2　Normative References

The following normative documents contain provisions which，through reference in this text，constitute provisions of this Standard.For dated references，all subsequent amendments（not including the erratum）or revisions do not apply to this Standard.However，parties who reach agreements based on this Standard are encouraged to investigate the possibility of applying the latest editions of these documents.For any undated references，the latest version shall apply to this Standard.

GB/T 983　　　　　Stainless steel covered electrodes

GB/T 985.1—2008　　　　　Recommended joint preparation for gas welding，manual metal arc welding，gas-shield arc welding and beam welding

GB 4053.1　　　　　Safety requirements for fixed steel ladders and platform-Part 1：Steel vertical ladders

GB 4053.2　　　　　Safety requirements for fixed steel ladders and platform-Part 2：Steel inclined ladders

GB 4053.3　　　　　Safety requirements for fixed steel ladders and platform-Part 3：Industrial guardrails and steel platforms

GB/T 4842　　　　　Argon

GB/T 5117　　　　　Carbon steel covered electrodes

GB/T 5118　　　　　Low alloy steel covered electrodes

GB/T 5293　　　　　Carbon steel electrodes and fluxes for submerged arc welding

GB/T 8110　　　　　Welding electrodes and rods for gas shielding arc of carbon and low alloy steel

GB/T 8923.2　　　　　Preparation of steel substrates before application of paints and related products-Visual assessment of surface cleanliness-Part 2：Preparation grades of previously coated steel surface after localized removal of previous coatings

GB/T 10045　　　　　Carbon steel flux cored electrodes for arc welding

GB/T 12470　　　　　Low-alloy electrodes and fluxes for submerged arc welding

GB/T 14957　　　　　Steel wires for melt welding

GB/T 17853　　　　　Stainless steel flux cored wires

GB/T 8241.4　　　　　Rubber lining-Part 4：Flue gas desulphurization lining.

GB 50128　　　　　Code for construction and acceptance of vertical cylindrical steel welded storage tanks

GB 50236　　　　　Code for construction and acceptance of field equipment，industrial pipe welding engineering

DL/T 679　　　　　Code for welder technical qualification

DL/T 868　　　　　Code of welding procedure qualification

DL/T 869　　　　　The code of welding for power plant

DL 5009.1　　　　　Code of safety operation in power engineering construction-Part 1：Thermal power plants

DL/T 5072　　　　　Code for Designing insulation painting of thermal power plant

HGJ 32—1990　　　　　Chemical processing equipment of rubber lining

HG/T 2537　　　　　Carbon dioxide for welding

HG/T 2640　　　　　Application specifications for glass flake lining

HG/T 3797　　　　　Mortar of glass flake lining

HG 20202　　　　　Specification for construction and acceptance of degreasing work

JB 4730　　　　　Nondestructive testing of pressure-bearing equipment

JB/T 4735　　　　　Steel welded atmospheric pressure vessels

JB/T 4736　　　　　Reinforcement pad

SJ/T 10743　　　　　Tungsten-cerium electrodes for inert gas shielded arc welding，plasma welding and cutting