ISO, API, ASTM, ANSI, JIS, DIN, BS & GB Standards.

      ANSI Valve Standards
     American National Standards Institute - ANSI - valve standards.

      API Valve Standards
     An overview of the American Petroleum Institute - API - valves standards.

      ASME Valve Standards
     An overview of The American Society of Mechanical Engineers - ASME - valve standards.

      BS - British Standard Valves 
     An overview of British - BS - valve standards.

      Chinese and International Valve Standards
     Chinese valve standards compared with the international ISO, ASTM , ASME, ANSI, MSS, API and JIS standards.

      Chinese Valve Standards
     Chinese standards for steel, cast iron and metal valves.

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