ASTM A999 for Alloy and Stainless Steel Pipe

ASTM A999 / A999M - 16 Standard Specification for General Requirements for Alloy and Stainless Steel Pipe.

This specification(Footnote 2) covers a group of general requirements that, unless otherwise specified in an individual specification, shall apply to the ASTM product specifications noted below.

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

The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore each system is to be used independently of the other without combining values in any way. The inch-pound units apply unless the "M" designation (SI) of the product specification is specified in the order.

Note:Footnote 2 - For ASME Boiler and Pressure Vessel Code applications see related Specification SA 999 in Section II of that Code.