API SPEC 6A : 2018
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Specification for Wellhead and Tree Equipment, Twenty-First Edition
Hardcopy , PDF
08-10-2020
English - Chinese
11-21-2018
This specification identifies requirements and gives recommendations for the performance, dimensional and functional interchangeability, design, materials, testing, inspection, welding, marking, handling, storing,shipment, and purchasing of wellhead and tree equipment for use in the petroleum and natural gas industries.
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