This standard specifies the classification, ordering content, materials, manufacturing process, technical requirements, inspection rules, packaging, marking, transportation, storage and other requirements for steel pipes used in power transmission and transformation steel structures. The types of steel pipes covered by this standard include straight seam high frequency resistance welded steel pipe (HFW), straight seam submerged arc welded steel pipe (SAWL), straight seam gas shielded welding and submerged arc welding combined welded steel pipe (COWL), spiral seam submerged arc welded steel pipe (SAWH) and seamless steel pipe (SMLS). This standard applies to equal-section steel pipes for power transmission and transformation steel pipe towers, steel pipe poles and steel pipe structure supports. Other similar steel pipe structure products using equal cross-section steel pipes can refer to this.
DL/T 1401-2015 Referenced Document
GB/T 1591 High strength low alloy structural steels*， 2018-05-14 Update
GB/T 2102 Acceptance, packaging, marking and quality certification for steel tubular products*， 2022-10-14 Update
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.1 Determination of carbon content in iron,steel and alloy
GB/T 223.10 Methods for chemical analysis of iron,steel and alloy The cupferron separation-chrome azurol S photometric method for the determination of aluminium content
GB/T 223.11 Determination of chromium content in iron, steel and alloy by visual titration or potentiometric titration
GB/T 223.12 Methods for chemical analysis of iron,steel and alloy--The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content
GB/T 223.13 Methods for chemical analysis of iron,steel and alloy The ammonium ferrous sulfate titration method for the determination of vanadium content
GB/T 223.14 Methods for chemical analysis of iron,steel and alloy The N-benzoy-N-phenylhydroxylamine extraction photometric method for the determination of vanadium content
GB/T 223.15 Chemical analysis of iron,steel and alloy--The determination of titanium by gravimetric method
GB/T 223.16 Methods for chemical analysis of iron,steel and alloy--The chromotropic acid photometric method for the determination of titanium content
GB/T 223.17 Methods for chemical analysis of iron,steel and alloy--The diantipyrylmethane photometric method for the determination of titanium content
GB/T 223.18 Methods for chemical analysis of iron steel and alloy.The sodium thiosulfate separation iodimetric method for the determination of cupper content
GB/T 223.19 Methods for chemical analysis of iron,steel and alloy--The neocuproine-chloroform extraction photometric method for the determination of copper content
GB/T 223.20 Methods for chemical analysis of iron steel and alloy.The Potentiometric titration method for the determination of cobalt content
GB/T 223.21 Methods for chemical analysis of iron steel and alloy.The 5-CL-PADAB spectrophotometric method for the determination of cobalt content
GB/T 223.22 Methods for chemical analysis of iron ,steel and alloy.The nitroso-R-salt spectrophotometric method for the determination of cobalt content
GB/T 223.23 Iron,,steel and alloy.Determination of nickel content.The dimethylglyoxime spectrophotometric method
GB/T 223.24 Methods for chemical analysis of iron, steel and alloy.The extraction seperation--The dimethylglyoxime spectrophotometric method for the determination of nickel content
GB/T 223.25 Methods for chemical analysis of iron, steel and alloy.The dimethylglyoxime gravimetric method for the determination of nickel content
GB/T 223.26 Iron,steel and alloy.Determination of molybdenum content.The thiocyanate spectrophotometric method
GB/T 223.27 Methods for chemical analysis of iron, steel and alloy.The thiocyanate-butyl acetate extraction spectrophotometric method for the determination of molybdenum content
GB/T 223.28 Methods for chemical analysis of iron,steel and alloy--The α-benzoinoxime gravimetric method for the determination of molybdenum content
GB/T 223.29 Iron,steel and alloy.Determination of lead content.Carrier precipitation-xylenol orange spectrophotometric method
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy--The diantipyrylmethane phosphomolybdate gravimetric method for the determination of phosphorus content
GB/T 223.30 Methods for chemical analysis of iron,steel and alloy. The arsenazo Ⅲ spectrophotometric method for the determination of zirconium content after separation by p-bromomandelic acid
GB/T 223.31 Iron,steel and alloy.Determination of arsenic content.Distillation-molybdenum blue spectrophotometric method
GB/T 223.32 Methods for chemical analysis of iron,steel and alloy. The hypophosphite reduction-iodimetric method for the determination of arsenic content
GB/T 223.33 Methods for chemical analysis of iron,steel and alloy. The chlorophosphonazo mA photometric method for the determination of cerium content after extraction separation
