GB/T 47394-2026 Flue gas condensing heat recovery unit for gas-fired heating boilers

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 2589-1990 General principles for calculation of total production energy consumption GB/T 2589-2008 General principles for calculation of the comprehensive energy consumption GB/T 2589-2020 General rules for calculation of the comprehensive energy consumption GB 3096-1993 Standard of environmental noise of urban area GB 3096-2008 Environmental quality standards for noise 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 9124.1-2019 Steel pipe flanges—Part 1:PN designated GB/T 9969-2008 General principles for preparation of instructions for use of industrial products GB 9969.1-1998 General principles for preparation of instructions for use of industrial products GB/T 10071-1988 Measurement method of environmental vibration of urban area GB 12348-1990 Standard of noise at boundary of industrial enterprises GB/T 13610-2003 Analysis of natural gas by gas Chromatography GB/T 13610-2014 Analysis of natural gas composipion—Gas chromatography GB/T 13610-2020 Analysis of natural gas composition—Gas chromatography GB/T 27698.1-2011 Test method for the performance of heat exchangers and heat exchange element—Part 1:General requirements GB/T 27698.1-2023 Test methods for the performance of heat exchangers and heat exchange elements—Part 1:General requirements GB 50041-2020 Code for design of boiler plant GB 50264-2013 Code for design of industrial equipment and pipeline insulation engineering GB/T 50726 CJJ/T 34-2022 Design standard for urban heating network CJJ/T 247-2016 Technical specification for noise and vibration control of heating station HG/T 20592 NB/T 47013.2-2015 Non-destructive testing of pressure equipment - Part 2: Radiographic testing NB/T 47013.3-2023 Non-destructive testing of pressure equipment - Part 3: Ultrasonic testing NB/T 47015-2023 Stress vessel welding procedure NB/T 47066-2018 Condensation boiler thermal performance test method QB/T 4008-2022 Polytetrafluoroethylene Unfused Tape for Thread Sealing (Raw Material Tape) QB/T 4008-2010 Thread seal tape (raw material tape) made of polytetrafluoroethylene SH/T 3022-2011 Design specification for anticorrosion coating of equipment and piping in petrochemical engineering