svi
Mechanical
- Aug 1, 2006
- 142
A typical client spec for CS Pipe fittings used in the Upstream Oil and Gas industry reads as, "All carbon steels, including normalised steels, used for the fabrication of fittings shall have a maximum carbon content of 0.23 %."
ASTM A234 Gr B or C, generally used, has a C content of 0.3 to 0.35 max restriction.
How can this restriction be imposed, unless a custom mill order be done with the Carbon content restricted during the steel making process.
The Procurement description of the item that comes of the material management application (Marian or the Smart Plant Materials) does not have this stated.
A generic requirement stated as an overall requirement in the client specification. I am just wondering, will this requirement get addressed to the manufacturer or supplier? The only time this would probably gets checked is when it is offered for inspection, when it is too late for any change.
An Industry standard fitting can have the C content in the range allowed by the ASTM Spec. Or, is it that the C content is invariably restricted to 0.23% irrespective of what it says in the ASTM A234, even if the component is off the shelf.
I need to see the ASTM A960 which defines the buying description for A234 and a typical MTC for a A234 fitting.
Any thoughts as to how this works out?
ASTM A234 Gr B or C, generally used, has a C content of 0.3 to 0.35 max restriction.
How can this restriction be imposed, unless a custom mill order be done with the Carbon content restricted during the steel making process.
The Procurement description of the item that comes of the material management application (Marian or the Smart Plant Materials) does not have this stated.
A generic requirement stated as an overall requirement in the client specification. I am just wondering, will this requirement get addressed to the manufacturer or supplier? The only time this would probably gets checked is when it is offered for inspection, when it is too late for any change.
An Industry standard fitting can have the C content in the range allowed by the ASTM Spec. Or, is it that the C content is invariably restricted to 0.23% irrespective of what it says in the ASTM A234, even if the component is off the shelf.
I need to see the ASTM A960 which defines the buying description for A234 and a typical MTC for a A234 fitting.
Any thoughts as to how this works out?