GB/T 40411-2021 Packaged units for supplying hot,cooling or chilled water

GB/T 3797-2016 Electrical control assemblies GB/T 5226.1-2019 Electrical safety of machinery—Electrical equipment of machines—Part 1:General requirements GB/T 7251.1-2013 Low-voltage switchgear and controlgear assemblies—Part 1:General rules BS EN 13831 GB/T 983-1995 Stainless steel covered electrodes GB/T 983-2012 Covered electrodes for manual metal arc welding of stainless and heat-resisting steels GB/T 2423.17-1993 Basic environmental testing procedures for electric and electronic products Test Ka:Salt mist GB/T 2423.17-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Test Ka:Salt mist GB/T 2423.17-2024 Environmental testing—Part 2:Test methods—Test Ka:Salt mist GB/T 3091-2001 Welded steel pipe for low pressure liquid delivery GB/T 3091-2008 Welded steel pipes for low pressure liquid delivery GB/T 3091-2015 Welded steel pipes for low pressure liquid delivery GB/T 3216-2005 Rotodynamic pumps—Hydraulic performance acceptance tests—Grades 1 and 2 GB/T 3216-2016 Rotodynamic pumps—Hydraulic performance acceptance tests—Grades 1,2 and 3 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 5117-1995 Carbon steel covered electrodes GB/T 5117-2012 Covered electrodes for manual metal arc welding of non-alloy and fine grain steels GB/T 7251.8-2005 Low-voltage switchgear and controlgear assemblies—General technology requirement for intelligent assemblies GB/T 7251.8-2020 Low-voltage switchgear and controlgear assemblies—Part 8:General technical requirements for intelligent assembly GB/T 8163-1999 Seamless steel tubes for liquid service GB/T 8163-2008 Seamless steel tubes for liquid service GB/T 8163-2018 Seamless steel pipes for liquid service GB/T 8175-1987 Guide for design of thermal insulation of equipments and pipes GB/T 8175-2008 Guide for design of thermal insulation of equipments and pipes GB/T 12241-2005 Safety valves—General requirements GB/T 12241-2021 Safety valves—General requirements GB/T 13306-1991 Plates GB/T 13306-2011 Plates 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 14976-2002 Stainless steel seamless tubes for fluid transport GB/T 14976-2012 Seamless stainless steel pipes for fluid transport GB/T 26759-2011 The technical specification for energy-saving control device for water system of central air-conditioning GB/T 29247-2012 General methods for testing the performance of industrial process measurement and control instruments NB/T 47004.1-2017 Plate Heat Exchanger Part 1: Removable Plate Heat Exchanger QB/T 4507-2013 Copper Filter for Water Heating Pipe Fittings JB/T 10394.1-2002 Painting equipment general technical specification Part 1: Sheet metal parts JB/T 4330-1999 Determination of noise emitted by refrigeranting and air conditioning equipments GB/T 3091-2025 Welded steel pipes for low pressure fluid delivery GB/T 14976-2025 Seamless stainless steel pipes for fluid transport GB/T 8175-2025 Guide for design of thermal insulation of equipments and pipes NB/T 47004.1-2025 Panel-type heat exchanger Part 1: Removable-type panel-type heat exchanger