API 6A Drilling Manifolds

AT Engineering Solutions Ltd design and supply Choke and Kill, Mud Standpipe, Cement and Mud Pump Room Manifolds. Designed and supplied in accordance with the following specifications, where applicable or to meet client requirements and are supplied fully certified by independent third party authorities.

API 16C Specification for Choke & Kill Systems
API RP53 Recommended Practice for Blow Out Prevention Systems for Drilling Wells
NPD/NMD Norwegian Petroleum Directorate / Norwegian Maritime Directorate
API 6A Specification for Wellhead and Christmas Tree Equipment
NACE MR-01-75 Sulphide Stress Cracking Resistant Metallic Materials for Oilfield Equipment
NORSOK Norwegian Offshore Sector

Pressure & Temperature Ratings
Max Working Pressure 5,000 PSI 7,500 PSi 10,000 PSI 15,000 PSI 20,000 PSI
Test Pressure 7,500 PSI 11,250 PSI 15,000 PSI 22,500 PSI 30,000 PSI
Production Spec Levels 1, 2, 3 & 4 1, 2, 3 & 5 1, 2, 3 & 4 1, 2, 3 & 4 1, 2, 3 & 4
Product Rating 1 & 2 2 & 2 1 & 2 1 & 2 1 & 2
API Temperature Rating K (-60 Deg C) K (-60 Deg C) K (-60 Deg C) K (-60 Deg C) K (-60 Deg C)
To To To To To
Y (+345 Deg C) Y (+345 Deg C) Y (+345 Deg C) Y (+345 Deg C) Y (+345 Deg C)
Material Requirements
Material Class Body, Bonnet, End and outlet Connections Pressure Controlling Parts
AA - General Service Carbon or Low Alloy Steel Carbon or Low Alloy Steel
BB - General Service Carbon or Low Alloy Steel Stainless Steel
DD - Sour Service** Carbon or Low Alloy Steel* Carbon or Low Alloy Steel*
EE - Sour Service** Carbon or Low Alloy Steel* Stainless Steel*

*In accordance with NACE MR-01-75
**As defined in NACE MR-01-75

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