Main Valve Test Standard

MAIN VALVE INSPECTION AND TESTING STANDARDS

API 598 VALVE INSPECTION AND TEST

The most widely used test specification in the world. The standard covers all types of valves (soft & metal seated) in sizes up to 600NB (NPS 24). It also includes leakage rates and testing criteria for metal-seated and resilient seated valves.

API6D PIPELINE VALVES TEST STANDARD

Used for API6D ball valves, plug valves and API6D design pipeline check/gate valves (also now adopted as part of ISO 5208).

ISO 5208 VALVE TEST STANDARD

Incorporates an adoption of API6D test standard. Leakage rate A is specified for soft seated valves and plug valves (zero leakage*). Also includes standards for gate, globe and check valves (EN 122661-).

BS 6755 VALVE TEST STANDARD

Previously used by some European Manufacturers, now superseded by ISO 5208 (EN 12266-1) standard. It includes leakage rates and testing criteria for metal and resilient seated valves.

ASME B16.34 VALVES – FLANGED, THREADED AND WELDING END

The primary valve design standard, it also contains pressure/temperature charts for determining the working pressures of valves to be used in conjunction with other test standards, such as API 598.

ASME PTC 25 PRESSURE RELIEF DEVICES

The main reference document for the testing of pressure relief valves, PTC 25 contains detailed procedures for testing relief valves with air or steam.

API 527 SEAT TIGHTNESS OF PRESSURE RELIEF VALVES

This covers the seat tightness of pressure relief valves. It also includes allowable leakage rates for testing with steam, water and air.

FCI 70-2* CONTROL VALVE SEAT LEAKAGE

This document contains detailed test procedures and leakage rate classes for control valves. The leakage classes are also occasionally referenced by other documents and used as acceptance criteria. Supersedes ANSI B16.104. Class VI is the highest shut off class*.

ISA S75 HYDROSTATIC TESTING OF CONTROL VALVES

This standard provides a procedure for the hydrostatic shell testing of control valves. Seat testing and acceptance criteria are out of the scope of this document and usually are covered by referencing FCI 70-2.

ISO 5208 INDUSTRIAL VALVES, PRESSURE TESTING OF VALVES

ISO’s primary testing standard, this document covers all types of valves and has four levels of allowable closure test leakage rates.

MSS SP70 CAST IRON GATE VALVES, FLANGED AND THREADED ENDS

The primary design standard for cast iron gate valves, it also contains testing procedures and acceptance criteria.

MSS SP71 IRON SWING CHECK VALVES, FLANGED AND THREADED ENDS

The primary design standard for cast iron check valves also contains testing procedures and acceptance criteria.

MSS SP61* HYDROSTATIC TESTING OF STEEL VALVES

Similar to API 598 (in the case of soft seated valves) this document has some minor variations in test holding times and leakage rates. Metal seated valves the leakage can be a little higher than API598.

MSS SP78 CAST IRON PLUG VALVES, FLANGED AND THREADED ENDS

The primary design standard for cast iron plug valves also contains testing procedures and acceptance criteria.

MSS SP80, BRONZE GATE, GLOBE, ANGLE AND CHECK VALVES

The primary design standard for commodity bronze valves also contains testing procedures and acceptance criteria.

MSS SP85, CAST IRON GLOBE & ANGLE VALVES

The primary design standard for cast iron globe valves also contains testing procedures and acceptance criteria.