API SPEC 6A

Specification for Wellhead and Christmas Tree Equipment

API Specification 6A specifies 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 christmas tree equipment for use in the petroleum and natural gas industries. API Spec 6A is the modified national adoption of ISO 10423:2003, Petroleum and natural gas industries-Drilling and production equipment-Wellhead and christmas tree equipment.

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