Category
Valves
Subcategory
Isolation Valve
Applicable standards
11
Issuing bodies
5
Description
Bolted-bonnet gate valve for on/off isolation service (cast or forged steel).
Applicable Standards (11)
API — 6 standards
API 600
Steel Gate Valves — Flanged and Butt-Welding Ends, Bolted Bonnets
Bolted-bonnet steel gate valves with flanged or butt-weld ends, NPS 2 and larger. Identical to ISO 10434.
Key requirements (6)
- Bolted-bonnet steel gate valves for petroleum and natural gas.
- Designs: outside-screw-and-yoke (OS&Y) rising stem, wedge or parallel-slide gate.
- Wall thickness ≥ ASME B16.34 plus API 600 Table 1 minimums (more conservative).
- Trim numbers: API Trim 5 (13Cr stem/disc), Trim 8 (Stellite-faced), etc. per Table H.
- Hydrotest per API 598 (shell, backseat, low-pressure air seat, high-pressure water seat).
- Body-bonnet joint: ring joint (RTJ) or pressure-sealed bonnet for higher classes.
API 603
Corrosion-Resistant, Bolted Bonnet Gate Valves — Flanged and Butt-Welding Ends
Stainless and corrosion-resistant gate valves, lighter-weight than API 600.
API 602
Gate, Globe, and Check Valves for Sizes DN 100 (NPS 4) and Smaller for the Petroleum and Natural Gas Industries
Compact (small-bore) carbon steel valves for petroleum, petrochemical and gas service.
Key requirements (5)
- Gate, globe, check valves NPS ≤ 4 (DN 100), Class 800–4500 (compact body).
- For instrument tubing, isolation, drains, vents in process plant.
- Forged body construction.
- Bolt-bonnet, welded-bonnet or pressure-sealed bonnet.
- Hydrotest per API 598.
API 598
Valve Inspection and Testing
Inspection, examination, supplementary examinations and pressure-test requirements for valves.
Key requirements (5)
- Valve inspection and testing — covers the test requirements referenced by other valve standards.
- Tests: shell (high-pressure water), backseat (where applicable), low-pressure pneumatic seat, high-pressure hydrostatic seat, optional high-pressure pneumatic seat.
- Allowable leakage: zero for resilient-seated; small allowable rate for metal-seated (Table 6).
- Test duration: minimum hold times by valve size.
- Visual examination during pressurization.
API 622
Type Testing of Process Valve Packing for Fugitive Emissions
Type testing of valve stem packing material for fugitive emission performance (low-E packing).
Key requirements (7)
- Type testing of process valve packing for fugitive emissions.
- Test temperature: 260 °C (500 °F) typical.
- Test cycles: 1510 mechanical cycles + 5 thermal cycles.
- Leakage acceptance: ≤ 100 ppmv methane (or per spec).
- Materials qualified: graphite, PTFE, flexible-graphite die-formed.
- Mating shaft surface finish: typically Ra ≤ 0.4 µm (16 µin).
- Drives selection of low-emission packing for VOC service.
API 624
Type Testing of Rising Stem Valves Equipped with Graphite Packing for Fugitive Emissions
Fugitive emission type testing for rising-stem valves with graphite packing.
Key requirements (7)
- Type testing of rising-stem valves equipped with graphite packing for fugitive emissions.
- Test temperature: 260 °C; pressure: 600 psi typical.
- Cycles: 310 mechanical + 3 thermal.
- Leakage acceptance: ≤ 100 ppmv methane.
- Applies to gate, globe, parallel-slide and similar valves.
- References API 622 packing requirements.
- Used to qualify entire valve assembly, not just packing.
ASME — 2 standards
ASME B16.34
Valves — Flanged, Threaded, and Welding End
Pressure-temperature ratings, dimensions, materials, NDE, marking and testing for valves.
Key requirements (7)
- Pressure–temperature ratings for valves (steel).
- Pressure classes: 150, 300, 400, 600, 900, 1500, 2500, 4500.
- Body wall thickness: t = (P·d)/(2·S·E − 1.2·P) + c, plus tabulated minimums.
- Hydrotest: shell at 1.5 × Class 100 °F rating; seat at 1.1 × Class 100 °F rating.
- Special class allows 25% above standard rating with stricter NDE (radiography + hardness).
- Materials per ASME II Part D allowable stress.
- End connections: threaded, flanged, butt-weld, socket-weld.
ASME B16.10
Face-to-Face and End-to-End Dimensions of Valves
Standard face-to-face and end-to-end dimensions for valves.
ISO — 1 standard
ISO 15848 (series)
Industrial valves — Measurement, test and qualification procedures for fugitive emissions
International fugitive-emission test for industrial valves (Type test and Production test).
BSI — 1 standard
BS 1873
Steel globe and globe stop and check valves for petroleum, petrochemical and allied industries
Legacy British globe valve standard.
BIS — 1 standard
IS 14846
Sluice Valves for Water Works Purposes (50 to 1200 mm size)
Cast iron sluice (gate) valves for waterworks.