Valve Standards Reference

Complete guide to industrial valve standards - API, ASME, BS, IS, IBR, MSS, ISO with scope and specifications

Showing 40 standards

API Standards (American Petroleum Institute)

Standard	Title	Scope / Application	Size Range	Pressure Class
API 600	Steel Gate Valve (Bolted Bonnet)	Bolted bonnet, flexible wedge, OS&Y. For petroleum and natural gas industries. ISO 10434 equivalent.	NPS 1 – 24	Class 150 – 2500
API 602	Forged Steel Gate, Globe & Check	Compact forged steel valves. Threaded, socket-weld, or flanged ends. Small bore piping.	NPS ¼ – 4	Class 150 – 2500
API 603	Cast Bronze Gate Valve	Bronze body, union bonnet. Class 125. Non-corrosive service.	NPS ¼ – 3	Class 125
API 6D	Pipeline & Piping Valves	Pipeline valves: ball, gate, check, plug. For pipeline transportation systems.	NPS ½ – 60	Class 150 – 2500
API 608	Metal Ball Valve	Metal seated ball valves. Flanged, butt-weld, threaded ends. Quarter-turn.	NPS ½ – 24	Class 150 – 2500
API 609	Butterfly Valve (Lug & Wafer)	Lug and wafer type butterfly valves. Concentric and double offset.	NPS 2 – 80	Class 150 – 600
API 594	Check Valve (Wafer & Lug)	Wafer, wafer-lug, and double-flanged check valves. Swing, dual plate, tilt.	NPS 2 – 60	Class 150 – 2500
API 598	Valve Inspection & Testing	Inspection and testing requirements. Shell hydrostatic, seat closure, pneumatic tests.	All Sizes	All Classes
API 607	Fire Safe Test (Quarter-Turn)	Fire safe testing for ball and butterfly valves. Post-fire leakage testing.	All Sizes	All Classes
API 6FA	Fire Test for Valves	Fire testing for API 6D pipeline valves. Full body fire test.	All Sizes	All Classes
API 623	Steel Globe Valve	Bolted bonnet globe valves. For petroleum and natural gas industries.	NPS 2 – 12	Class 150 – 2500
API 526	Safety Relief Valve	Flanged safety relief valve. Orifice letters A-T. Set pressure 15-6250 psig.	1" – 8"	Class 150 – 2500
API 527	Seat Tightness	Seat tightness requirements for pressure relief valves. Leak rate criteria.	All Sizes	All Classes

ASME Standards (American Society of Mechanical Engineers)

Standard	Title	Scope / Application	Size Range	Pressure Class
ASME B16.1	Cast Iron Flanges & Fittings	Gray iron flanges and fittings. Class 25, 125, 250.	NPS ¼ – 24	Class 25, 125, 250
ASME B16.5	Pipe Flanges (NPS ½ – 24)	Steel pipe flanges and flanged fittings. Complete dimensional requirements.	NPS ½ – 24	Class 150 – 2500
ASME B16.10	Face-to-Face Dimensions	Face-to-face and end-to-end dimensions for flanged and butt-weld valves.	All Sizes	All Classes
ASME B16.34	Valves (Flanged, Threaded, WE)	Pressure-temperature ratings, dimensions, materials, testing. Master valve standard.	All Sizes	Class 150 – 2500
ASME B16.47	Large Diameter Steel Flanges	Large diameter steel pipe flanges. NPS 26 – 60. Series A (MSS SP-44) and Series B (API 605).	NPS 26 – 60	Class 75 – 900
ASME B16.25	Butt-Welding Ends	Preparation of butt-welding ends for valves and fittings.	All Sizes	All Classes
ASME B16.11	Forged Fittings (SW/Threaded)	Socket-welding and threaded forged fittings. Valves also use these end connections.	NPS ¼ – 4	Class 2000 – 9000
ASME B16.42	Ductile Iron Flanges	Ductile iron pipe flanges and flanged fittings. Class 150 and 300.	NPS 1 – 24	Class 150, 300
ASME Section VIII	Boiler & Pressure Vessel	Rules for pressure vessels. Includes safety valve requirements.	All Sizes	All Classes

BS Standards (British Standards)

