This is a support structure for 90 T platform. The drawing calls for CHS (circular hollow section) ABS AH/DH36 various diameters.
We wanted to use API 5L x52 as by yield strentgh this pipe may be substituted with CHS ABS AH/DH36.
The question is clear with ASTM A106 pipe, but what about API one then if the YS's are same?
thank you for the email
best regards,
Elshan.
From: pgoswami@quickclic.net
To: materials-welding@googlegroups.com
CC: elshan_f@hotmail.com
Subject: [MW:0] MW: 5964-ASTM A106/API5L X 52 pipe to use instead ABS AH36/dh36
Date: Wed, 14 Jul 2010 22:29:54 -0400
Elshan,
I have attached quite relevant information on ABS-AH-36 steel which would help you. This steel is a micro-alloyed C-Mn steel, which may be procured either with TMCP (Thermo Mechanical Controlled Processed) or in Q&T condition.
This steel is manufactured to ASTM A-131/A131M specification ( see page 9 of this attachment) as Grade AH-36 steel. ABS adopted the same ASTM specification and renamed the materials as ABS AH-36 steel.
Please check the test certificates of the material (in case you have received the same) whether they're supplied with TMCP or Q&T. If with TMCP then ASME SA-841(Steel Plates with TMCP) is the preferred replacement for this material . Alternatively ASTM A-131 grade could be chosen also.
ASME SA-841 grade comes in 3 grades , e.g. Grade A,B,C, and with 2 classes , such as Class 1 (Y.S 310-345 Mpa) and Class 2 (Y.S -380-415 Mpa).If the replacement is plate to plate then either SA-841 Grade A/B/C (Grade B preferred due to Moderate "C:-0.15%) Class 2 or ASTM A-131 would be preferred.
ASME SA-841 is adopted in Sec-IX-2010 edition (see below). Although this alloy is classified as under P1, Group 2 and 3, using straightforward E-7018 or E-7018-1 would not be recommended for this steels. It's preferred to choose E-8018 D1 or 8018-G SMAW electrodes for welding of this steel. Electrodes with "G" spec may meet the exact base metal chemistry, but as per SFA 5.5. impact test requirements has to be worked out by the supplier and user. From that aspect E-8018 D1 electrodes are quite straightforward.
I presume your main concern is on replacement material for AH-36 steel, then the above info would be of help.Generally for structural or any design yield strength is very important, as this is the staring point of material failures. Hence the material chosen should have the Y.S equal or more AH-36 steel. None of the piping mentioned below meet this requirement.
I am not very clear on piping material being used for platforms. Is AH-36 being rolled to pipes?? Or what the exact specification of piping material specified in your drawing??
Could you please provide those info.
Thanks.
Pradip Goswami,P.Eng.
Welding & Metallurgical Engineer/Specialist
Ontario Power Generation Inc.
Email-pgoswami@sympatico.ca,
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Elshan Feyzullayev
Sent: Monday, July 12, 2010 11:22 PM
To: materials-welding@googlegroups.com
Subject: RE: [MW:5964] FW: ASTM A106/API5L X 52 pipe to use instead ABS AH36/dh36
Dear Pradip,
This is exactly the same material that you have attached.
It is evident that AH/DH36 has min yield strength 355 mpa. But ASTM A106/API x52 has min yield strength 240 mpa. Therefore ASTM A106/ API X52 can not substitute AH/DH 36.
What role does yield strength play in the structural construction then?
best regards,
From: pgoswami@quickclic.net
To: materials-welding@googlegroups.com
Subject: [MW:5956] FW: ASTM A106/API5L X 52 pipe to use instead ABS AH36/dh36
Date: Mon, 12 Jul 2010 19:19:02 -0400
Elshan,
It's very difficult to get information on steels of ABS specifications as they're proprietary. However I dug out these information. Let me know if your project involves:-
· The same ABS specifications
· Is it the same AH36 material, you're talking about.
· Would it be convenient from your end to email the applicable part/portions of ABS specs.
I am asking the above in order to make sure that I would be able to advice on the correct spec and materials.
Thanks.
Pradip Goswami,P.Eng.
Welding & Metallurgical Engineer/Specialist
Ontario Power Generation Inc.
Email-pgoswami@sympatico.ca,
From: Elshan Feyzullayev [mailto:elshan_f@hotmail.com]
Sent: Monday, July 12, 2010 1:12 AM
To: pgoswami@quickclic.net
Subject: RE: ASTM A106/API5L X 52 pipe to use instead ABS AH36/dh36
Hi Pradip,
No it is not resolved yet. Could you please advise? And I would like to know what is the role of yield strength on structural and piping construction?
many thanks in advance.
Elshan.
From: pgoswami@quickclic.net
To: elshan_f@hotmail.com
Subject: RE: ASTM A106/API5L X 52 pipe to use instead ABS AH36/dh36
Date: Sun, 11 Jul 2010 22:15:35 -0400
Hi Elshan,
I missed your email. Is this problem resolved, if not I can dig out the information for you.
Appreciate your response.
Thanks
Pradip Goswami,P.Eng.
Welding & Metallurgical Engineer/Specialist
Ontario Power Generation Inc.
Email-pgoswami@sympatico.ca,
From: Elshan Feyzullayev [mailto:elshan_f@hotmail.com]
Sent: Tuesday, June 08, 2010 12:44 AM
To: pgoswami@quickclic.net
Subject: ASTM A106/API5L X 52 pipe to use instead ABS AH36/dh36
Dear Pradip,
I have got the project here a fabrication of the structural platform. The pipe supports are required to be ABS AH36/DH 36 which is minimum yield strength is required to be 355 MpA.
Can we substitute this structural pipe with ASTM A106 Gr B/ASTM A333/API 5L X52 pipe?
Could you please be so kind to give me a detailed information about it?
Thank you in advance.
Best regards,
Elshan Feyzullayev.
Baku, azerbaijan.
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THIS MESSAGE IS ONLY INTENDED FOR THE USE OF THE INTENDED RECIPIENT(S) AND MAY CONTAIN INFORMATION THAT IS PRIVILEGED, PROPRIETARY AND/OR CONFIDENTIAL. If you are not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying, conversion to hard copy or other use of this communication is strictly prohibited. If you are not the intended recipient and have received this message in error, please notify me by return e-mail and delete this message from your system. Ontario Power Generation Inc.
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