api 6d overview - pipeline & piping valves
TRANSCRIPT
Prepared By: Nilesh Mistry ([email protected]) Page 1 of 3
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.
2 Types of Covered Valves Gate Valves, Plug Valve, Check Valve & Ball Valves
3 Covered Sizes
Class 150 to 600 – NPS ½ to 60
Class 900 – NPS ½ to 48
Class 1500 – NPS ½ to 36
Class 2500 – NPS ½ to 20
4 Available Face to Face & End-to-
End Dimensions
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
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.
6 Reference Specifications
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)
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
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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
7 Other Specified Requirements
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.
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)
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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