ASTM A999 Standard Specification for General Requirements for Alloy and Stainless Steel Pipe

ASTM A999 Standard Specification for General Requirements for Alloy and Stainless Steel Pipe

ASTM A999 Standard Specification covers a group of general requirements that, unless otherwise specifified in an individual specifification, shall apply to the ASTM product specififications noted below. 

In the case of conflflict between a requirement of a product specifification and a requirement of this specifification, the product specifification shall prevail. In the case of conflflict between a requirement of the product specifification or a requirement of this specifification and a more stringent requirement of the purchase order, the purchase order shall prevail.

The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. The inch-pound units apply unless the “M” designation (SI) of the product specifification is specifified in the order. NOTE 1—The dimensionless designator NPS (nominal pipe size) is used in this standard for such traditional terms as “nominal diameter,” “size,” “nominal bore,” and “nominal size.” 

The following precautionary statement pertains only to the test method portion, Section 22, of this specifification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.