ASTM A36 plates

[Moin - QC]

Dear members,

Can a plate to ASTM A36 can be used to manufacture TEEs to A234 WPB, is there any restriction in BPV or B31.3 on the use of A36 plate for manufacturing A234 Tees.

One of client says A36 is for general purpose and cannot be used for making a pressure containing component to be used in oil and gas production . Is it correct, if yes why? And if not can you please provide me a technical justification, I could not find anything B31.3.

Thanks & Regards
Syed Moin                               

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[manpreet]

Dear Moin,

Yes, your client is correct, A36  is a commonly known as structural plate with poor grain structure and should not be used for pressure vessels,

Why not try SA516, there is not much cost difference.


Regards
Manpreet Singh





On Mon, 24 Jan 2011 19:11:41 +0530 "Moin - QC" wrote

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[KRISHNASAMY MASANAM]

Dear Moin!
                      A36is carbon steel for general structural purposes and also A234 is wroyght carbon steel with Chromium (for forming stable matel carbides at the grain boundaries and the strong increase in corrosion resistances). Molybdenum (used in steels alloys for its high corrosion resistace and weldablity), Nickel (for instance, the austenite structure of iron is stabilized. This crystal structure makes such steels  less brittle at low temperatures) etc., these items are missing in A36. So your client statement is correct...        

Thanks & Best regards

 

Krishnasamy. M

Welding Inspector

Fize Al- Shammary Gen. Cont. Est.

Kingdom of Saudi Arabia.

Mob: +966 592823768

 

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Date: Tue, 25 Jan 2011 02:14:55 +0000
To: material...@googlegroups.com
Subject: Re: [MW:9443] ASTM A36 plates
From: manpre...@rediffmail.com

[Moin - QC]

Dear Krishnasamy,

 

Thanks for the information but is there any restriction in code B31.3 or BPV

 

REGARDS,
SYED MOIN

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[krishnasamy masanam]

Dear Moin!

                   Please see ASME 31.3 Chapter III  (Materials and specification) 323.1, 323.2, etc., has listed, Listed and unlisted materials.  Normally  A 36 will not meets A234 chemical, mechanical properties,If your project specification included A 36 material for fittings then you can use other wise you cannot use that SA 36 instead of SA 234

[Plate Steel]

Dear Syed,

Firstly A36 is just one common carbon structural steel,this steel plate can make common tanks,but not pressure vessels.Because,As a professional steel supplier,we knew when rolling A36,no need to do Ultrasonic test,but for pressure vessel used steel,they have to be done Ultrasonic test.

Second,your said A234 is one pressure vessel steel,actually another pressure vessel steel ASTM A285GrC is similar to A234.

It would be dangerous if using A36 to replace of A234,Freind.

Eric from XINSTEEL INDUSTRIAL CO.,LTD

在 2011年1月24日星期一 UTC+8下午9:36:28，Moin - QC写道：

[Abhay Pethe]

SA-36 is permitted for use in construction of pressure vessels according to UCS-6 of the ASME BPVC. Practically nobody uses the same remains the fact.

No comments regarding the equivalency or use of A36 in place of A234.

Best Regards,

Abhay Pethe

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