Its specifications and standards mainly fall into several categories:
1. Petroleum equipment design and manufacturing;
2. Use and maintenance of petroleum equipment;
3. Drilling and oil production operations.
Imported valve API standard code API standard name
API SPEC 6D API 6D (16th Edition) Pipeline Valve Specification Appendix 1
API STD 6D Steel gate valves, plug valves, ball valves and check valves for pipelines
API STD 6D drill flanged steel gate and plug valves
API SPE 14D safety valve for offshore platforms
API 526 flanged steel safety valve
API 527 Metal--Tightness of metal-sealed safety valves
ANSI/API 527-1991 Seat Tightness of Safety Relief Valves
API 528 safety valve nameplate
API 529 Flanged Malleable Iron Plug Valves
ANSI/API 589-1993 Fire Test for Evaluation of Valve Stem Packing
API 594 Wafer Check Valve
API 595 flanged cast iron gate valve
API 597 Flanged or butt welded steel reduced port gate valves
API 598 Valves Inspection and Testing
API 599 Flanged or butt welded steel plug valves
API 600 Flanged or Butt Welded Steel Gate and Plug Valves for Refinery Use
API 600-2009 Steel gate valves - flanged and butt welded ends, bolted bonnet Steel gate valves - flanged and butt welded ends, bolted bonnet
API 602 Small Carbon Steel Gate Valve for Refinery Use
API 603 150 pound thin wall corrosion resistant gate valve for refinery
ANSI/API 603-2001 Class 150, Cast, Corrosion-Resistant, Flanged-End Gate Valves
API 604 flanged ductile iron gate valve
API 607 Fire resistance test of soft sealing surface ball valves
ANSI/API 607-1993 Fire Test for Soft-Seated Quarter-Turn Valves
ANSI/API 608-2002 Metal Ball Valves - Flanged and Butt-Welding Ends
API 609 Butterfly Valve (<=150 lbs, <=150oF)
ANSI/API RP 11V 7-1990 Repair, Testing and Setting Gas Lift Valves
ANSI/API 621-2001 Reconditioning of Metallic Gate valves, Globe valves, and Check Valves