GB/T 28185-2011 Urban heating unit with heat exchanger

GB/T 28185-2025 Heat exchange unit for urban heating

GB 151-1999 Tubular heat exchangers GB/T 151-2014 Heat exchangers GB/T 151-2026 Heat exchangers GB/Z 151-2026 Fire prevention measures on converters for high-voltage direct current(HVDC)systems,static var compensators(SVC)and flexible AC transmission systems(FACTS)and their valve halls GB/T 700-2006 Carbon structural steels GB/T 706-2006 GB/T 2887-2000 Specification for electronic computer field GB/T 2887-2011 General specification for computer field GB 3096-1993 Standard of environmental noise of urban area GB 3096-2008 Environmental quality standards for noise GB 4208-1993 Degrees of protection provided by enclosure (IP code) GB/T 4208-2008 Degrees of protection provided by enclosure(IP code) GB/T 4208-2017 Degrees of protection provided by enclosure(IP code) GB/T 5657-1995 Technical specifications for centrifugal pumps—Class Ⅲ GB/T 5657-2013 Technical specifications for centrifugal pumps(Class Ⅲ) GB 7251.1-1997 Low-voltage switchgear and control gear assemblies—Part 1:Type-tested and partially type-tested assemblies GB 7251.1-2005 Low-voltage switchgear and control gear assemblies—Part 1:Type-tested and partially type-tested assemblies GB/T 7251.1-2013 Low-voltage switchgear and controlgear assemblies—Part 1:General rules GB/T 7251.1-2023 Low-voltage switchgear and controlgear assemblies—Part 1:General rules GB 7251.2-1997 Low-voltage switchgear and control gear assemblies—Part 2:Particular requirements for busbar trunking systems(busways) GB 7251.2-2006 Low-voltage switchgear and controlgear assemblies—Part 2:Particular requirements for busbar trunking systems (busways) GB/T 7251.2-2023 Low-voltage switchgear and controlgear assemblies—Part 2:Power switchgear and controlgear assemblies GB 7251.3-1997 Low-voltage switchgear and control gear assemblies—Part 3:Particular requirements for low-voltage switchgear and control gear assemblies intended to be installed in places where unskilled persons have access for their use—Distribution boards GB/T 7251.3-2006 Low-voltage switchgear and control gear assemblies—Part 3:Particular requirements for low-voltage switchgear and control gear assemblies intended to be installed in places where unskilled persons have access for their use—Distribution boards GB/T 7251.3-2017 Low-voltage switchgear and controlgear assemblies—Part 3:Distribution boardsintended to be operated by ordinary persons(DBO) GB 7251.4-1998 Low-voltage switchgear and control gear assemblies—Part 4:Particular requirements for assemblies for construction sites(ACS) GB/T 7251.4-2006 Low-voltage switchgear and control gear assemblies—Part 4:Particular requirements for assemblies for construction sites(ACS) GB/T 7251.4-2017 Low-voltage switchgear and controlgear assemblies—Part 4:Particular requirements for assemblies for construction sites(ACS) GB/T 8163-2008 Seamless steel tubes for liquid service GB/T 8923-1988 GB/T 9112-2010 Types and parameters for steel pipe flanges 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 12233-1989 General purpose industrial valves—Casting iron globe valves and lift check valves GB/T 12233-2006 General purpose industrial valves—Casting iron globe valves and lift check valves GB/T 12233-2025 General purpose industrial valves—Casting iron globe valves and lift check valves GB/T 12236-1989 General purpose industrial valves—Steel swing check valves GB/T 12236-2008 Steel swing check valve for petroleum,petrochemical and allied industries GB/T 12236-2025 Steel swing check valve for petroleum,petrochemical and allied industries GB/T 12237-1989 General purpose industrial valves—Flanged and butt-weld end steel ball valves GB/T 12237-2007 Steel ball valves for petroleum,petrochemical and allied industries GB/T 12237-2021 Steel ball valves for petroleum, petrochemical