AP5L PSL-2 are for pipeline and has very stringent requirements as compared with structural steel. It will be very difficult to get PSL-2 pipe with stockiest . My view is to select and buy PSL-1 pipe and do the required testing to meet ABS grade requirements.
Regards
On Fri, 16 Jul 2010 06:56:50 +0530 wrote
>
Elshan,
API specification
5L-2004, includes both seamless and welded pipes. Pipes may be procured with
PSL-1 and PSL-2 category, with PSL-2 being more stringent( e.g. impact test is
mandatory). Seamless pipes with PSL-2 category
would be the preferred choice. Since ABS
AH36/DH 36 is a very specific material you need to select pipes which
undergoes similar heat treatment as that of plates and have similar chemical
composition and mechanical properties.
Some of
the API pipes could have similar or better properties than ABS AH36/DH 36
(with PSL-2). Refer API
5L-2004,Table-3B
1.
X-52 –Min Y.S- 359
Mpa, Min UTS- 455 Mpa Does not meet ABS spec requirement, falls short in UTS.
2.
X-56- Min Y.S- 386
Mpa, Min UTS- 490 Mpa Exceeds the Y.S requirement but just borderline for
UTS.
3.
X-60 Min Y.S- 414
Mpa, Min UTS- 517 Mpa Exceeds the Y.S and UTS requirement. SHOULD BE
PREFERRED.
Impact Requirement
for API 5L pipes:- Test Temperature
320F(00C) or below. For a set of 3 specimens, minimum
average is 20ft-lbs (27J) for transverse specimens or 30ft-lb (41J) for
longitudinal specimens. Impact requirements shall be verified as against ABS
plates.
Chemical
Composition:- For all
X52/X56/X60 grad-- All Values below are maximum:-
·
C-0.24, Mn-1.40, P-
0.025, S-0.015, Ti-0.04, Nb+V+Ti-0.15%
Heat Treatment:-
Typically ABS plates are either Q&T or Subject to TMCP. The API pipes also
should have the same heat treatments.
API recommends the
following heat treatments (Clause 5.4) for the pipes, as –rolled, normalized,
normalized+tempered , sub critically stress relieved. X grade pipes (X-52/56/60) may be
procured in quenched and tempered condition also. You
should insist on the last requirement
I hope this would
help in your queries.
Thanks
Pradip Goswami,P.Eng.
Welding & Metallurgical
Engineer/Specialist
Ontario Power Generation Inc.
Email-pgoswami@sympatico.ca,
pgoswami@quickclic.net
From: pgoswami
[mailto:pgoswami@quickclic.net]
>Sent: Thursday, July 15, 2010 6:39
AM
>To: GOSWAMI Pradip -THERMAL
>Subject: FW: [MW:5981] MW:
5964-ASTM A106/API5L X 52 pipe to use instead ABS
AH36/dh36
Pradip
Goswami,P.Eng.
Welding &
Metallurgical Engineer/Specialist
Ontario Power
Generation Inc.
Email-pgoswami@sympatico.ca,
pgoswami@quickclic.net
From:
materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]
On Behalf Of Elshan Feyzullayev
>Sent: Thursday, July 15, 2010
2:52 AM
>To: materials-welding@googlegroups.com
>Subject: RE:
[MW:5981] MW: 5964-ASTM A106/API5L X 52 pipe to use instead ABS
AH36/dh36
Dear
Pradip,
>
>This is a support structure for 90 T platform. The
drawingcalls forCHS (circular hollow section)ABS
AH/DH36various diameters.
>We wanted to use API
5Lx52 as by yield strength this pipemay be substituted withCHS
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-131gradecould 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 â€Å"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 â€Å"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 designyield strength is very important, as
this is the staring point of material failures.Hence the material chosen should have the Y.S
equal or moreAH-36 steel. None of the piping mentioned below meet this
requirement.
I am not
very clear on piping material being usedfor 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,
pgoswami@quickclic.net
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 samematerial that you have
attached.
>
>It is evidentthat AH/DH36has 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,
pgoswami@quickclic.net
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 ofyield 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,
pgoswami@quickclic.net
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/API5LX52
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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