Standard	Title	Scope / Application	Size Range	Pressure Rating
BS 1414	Steel Wedge Gate Valve	Steel wedge gate valves with bolted bonnet. For petroleum industry.	DN 15 – 600	PN 20 – 420
BS 1868	Steel Check Valve	Steel check valves with bolted bonnet. Swing and lift types.	DN 15 – 600	PN 20 – 420
BS 1873	Steel Globe & Stop-Check	Steel globe and globe stop-check valves with bolted bonnet.	DN 15 – 600	PN 20 – 420
BS 5153	Cast Iron Check Valve	Cast iron check valves for general purpose.	DN 15 – 600	PN 16
BS 5163	Resilient Seated Gate Valve	Resilient seated gate valves for water services.	DN 50 – 600	PN 10/16
BS 5351	Steel Ball Valve	Steel ball valves for petroleum industry. Full and reduced bore.	DN 15 – 300	PN 20 – 420
BS 6755	Testing of Valves	Part 1: Production testing. Part 2: Fire type-testing.	All Sizes	All Classes
EN 1092-1	European Flanges (Steel)	European standard for steel flanges. PN designated.	DN 10 – 2000	PN 6 – 400

MSS Standards (Manufacturers Standardization Society)

Standard	Title	Scope / Application	Size Range	Pressure Class
MSS SP-6	Standard Finishes	Standard surface finish requirements for valve contact faces.	All Sizes	All Classes
MSS SP-25	Standard Marking System	Standard marking system for valves. Required markings.	All Sizes	All Classes
MSS SP-61	Pressure Testing	Hydrostatic pressure testing requirements for steel valves.	All Sizes	All Classes
MSS SP-67	Butterfly Valves	Butterfly valves, wafer and lug type.	NPS 2 – 72	Class 150/300
MSS SP-70	Cast Iron Gate Valves	Cast iron gate valves, flanged ends.	NPS 2 – 24	Class 125/250
MSS SP-80	Bronze Gate, Globe & Check	Bronze valves, threaded ends. Class 125 and 200.	NPS ¼ – 4	Class 125/200
MSS SP-81	Stainless Steel Knife Gate	Stainless steel, bonnetless knife gate valves.	NPS 2 – 24	Class 150/300
MSS SP-44	Steel Pipe Flanges	Steel pipe flanges for NPS 12 – 24.	NPS 12 – 24	Class 75 – 600

ISO & IS Standards

Standard	Title	Scope / Application	Size Range	Pressure Rating
ISO 5208	Pressure Testing	Industrial valves pressure testing. Leakage rates A through F.	All Sizes	All Classes
ISO 10434	Bolted Bonnet Gate Valves	Bolted bonnet steel gate valves. Equivalent to API 600.	DN 25 – 600	PN 20 – 420
ISO 17292	Metal Ball Valves	Metal ball valves for petroleum and related industries.	DN 10 – 500	PN 20 – 420
IS 778	Bronze Gate, Globe & Check	Bronze valves for water works. Class 1 and 2.	DN 8 – 100	Class 1/2
IS 14846	Sluice Valve (Water)	Resilient seated sluice valves for water supply.	DN 50 – 600	PN 10/16
IS 5312	Butterfly Valve	Butterfly valves for waterworks applications.	DN 50 – 1200	PN 6 – 25

IBR (Indian Boiler Regulations) - Mandatory for India

All valves used in boiler systems in India must have IBR certification. Required for: steam valves, boiler feed water valves, blow-down valves, safety valves, steam traps, water level gauges.

Design Approval - By Chief Inspector of Boilers (CIB)
Material - With Mill Test Certificates from approved sources
Manufacturing - Inspected by authorized Boiler Inspector
Testing - Hydrostatic test witnessed by Inspector
Stamping - IBR stamp applied after approval
Documentation - Form III-C certificate issued

Quick Reference

Pressure Classes

ASME150-2500

PNPN10-400

Size Ranges

Small¼" – 4"

Standard1" – 24"

Large26" – 60"

Temperature

Cryogenic-196°C

Standard-29°C to +425°C

High Tempup to 650°C

End Connections

FlangedRF, RTJ, FF

Butt WeldBW, SW

ThreadedNPT, BSPT

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