GB/T 25020.2-2010 Steel pole for overhead contact system of electrified railway—Part 2:Square shape tube steel pole

GB/T 25020.1-2010 Steel pole for overhead contact system of electrified railway—Part 1:Lattice pole GB/T 25020.3-2010 Steel pole for overhead contact system of electrified railway—Part 3:Steel tube pole GB/T 25020.4-2010 Steel pole for overhead contact system of electrified railway—Part 4:H section pole

GB/T 25020.2-2016 Steel pole for overhead contact system of electrified railways— Part 2:Square steel tube pole

GB/T 700-2006 Carbon structural steels GB/T 709-2006 Dimension,shape,weight and tolerances for hot-rolled steel plates and sheets GB/T 2694-2003 Transmission line tower—Technical requirements for manufacturing GB/T 4956-2003 Non-magnetic coatings on magnetic substrates—Measurement of coating thickness-Magnetic method GB/T 470-1997 Zinc ingots GB/T 470-2008 Zinc ingots GB/T 1591-1994 High strength low alloy structural steels GB/T 1591-2008 High strength low alloy structural steels GB/T 1591-2018 High strength low alloy structural steels GB/T 3181-1995 Color standard for paint film GB/T 3181-2008 Colour standard for paint film 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 5118-1995 Low alloy steel covered electrodes GB/T 5118-2012 Covered electrodes for manual metal arc welding of creep-resisting steels GB/T 5210-1985 Determination of adhesion of coats—Pull-off test GB/T 5210-2006 Paints and varnishes—Pull-off test for adhesion GB/T 5293-1999 Carbon steel electrodes and fluxs for submerged arc welding GB/T 5293-2018 Solid wire electrodes,tubular cored electrodes and electrode/flux combinations for submerged arc welding of non alloy and fine grain steels GB/T 8110-1995 Welding wires for gas shielding arc welding of carbon and low alloy steels GB/T 8110-2008 Welding electrodes and rods for gas shielding arc welding of carbon and low alloy steel GB/T 8110-2020 Wire electrodes and weld deposits for gas shielded metal arc welding of non alloy and fine grain steels GB/T 9286-1998 Paints and varnishes—Cross cut test for films GB/T 9286-2021 Paints and varnishes—Cross-cut test GB/T 9761-2008 Paints and varnishes—Visual comparison of the colour of paints GB/T 11374-1989 Thermal spraying coating—Nondestructive methods for measurement of thickness GB/T 11374-2012 Thermal spraying coating—Nondestructive methods for measurement of thickness GB 12470-1990 Fluxes for the submerged arc welding of low alloy steel GB/T 12470-2003 Low-alloy steel electrodes and fluxes for submerged arc welding GB/T 12470-2018 Solid wire electrodes,tubular cored electrodes and electrode/flux combinations for submerged arc welding of creep-resisting steels GB/T 13452.2-1992 Paints and varnishes—Determination of film thickness GB/T 13452.2-2008 Paints and varnishes—Determination of film thickness GB/T 13912-2002 Metallic coatings—Hot dip galvanized coatings on fabricated iron and steel articles—Specifications and test methods GB/T 13912-2020 Metallic coatings—Hot dip galvanized coatings on fabricated iron and steel articles—Specifications and test methods GB 50205-2001 Code for acceptance of construction quality of steel structures