GB 5135.8-2003 Automatic sprinkler system—Part 8:Accelerator

GB 5135.1-2003 Automatic sprinkler system—Part 1:Sprinkler GB 5135.2-2003 Automatic sprinkler system—Part 2:Wet system alarm valves、retard chamber、water motor alarm GB 5135.3-2003 Automatic sprinkler system—Part 3:Water mist nozzles GB 5135.4-2003 Automatic sprinkler system—Part 4:Dry pipe valves GB 5135.5-2003 Automatic sprinkler system—Part 5:Deluge alarm valves GB 5135.6-2003 Automatic sprinkler system—Part 6:Convention valve GB 5135.7-2003 Automatic sprinkler system—Part 7:Water flow indicator

GB 5135.2-2003 Automatic sprinkler system—Part 2:Wet system alarm valves、retard chamber、water motor alarm GB/T 528-1998 Rubber,vulcanized or thermoplastic—Determination of tensile stress-strain properties GB/T 528-2009 Rubber,vulcanized or thermoplastic—Determination of tensile stress-strain properties GB/T 531-1999 Rubber—Determination of indentation hardness by means of pocket hardness meters GB/T 531.1-2008 Rubber,vulcanized or thermoplastic—Determination of indentation hardness—Part 1:Duromerer method(Shore hardness) GB/T 531.2-2009 Rubber,vulcanized or thermoplastic—Determination of indentation hardness—Part 2:IRHD pocket meter method GB/T 3098.1-2000 Mechanical properties of fasteners—Bolts, screws and studs GB/T 3098.1-2010 Mechanical properties of fasteners—Bolts,screws and studs GB/T 3098.2-2000 Mechanical properties of fasteners—Nuts—Coarse thread GB/T 3098.2-2015 Mechanical properties of fasteners—Nuts GB/T 3098.3-2000 Mechanical properties of fasteners—Setscrews GB/T 3098.3-2016 Mechanical properties of fasteners—Set screws GB/T 3287-2000 Malleable cast iron pipe fittings GB/T 3287-2011 Malleable cast iron pipe fittings GB/T 3512-2001 Rubber, vulcanized or thermoplastic—Accelerated ageing and heat resistance tests—Air-oven method GB/T 3512-2014 Rubber, vulcanized or thermoplastic—Accelerated ageing and heat resistance tests—Air-oven method GB/T 3287-2024 Malleable cast iron pipe fittings GB/T 3098.2-2025 Mechanical properties of fasteners—Part 2:Nuts