استاندارد ASTM A1099

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Standard Specification for Modified Alloy Steel Forgings, Forged Bar, and Rolled Bar Commonly Used in Oil and Gas Pressure Vessels

استاندارد مشخصه آلیاز های فولادی ریخته گری شده ، میله های ریخته گری شده  و میله های مورد استفاده در مخازن تحت فشار در صنایع نفت و گاز

۱٫ Scope
This specification covers modified high-strength alloy
steel forgings and rolled and forged bar for oil and gas pressure
vessels and oilfield equipment. See Appendix X1. Oil and gas
product specifications for which this material is intended
include, but are not limited to, the following:
API 6A Specification for Wellhead and Christmas
Tree Equipment and Errata,
API RP 6AR Recommended Practice for Repair and
Remanufacture of Wellhead and Christmas Tree Equipment,
API 16A Specification for Drill-Through Equipment,
API 16R Specification for Marine Drilling Riser
Couplings,
API 17D Specification for Subsea Wellhead and Tree
Equipment and Errata,
API 8C Specification for Drilling and Production
Hoisting Equipment.
Supplementary requirements are provided for use when
additional testing or inspection is desired. These shall apply
only when specified individually by the purchaser in the order.
In the case of conflict between a requirement of this
specification and a requirement of referenced general
specifications, this specification takes precedence. 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 or contract, the purchase
order or contract take precedence. The purchase order or
contract requirements shall not take precedence if they, in any
way, violate the requirements of the product specification or
this specification, for example, by the waiving of a test
requirement or by making a test requirement less stringent. In
the case of conflict in terminology between API standards and
Terminology A941, Terminology A941 definitions shall be
applied.

۱٫۴ Units—The values stated in either SI units or inchpound
units are to be regarded separately as standard. 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 nonconformance
with the standard.
This specification is expressed in both inch-pound units
and in SI units; however, unless the purchase order or contract
specifies the applicable M specification designation (SI units),
the inch-pound units shall apply.
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.
This international standard was developed in accordance
with internationally recognized principles on standardization
established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations
issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.

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