and allied industries GB/T 12238-1989 General purpose industrial valves—Flanged and wafer butterfly valves GB/T 12238-2008 Flanged and wafer resilient seal butterfly valves GB/T 12243-2005 Spring loaded safety valves GB/T 12243-2021 Spring loaded safety valves GB/T 12459-2005 Steel butt-welding seamless pipe fittings GB/T 12668.2-2002 Adjustable speed electrical power drive systems—Part 2:General requirements—Rating specifications for low voltage adjustable frequency a.c power drive systems GB/T 12668.2-2025 Adjustable speed electrical power drive systems—Part 2:General requirements—Rating specifications for adjustable speed AC power drive systems GB/T 12706.1-2002 Power cables with extruded insulation and their accessories for rated voltages from 1kV(Um=1.2kV)up to 35kV(Um=40.5kV)—Part 1:Cables for rated voltages of 1kV(Um=1.2kV) and 3kV(Um=3.6kV) GB/T 12706.1-2008 Power cables with extruded insulation and their accessories for rated voltages from 1 kV(Um=1.2 kV)up to 35 kV(Um=40.5 kV)—Part 1:Cables for rated voltage of 1 kV(Um=1.2 kV)and 3 kV(Um=3.6 kV) GB/T 12706.1-2020 Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um=1.2 kV) up to 35 kV (Um=40.5 kV)—Part 1:Cables for rated voltage of 1 kV(Um=1.2 kV)and 3 kV(Um=3.6 kV) GB/T 12706.2-2002 Power cables with extruded insulation and their accessories for rated voltages from 1kV(Um=1.2kV) up to 35kV(Um=40.5kV)—Part 2:Cables for rated voltages from 6kV(Um=7.2kV)up to 30kV(Um=36kV) GB/T 12706.2-2008 Power cables with extruded insulation and their accessories for rated voltages from 1 kV(Um=1.2 kV) up to 35 kV (Um=40.5 kV)—Part 2:Cables for rated voltages from 6 kV(Um=7.2 kV) up to 30 kV(Um=36 kV) GB/T 12706.2-2020 Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um=1.2 kV) up to 35 kV (Um=40.5 kV)—Part 2:Cables for rated voltages from 6 kV(Um=7.2 kV) up to 30 kV(Um=36 kV) GB/T 12706.3-2002 Power cables with extruded insulation and their accessories for rated voltages from 1kV(Um=1.2kV)up to 35kV(Um=40.5kV)—Part 3:Cables for rated voltage of 35kV(Um=40.5kV) GB/T 12706.3-2008 Power cables with extruded insulation and their accessories for rated voltages from 1 kV(Um=1.2 kV)up to 35 kV(Um=40.5 kV)—Part 3:Cables for rated voltage of 35 kV(Um=40.5 kV) GB/T 12706.3-2020 Power cables with extruded insulation and their accessories for rated voltages from 1 kV(Um=1.2 kV)up to 35 kV(Um=40.5 kV)—Part 3:Cables for rated voltages of 35 kV(Um=40.5 kV) GB/T 12712-1991 The requirements for supervision of recovery of condensate from steam heating system and technique of automatic steam traps GB/T 12712-2023 Technical management requirements for condensate recovery and automatic steam traps of steam heating system GB/T 13384-1992 General specifications for packagings of mechanical and electrical products GB/T 13384-2008 General specifications for packing of mechanical and electrical product GB/T 14549-1993 Quality of electric energy supply—Harmonics in public supply network GB 16409-1996 Plate heat exchanger GB 50015-2019 Standard for design of building water supply and drainage GB 50054-2011 Code for design of low voltage electrical installations GB 50093-2013 Code for construction and quality acceptance of automation instrumentation engineering GB 50169-2016 Code for construction and acceptance of grounding connection electric equipment installation engineering GB 50174-2017 Code for design of data centers GB 50236-2011 Code for construction and acceptance of field equipment, industrial pipe welding engineering GB 50264-2013 Code for design of industrial equipment and pipeline insulation engineering CJJ/T 34-2022 Design standard for urban heating network CJ 128-2007 Heat meters CJ 128-2000 CJ 128-2000 Thermometer for heat measurement CJ/T 3047-1995 Semi-instantaneous water heater CJ/T 3047-1998 Heating Radiator - Grey Cast Iron Column Wing Type Radiator JB/T 8680.2