API 6D Overview - Pipeline & Piping Valves [PDF]

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API 6D – Overview Sr. #



Particular



Details



1



Scope



Design, Manufacturing, Assembly, Testing & Documentation of Valves as specified in Section.2 for Pipeline & Piping Systems for Petroleum and Natural Gas Industries. Not Applicable for Valves for Subsea Applications.



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Types of Covered Valves



Gate Valves, Plug Valve, Check Valve & Ball Valves Class 150 to 600 – NPS ½ to 60



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Covered Sizes



Class 900 – NPS ½ to 48 Class 1500 – NPS ½ to 36 Class 2500 – NPS ½ to 20 Gate Valve: Class 150, 300, 400, 600 – NPS 2 to NPS 36 Class 900 & 1500 – NPS 2 to NPS 24 Class 2500 – NPS 2 to NPS 12 Plug Valve: Class 150 – NPS 2 to NPS 24 Class 350,400 & 600 – NPS 2 to NPS 36 Class 900 – NPS 2 to NPS 16 Class 1500 & 2500 – NPS 2 to NPS 12



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Available Face to Face & End-toEnd Dimensions



Ball Valves (Full Bore & Reduced Bore): Class 150 & 300 – NPS 2 to NPS 36 Class 400 & 600 – NPS 2 to NPS 36 Class 900 & 1500 – NPS 2 to NPS 36 Class 2500 – NPS 2 to NPS 12 Check Valves (Full Opening & Reduced Openings) Class 150, 300, 400 & 600 – NPS 2 to NPS 36 Class 900, 1500 – NPS 2 to NPS 24 Class 2500 – NPS 2 to NPS 12 Check Valves (Single & Dual Plate, Wafer Types) Class 150, 300,400, 600, 900, 1500 – NPS 2 to NPS 24 Class 2500 – NPS 2 to NPS 12 *The F2F dimensions shall be from ASME B16.10 for the sizes not available in Tables in Annex C and so marked in Nameplate of the valve.



5



Applicable Materials



Not Specified in Specification. The material shall be agreed between Manufacturer and Purchaser. Design Standard - API 6D Design Calculations for Pressure Containing Elements - Internationally Recognized Standards Pressure Temperature Ratings - ASME B16.34 (ASME B16.5 for Class 400)



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Reference Specifications



Sizes - API 6D Face-to-Face & End-to-End Dimensions - API 6D End Connections: Flanged Ends - ASME B16.5 (Up to NPS 24, except 22) , MSS-SP-44 (NPS 22) or ASME B16.47 Series A (Above NPS 26) Welding Ends – ASME B16.25



Prepared By: Nilesh Mistry ([email protected])



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Threads for Drain Connection – ASME B1.20.1(Taper) or ISO 228-1(Parallel) Sizes for Threaded Drain Connections – API 6D Actuator Sizing & Mounting Kits – API 6DX Fire Type Testing (Optional) – API 6FA, API 6FD, API 607 or ISO 10497 Material Tests: Tensile Tests – ASTM A370 or ISO 6892-1 Toughness/Impact/V-Notch Tests – ASTM A370 or ISO 148-1 Impact Testing for Bolting Material – ASTM A320 Sour Service (Optional) – NACE MR0175, NACE MR 0103 or ISO 15156 Chemical Composition Requirements of Carbon Steel & Austenitic Stainless Steel Welding Ends – API 6D Requirements for Dimension, Pressure & Temperature Measuring Equipment – API 6D Heat Treatment Equipment Requirements – API 6D NDE of Repair – API 6D Annex G Requirements for NDE Personnel – ASNT-SNT-TC-1A or ISO 9712 Requirements for Visual Examination Personnel – ASNT-SNT-TC-1A Requirements for Welding Inspectors – AWS QC1 Requirements for Visual Inspection of Castings – MSS-SP-55 Pressure Testing Requirements – API 6D Leakage Allowance in Hydro Seat Test – ISO 5208 Coating/Painting Requirements – API 6D Marking – API 6D, MSS-SP-25 Shipment Requirements – API 6D Minimum Documentation Requirements – API 6D Minimum Facility Requirements – API 6D Tolerance for Face-to-Face & End-to-End Dimensions - ± 1.5 mm/0.06 in. (Up to NPS 10) & ± 3.00mm/0.12 in. (NPS ≥ 10) Flanged Ends: Maximum Flange Misalignment – 2mm / 0.079in. (Up to NPS 4), 3mm / 0.118in. (Above NPS 4) Parallelism of Aligned Flange Faces – Angular Alignment – 2.5 mm/m (0.03 in./ft) Maximum Total Allowable Misalignment of Holes – 2 mm / 0.079 in. (For Up NPS 4), 3 mm / 0.118 in. (Above 4 in.) Parallelism of Surface of Nut Bearing Area at the Back Face of the Flange – Within 1 Degree. 7



Other Specified Requirements



Welding Ends: Outside Profile of Heavy Wall Body – Tapered at 30 Degree & Then to 45 Degree as specified in ASME B16.25 Acceptance (Conforming to) – ASME B31.3, ASME B31.4 or ASME B31.8 Drains – Drilled or Threaded Maximum Force required at Handwheel or Wrench to apply breakaway torque – 80 lbf (360 N) Size for Wrenches – No longer than Twice the Face-to-Face or End-to-End Dimensions Maximum Diameter of Handwheel – 40 in. (1065 mm)



Prepared By: Nilesh Mistry ([email protected])



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Direction of Closing – Clockwise Impact Testing for the Welding on Valves with the design temperature below : -20° F (-29° C). NDE Requirements (Optional) – Annex G Testing: Fluid Temperature for testing – Below 38°C Chloride Content in Testing Water – Max. 30 ppm Shipment: Plug, Ball, Reverse Acting Through-Conduit Gate Valve – Fully Open Condition Other Gate Valves – Fully Closed Position



Prepared By: Nilesh Mistry ([email protected])



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