T/CHCA 020-2023 Specification for tunnel construction wastewater treatment equipment

GB/T 191-2008 Packaging—Pictorial marking for handling of goods GB/T 700-2006 Carbon structural steels GB/T 825-1988 Eyebolts GB/T 985.1-2008 Recommended joint preparation for gas welding,manual metal arc welding,gas-shield arc welding and beam welding GB/T 1804-2000 General tolerances for linear and angular dimensions without individual tolerance indications GB 2894-1996 Safety signs GB 2894-2008 Safety signs and guideline for the use GB/T 3091-2015 Welded steel pipes for low pressure liquid delivery GB/T 3280-2007 Cold rolled stainless steel plate, sheet and strip GB/T 3797-2005 Electrical control assemblies GB/T 4171-2008 Atmospheric corrosion resisting structural steel GB/T 4208-2017 Degrees of protection provided by enclosure(IP code) GB/T 4219.1-2008 Unplasticized poly(vinyl chloride)(PVC-U) piping system for industrial applications—Part 1:Pipes GB/T 5226.1-2019 Electrical safety of machinery—Electrical equipment of machines—Part 1:General requirements GB/T 6388-1986 Transport package shipping mark GB 7231-2003 Basic identification colors and code indications and safety sign for industrial pipelines 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/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 8978-1996 GB/T 9286-2021 Paints and varnishes—Cross-cut test GB/T 9969-2008 General principles for preparation of instructions for use of industrial products GB/T 11901-1989 Water quality—Determination of suspended substance—Gravimetric method GB/T 12467-2009(所有部分) GB/T 12771-2008 Welded stainless steel pipes for liquid delivery GB/T 13306-2011 Plates GB/T 13384-2008 General specifications for packing of mechanical and electrical product GB 18613-2020 Minimum allowable values of energy efficiency and values of efficiency grades for motors GB 19517-2004 National safety technical code for electric equipments GB 19517-2009 National safety technical code for electric equipments GB 19517-2023 National technical specification for the safety of electric equipments GB/T 30790.7-2014 Paints and varnishes—Corrosion protection of steel structures by protective paint systems—Part 7:Execution and supervision of paint work GB/T 31361-2015 Anti-corrosion painting of solvent-free liquid epoxy coating CJ/T 83-1999 Inclined tube settler for water clarification CJ/T 83-2016 Inclined tube for water and wastewater treatment HG/T 4077-2009 Corrosion protection coating painting technical specification HJ 1147-2020 Water quality pH measurement using electrode method HJ/J 251-2006 HJ/T 336-2006 Environmental Protection Product Technical Requirements: Submersible Sewage Pump HJ/T 367-2007 Environmental Protection Product Technical Requirements - Electromagnetic Pipeline Flowmeter JB/T 5995-1992 JBT 5995-1992 Writing regulations for manuals for mechanical and electrical products usage NB/T 47003.1 SJ 20893-2003 GB 2894-2025 Safety colours and safety signs GB 50235-2010 Code for construction and acceptance of industrial metallic piping QC/T 846-2011 Heavy-duty flatbed transport vehicle general technical specification