CJ/T 217-2005 Compound quick air inbreathe-release valve for water supply pipeline

CJ/T 217-2013 Compound quick air inbreathe-release valve for water supply pipeline

GB/T 3280-2015 Cold rolled stainless steel plate, sheet and strip GB/T 6739-1996 Determination of film hardness by pencil test GB/T 6739-2006 Paints and varnishes—Determination of film hardness by pencil test GB/T 6739-2022 Paints and varnishes—Determination of film hardness by pencil test GB/T 7306.2-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 2:Taper internal and external threads GB/T 8923.1-2011 Preparation of steel substrates before application of paints and related products—Visual assessment of surface cleanliness—Part 1:Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings GB/T 8923.2-2008 Preparation of steel substrates before application of paints and related products—Visual assessment of surface cleanliness—Part 2:Preparation grades of previously coated steelsubstrates after localized removal of previous coatings GB/T 8923.3-2009 Preparation of steel substrates before application of paints and related products—Visual assessment of surface cleanliness—Part 3:Preparation grades of welds,edges and other areas with surface imperfections GB/T 8923.4-2013 Preparation of steel substrates before application of paints and related products—Visual assessment of surface cleanliness—Part 4:Initial surface conditions,preparation grades and flash rust grades in connection with high-pressure water jetting GB/T 9286-1998 Paints and varnishes—Cross cut test for films GB/T 9286-2021 Paints and varnishes—Cross-cut test GB 9969.1-1998 General principles for preparation of instructions for use of industrial products GB/T 12220-1989 General purpose industrial valves—Marking GB/T 12220-2015 Industrial valves—Marking 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 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 13927-1992 Pressure testing for general purpose valves GB/T 13927-2008 Industrial valves—Pressure testing GB/T 13927-2022 Industrial valves—Pressure testing GB/T 16589-1996 Rubber, vulcanized—Classification—Rubber materials GB/T 17219-1998 Standard for safety evaluation of equipment and protective materials in drinking water system GB/T 17219-2025 Hygienic safety evaluation of distribution equipment,protective materials and treatment materials in drinking water system GB/T 17241.6-1998 Integral cast iron pipe flanges GB/T 17241.6-2008 Integral cast iron flanges GB/T 17241.7-1998 Specifications for cast iron pipe flanges HG/T 3091 JB/T 308-2004 Valves model designation method JB/T 7928-2014 Industrial Valve Supply Requirements JB/T 7928-1999 JBT 7928-1999 General valve Supply requirements