API 602: Gate, Globe, and Check Valves for Sizes DN 100 and Smaller

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API 602 standard specifies the requirements for a series of compact gate valve, compact globe valve and compact check valves for petroleum and natural gas industry applications.

API 602 is applicable to valves of:

Sizes:

— nominal diameter sizes DN 8, DN 10, DN 1 5, DN 20, DN 25, DN 32, DN 40, DN 50, DN 65, DN 80, and DN 100;

— corresponding to nominal pipe sizes NPS 1 / 4 , NPS 3 / 8 , NPS 1 / 2 , NPS 3 / 4 , NPS 1, NPS 1 1 / 4 , NPS 1 1 / 2 , NPS 2, NPS 2 1 / 2 , NPS 3, and NPS 4.

Pressure Ratings:

It is also applicable to pressure designations of Class 150, Class 300, Class 600, Class 800, and Class 1500.

Class 800 is not a listed class designation, but is an intermediate class number widely used for socket welding and threaded end compact valves.

Valve Characteristics:

It includes provisions for the following valve characteristics:

— outside screw with rising stems (OS & Y), in sizes 8 ≤ DN ≤ 1 00 ( 1 / 4 ≤ NPS ≤ 4) and pressure designations including Class 800;

— inside screw with rising stems (ISRS), in sizes 8 ≤ DN ≤ 65 ( 1 / 4 ≤ NPS ≤ 2 1 / 2 ) and pressure designations of classes ≤ 800;

— socket welding or threaded ends, in sizes 8 ≤ DN ≤ 65 ( 1 / 4 ≤ NPS ≤ 2 1 / 2 ) and pressure designations of Class 800 and Class 1500;

— flanged or butt-welding ends, in sizes 1 5 ≤ DN ≤ 1 00 ( 1 / 2 ≤ NPS ≤ 4) and pressure designations of Class 1 50 through Class 1 500, excluding flanged end Class 800;

— bonnet joint construction—bolted, welded, and threaded with seal weld for classes ≤ 1500 and union nut for classes ≤ 800;

— extended body, in sizes 1 5 ≤ DN ≤ 50 ( 1 / 2 ≤ NPS ≤ 2) and pressure designations of Class 800 and Class 1500;

— bellows stem seal, in sizes 8 ≤ DN ≤ 50 ( 1 / 4 ≤ NPS ≤ 2) and pressure designations of < Class 1 500;

— bellows stem seal testing requirements;

— standard and full-bore body seat openings;

— materials, as specified;

— testing and inspection.

API 602 standard is applicable to valve end flanges in accordance with ASME B1 6.5, valve body ends having tapered pipe threads to ASME B1 .20.1 , valve body ends having socket weld ends to ASME B1 6.11 and butt-weld connections per the requirements described within this standard.

If product is supplied bearing the API Monogram and manufactured at a facility licensed by API, the requirements of Annex A shall apply.

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