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API Spec 20B Open Die Shaped Forgings for Use in the Petroleum and Natural Gas Industry, First Edition, Includes Errata (2013)
standard by American Petroleum Institute, 04/01/2013
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API SPECIFICATION 20B FIRST EDITION, APRIL 2013
ERRATA: DECEMBER 2013
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Open Die Shaped Forgings for Use in the Petroleum and Natural Gas Industry
This API standard specifies requirements for the qualification and production of open die shaped forgings for use in API service components in the petroleum and natural gas industries when referenced by an applicable equipment standard or otherwise specified as a requirement for compliance.
This API standard is applicable to equipment used in the oil and natural gas industries where service conditions warrant the use of individually shaped open die forgings, including rolled rings. Examples include pressure containing or load bearing components. Forged bar, rolled bar, and forgings from which multiple parts are removed are beyond the scope of this specification.
This API standard establishes requirements for four forging specification levels (FSL). These four FSL designations define different levels of forged product technical, quality and qualification requirements.
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
API Specification 6A, Twentieth Edition, Specification for Wellhead and Christmas Tree Equipment ASTM A370 1, Standard Test Methods and Definitions for Mechanical Testing of Steel Products ASTM A388/A388M, Standard Practice for Ultrasonic Examination of Steel Forgings
ASTM A604, Standard Practice for Macroetch Testing of Consumable Electrode Remelted Steel Bars and Billets
ASTM E10, Standard Test Method for Brinell Hardness Test of Metallic Materials ASTM E18, Standard Test Method for Rockwell Hardness Test of Metallic Materials ASTM E45, Standard Test Method for Determining the Inclusion Content of Steel
ASTM E110, Standard Test Method for Indentation Hardness of Metallic Materials by Portable Hardness Testers
ASTM E112, Standard Test Method for Determining Average Grain Size
ASTM E165, Standard Practice for Liquid Penetrant Examination for General Industry
ASTM E381, Standard Method of Macroetch Testing Steel Bars, Billets, Blooms and Forgings
1 ASTM International, 100 Barr Harbor Drive, West Conshohocken, Pennsylvania 19428, www.astm.org.
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