JG/T 220-2007 Copper-aluminum column-wing type radiator

JG/T 220-2016 Copper-aluminum column-wing type radiator

JG/T 6 GB/T 985-1988 Basic forms and sizes of weld grooves for gas welding manual arc welding and gas-Shielded arc welding GB/T 985.1-2008 Recommended joint preparation for gas welding,manual metal arc welding,gas-shield arc welding and beam welding GB/T 985.2-2008 Recommended joint preparation for submerged arc welding GB/T 985.3-2008 Recommended joint preparation for gas-shield arc welding on aluminium and its alloys GB/T 985.4-2008 Recommended joint preparation for welding on clad steels GB 1576-2001 Water quality for industrial boilers GB/T 1576-2008 Water quality for industrial boilers GB/T 1576-2018 Water quality for industrial boilers GB/T 1720-2020 Circle-drawing test of coating films GB/T 1732-1993 Determination of impact resistance of film GB/T 1732-2020 Determination of impact resistance of coating films GB/T 2828.1-2003 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 2828.1-2012 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 3190-1996 Wrought aluminium and aluminium alloys—Chemical composition limits GB/T 3190-2008 Wrought aluminium and aluminium alloy——Chemical composition GB/T 3190-2020 Chemical composition of wrought aluminium and aluminium alloys GB 5237.1-2004 Wrought aluminium alloy extruded profiles for architecture—Part 1:Untreated profiles GB/T 5237.1-2008 Aluminium alloy extruded profiles for architecture—Part 1:Mill finish profiles GB/T 5237.1-2017 Aluminium alloy extruded profiles for architecture—Part 1:Mill finish profiles GB/T 7307-2001 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads GB/T 13754-1992 Test method of thermal output of heat emittor GB/T 13754-2008 Test methods of thermal output of heating radiators GB/T 13754-2017 Test methods of thermal output of heating radiators GB/T 17791-1999 Specification for seamless copper tube for air conditioning and refrigeration field service GB/T 17791-2007 Seamless copper tube for air conditioner and refrigeration equipment GB/T 17791-2017 Seamless copper and copper alloys tube forair conditioner and refrigeration equipment HG/T 3729-2004 Radio frequency-based physical field water treatment equipment technical specifications HGJ 223-1992 Technical specification for welding copper and copper alloys