INSPECTING SAYING THAT THEY HAVE APPROVAL FROM CUSTOMER.

Just asked for approved QAP. AND THERE PROCEDURE FOR JOINING PIPS.

AS WHEN EVER YOU GOING TO JOIN TWO PIPES YOU NEED TO GO THROUGH WELDABILITY TEST.

IN WHICH THE STRENGTH OF THE JOINTS BETWEEN TWO PIPES CHECKED AND AFTER TESTING /APPROVEED WPS/PQR ONLY FURTHER PROCESS GOES ON.
AND IT IS NOT POSSIBLE TO JOIN TWO PIPES OTHER THAN SMAW PROCESS.

IF STILL THEY GET APPROVAL FROM CUSTOMER THEY HAVE TO GO FOR WELDABILITY TEST.

and its the first time i lessoning that customer is allowing to join two short length pipes.so just see first written approval and only go further.

AS API PIPES USE TO GET MANUFACTURE BY API5L 44TH EDITION 2007.

THIS IS THE CODE AND LATEST EDITION WHICH USE TO BE FOLLOWED BY ALL PIPE MANUFACTURING COMPINIES.

even in PSL 2 MORE THAN 5 % OF WELD LENGTH REPAIR IS NOT ALLOWED AND EVEN NOT REPAIR ON PARENT MATEL ie pipe body also not allowed.

I think You get your answer of the query.



With Regards,

Prafulla Vyas
Diploma.(QMS/IP) B.E (IP), MBA(OPR.)
Assistant Manager Welding
Essar Steel


From: "sajidalam mohd."engineer_makes_world@yahoo.co.in
Sent: Thu, 30 Jun 2011 11:55:27 +0530
To: materials-welding@googlegroups.com
Cc: Rupesh.Jambhale@mottmac-india.com
Subject: RE: [MW:11504] Differance between PSL1 AND PSL2 PIPE/SHORT LENGTH JOINTES PIPE ISSUE/PSL2 CARBON STEEL PIPE

Dear Rupesh
Thanks for your reply. I am doing inspection for CARDBON STEEL PIPES (PSL2) manufacturing by SAW method.
Ours pipes length requirement is 12 meter to 18 meter (means length should be minimum 12 meter and maximum 18 meter).
This pipe manufacturer has some short lengthpipes like 8 meter, 6 meter; 5meter etc. of same Gradeand they want to join some short length pipes by SMAW method.
After joining this short length pipes by SMAW method that pipes will be accepted in the category of PSL2 Pipe or not.
THIS TYPE OF PIPE IS ALLOW AS PER API5L/PSL2.
If yes then then what the mandatory requirements for inspection/testing of that short lengths jointed pipes.
Regards
Md Sajid ALam
Inspection Engineer

--- On Tue, 28/6/11, Jambhale, Rupesh A <Rupesh.Jambhale@mottmac-india.com> wrote:
>
>From: Jambhale, Rupesh A <Rupesh.Jambhale@mottmac-india.com>
>Subject: RE: [MW:11501] Differance between PSL1 AND PSL2 PIPE/SHORT LENGTH JOINTES PIPE ISSUE/PSL2 CARBON STEEL PIPE
>To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
>Date: Tuesday, 28 June, 2011, 11:11 AM
>
>
Dear all,
After performing major inspectionactivities on API 5 L pipes & I have clear understanding regarding Major difference between the API 5L- PSL 1 & PSL 2 Pipes.
Note:-
1) Major difference is, In case of PSL1, Impact test is not mandatory and in case of PSL2, Impact testis mandatory at minimum 0 deg C.
2)Further, in case of PSL2 there is a range of Yield Stress and Tensile Stress. In case of PSL1 there is a minimum value of Yield Stress and Tensile Stress
>3) API 5L PSL -1 is normallyused for category D or normal service fluids. i.e. cooling water,utility water, air etc services and not requiredmany of the testing requirements, where as PSL-2 pipe is used for category M fluids i.e. Hydrocarbons, Sour etc., requiring NACE compliance,hence more costly.
>
>
Also pls go thru go through the attachment & alsoAPI 5Lforbetterunderstanding.

>
Regards,
>
>Rupesh Anant Jambhale
>Pr. Engineer, Inspection Dept
>Oil, Gas and Petrochemicals (India)
>
>Mott MacDonald Pvt Ltd
>Kothari House, CTS 185
>Off Andheri Kurla Road
>Near Kohinoor Continental Hotel
>Andheri (E) Mumbai - 400 0059
>India
>
>T +91-22 30835000 (SwitchBoard)
>T +91-22 30835222 (Direct)
>F +91 22 28253779
>
>Reply to : rupesh.jambhale@mottmac-india.com
>Visit us : www.mottmac.com

>

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of sajidalam mohd.
>Sent: 28 June 2011 05:12
>To: materials-welding@googlegroups.com
>Subject: [MW:11497] Differance between PSL1 AND PSL2 PIPE/SHORT LENGTH JOINTES PIPE ISSUE/PSL2 CARBON STEEL PIPE
>

>

DEAR EXPERTS

WHAT IS DIFFERANCE BETWEEN PSL1 & PSL 2 CARBON STEEL PIPE.

I AM DOING INSPECTION FOR PSL2 CARBON STEEL PIPES (BY SAW PROSESS AS PER API5L).

OUR PIPE'S LENGTH ACCEPTANCE CRITERIA IS 12 METER TO 18 METER.

MANUFACTURER HAS SO MANY SHORT LENGTH PIPES LIKE AS 8 METER, 7 METER & 10 METER.

HE WANTS TO JOINT TWO SHORT LENGTH PIPES BY SMAW PROCESS.

I WANT TO ASK THAT IF MANUFACTURER IS JOINING TWO SHORT LENGTH PIPES THAT PIPE WILL BE ACCEPTED AS PER API5L FOR PSL2.

MANUFACTURER IS SAYINGTHEY HAVE APPROVAL FROM CLIENTS ABOUT ABOVE MENTIONED ISSUE.ME SHOULD GIVE RELEASE FOR THAT PIPES OR NOT.

IT IS ALLOW OR NOT/AND WHERE IT IS MENTIONED THAT FOR PSL2 PIPES IF LENGTH ACCEPTANCE CRITERIA IS MENTIONED BY CLIENTS/API5L AFTERTHAT MANUFACTURER WILL JOIN TWO SHORT LENGTH PIPE AND HE WILL PROCESS THAT PIPES AS PER PSL2 PIPES.

REGARDS

MOHAMMAD SAJID ALAM

INSPECTION ENGINEER

KUWAIT

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