GB/T 12244-2025 Pressure reducing valves—General requirements

GB/T 12244-2006 General requirements for pressure reducing valves

GB/T 1047-1995 Nominal size for pipe components GB/T 1047-2005 Pipework components—Definition and selection of DN (nominal size) GB/T 1047-2019 Pipework components—Definition and selection of nominal size GB/T 1048-1990 Nominal pressure for pipe components GB/T 1048-2005 Pipework components—Definition and selection of PN GB/T 1048-2019 Pipework components—Definition and selection of nominal pressure GB/T 1176-1987 Specification for cast copper alloys GB/T 1176-2013 Casting copper and copper alloys GB/T 9124.1-2019 Steel pipe flanges—Part 1:PN designated GB/T 12220-1989 General purpose industrial valves—Marking GB/T 12220-2015 Industrial valves—Marking GB/T 12224-1989 General requirements for industrial steel valves GB/T 12224-2005 General requirements for industrial steel valves GB/T 12224-2015 General requirements for industrial steel valves GB/T 12225-1989 General purpose industrial valves—Specification of copper alloy castings GB/T 12225-2005 General purpose industrial valves—Specification of copper alloy castings GB/T 12225-2018 General purpose industrial valves—Specification of copper alloy castings GB/T 12226-1989 General purpose industrial valves—Specification of flake graphite iron castings GB/T 12226-2005 General purpose industrial valves—Specification of flake graphite iron castings GB/T 12226-2025 General purpose industrial valves—Technical specification for gray iron castings GB/T 12227-1989 General purpose industrial valves—Specification of spheroidal graphite iron castings GB/T 12227-2005 General purpose industrial valves—Specification of spheroidal graphite iron castings GB/T 12227-2025 General purpose industrial valves—Technical specification for ductile iron castings GB/T 12228-1989 General purpose industrial valves—Specification of carbon steel forgings GB/T 12228-2006 General purpose industrial valves—Specification of carbon steel forgings GB/T 12228-2025 General purpose industrial valves—Technical specification for carbon steel forgings GB/T 12229-1989 General purpose industrial valves—Specification of carbon steel castings GB/T 12229-2005 General purpose industrial valves—Specification of carbon steel castings GB/T 12229-2025 General purpose industrial valves—Technical specification for carbon steel castings GB/T 12230-1989 General purpose industrial valves—Specification of austenitic steel castings GB/T 12230-2005 General purpose industrial valves—Specification of stainless steel castings GB/T 12230-2023 General purpose industrial valves—Specification of stainless steel castings GB/T 12245-1989 Methods of performance test for pressure reducing valves GB/T 12245-2006 Methods of performance test for pressure reducing valves GB/T 12245-2025 Methods of performance test for pressure reducing valves GB/T 13819-1992 Copper alloy castings GB/T 13819-2013 Copper and copper alloy castings GB/T 15530.1-1995 Cast copper alloy integral flanges GB/T 15530.1-2008 Cast copper alloy integral flange GB/T 15530.8-1995 Specifications for copper alloy and composite flanges GB/T 17241.1-1998 Synoptic table for cast iron pipe flanges GB/T 17241.1-2024 Cast iron pipe flanges—Part 1:PN designated GB/T 21465-2008 Terminology for valves GB/T 26640-2011 Specification for minimal thickness of the shell of valves GB/T 32808-2016 Valves—Model designation method JB/T 106-2024 JB/T 106-2024 - Valve labeling and painting JB/T 106-2004 Valves marking and paint JB/T 2205-2013 The structure length of a pressure reducing valve according to JB/T 2205-2013 JB/T 2205-2000 JB/T 2205-2000 Throttling valve structural length JB/T 7928-2014 Industrial Valve Supply Requirements JB/T 7928-1999 JBT 7928-1999 General valve Supply requirements