[MW:23348] RE: 23347] Grade of MATERIAL

Ask to see the original pipe mill certificates and check that the manufacturer has supplied the material, and certificated it to the requirements of API 5L grade X52. [There is a lot more than just yield strength in supply of a certain grade of line pipe.] and yes, you are right, the material, as specified, is permitted to have a range of yield strength.

 

Alan Denney

AKD Materials Consulting Ltd

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ali Asghari
Sent: 26 August 2015 09:34
To: materials-welding@googlegroups.com
Subject: [MW:23347] Grade of MATERIAL

 

Dear All.
In material specification such as API 5L, minimum yield strength specified (in some cases maximum yield strength also given) that cause a wide range that overlaps with other grades.

Now with regard to attached  mechanical testing  result of some materials, contractor insist that these materials are X52(due to their wps can support them) but strength of them is near to X60 and X65.
How it could be clarified?

Regards.

---------- Forwarded message ----------
From: "Ali Asghari" <asgharialigl@gmail.com>
Date: Aug 21, 2015 7:34 AM
Subject: UNKNOWN MATERIAL
To: <materials-welding@googlegroups.com>
Cc:

Dear All.

In material specification such as API 5L, minimum yield strength specified (in some cases maximum yield strength also given) that cause a wide range that overlaps with other grades.

 

Now with regard to attached  mechanical testing  result of some materials, contractor insist that these materials are X52(due to their wps can support them) but strength of them is near to X60 and X65.

How it could be clarified?

 

Regards. 

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