GB/T 223.34 Methods for chemical analysis of iron,steel and alloy-The determination of hydrochloric acid-insoluble content of iron powders
GB/T 223.35 Methods for chemical analysis of iron,steel and alloy--The pulse heating inert gas fusion-coulometric titration method for the determination of oxygen content
GB/T 223.36 Methods for chemical analysis of iron, steel and alloy. The neutral titration method for the determinaion of nitrogen content after distillation separation
GB/T 223.37 Iron, steel and alloy—Determination of nitrogen content—Indophenol blue spectrophotometric method after distillation separation*， 2020-06-02 Update
GB/T 223.38 Methods for chemical analysis of iron,steel and alloy--The anion-exchange separation-gravimetric method for the determination of niobium content
GB/T 223.39 Methods for chemical analysis iron,steel and alloy. The sulphochlorophenol S photometric method for the determination of niobium content
GB/T 223.4 Alloyed steel.Determination of manganese content.Potentiometric or visual titration method
GB/T 223.40 Iron, steel and alloy Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.41 Methods for chemical analysis of iron,steel and alloy--The anion-exchange separation-pyrogallol photometric method for the determination of tantalum content
GB/T 223.42 Methods for chemical analysis of iron,steel and alloy--The anion-exchange separation-bromopyrogallol red photometric method for the determination of tantalum content
GB/T 223.43 Iron,steel and alloy.Determination of tungsten content.Gravimetric method and spectrophotometric method
GB/T 223.45 Methods for chemical analysis of iron,steel and alloy. The cupral Separation-xylidyl blue Ⅱphotometric method for the determination of magnesium content
GB/T 223.46 Methods for chemical analysis of iron,steel and alloy--The flame atomic absorption spectrometric method for the determination of magnesium content
GB/T 223.47 Methods for chemical analysis of iron,steel and alloy. The carrier precipitation-molybdenum blue potometric method for the determination of antimony content
GB/T 223.48 Methods for chemical analysis of iron,steel and alloy--The semixylenol orange photometric method for the determination of bismuth content
GB/T 223.49 Methods for chemical analysis of iron,steel and alloy. Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare tarth content
GB/T 223.5 Steel and iron.Determination of acid-soluble silicon and total silicon content.Reduced molybdosilicate spectrophotometric method
GB/T 223.50 Methods for chemical analysis of iron, steel and alloy. The phenylfluorone-CTMAB direct photometric method for the determination of tin content
GB/T 223.51 Methods for chemical analysis of iron,steel and alloy--The 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol photometric method for the determination of zinc content
GB/T 223.52 Methods for chemical analysis of iron,steel and alloy--The hydroxylamine hydrochloride-iodometric method for the determination of selenium content
GB/T 223.53 Methods for chemical analysis of iron,steel and alloy--The flame atomic absorption spectrophotometric method for the determination of copper content
GB/T 223.54 Iron, steel and alloy—Determination of nickel content—Flame atomic absorption spectrometric method*， 2022-07-11 Update
GB/T 223.55 Iron, steel and alloy. Determination of tellurium content. Oscillo-polarographic method
GB/T 223.56 Methods for chemical analysis of iron,steel and alloy--The sulfhydryl cotton fiber separation-oscillopolarographic method for the determination of tellurium content
GB/T 223.57 Methods for chemical analysis of iron,steel and alloy--The extraction-absorption catalytic polarographic method for the determination of cadmium content
GB/T 223.58 Methods for chemical analysis of iron,steel and alloy--The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
GB/T 223.59 Iron,steel and alloy.Determination of phosphorus content.Bismuth phosphomolybdate blue spectrophotometic method and antimony phosphomolybdate blue spectruophotometric method
GB/T 223.6 Methods for chemical analysis of iron,steel and alloy. The neutralization titrimetric method for the determination of boron content
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy--The perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.61 Methods for chemical analysis of iron, steel and alloy--The ammonium phosphomolybdate volumetric method for the determination of phosphorus content
GB/T 223.62 Methods for chemical analysis of iron, steel and alloy--The butyl acetate extraction photometric method for the determination of phosphorus content
GB/T 223.63 Iron, steel and alloy—Determination of manganese content—Sodium (potassium) periodate spectrophotometric method*， 2022-07-11 Update
GB/T 223.64 Iron,steel and alloy.Determination of manganese content.Flame atomic absorption spectrometric method
GB/T 223.65 Steel, iron and alloy.Determination of cobalt content.Flame atomic absorption spectrometric method
GB/T 223.66 Methods for chemical analysis of iron,steel and alloy--The thiocyanate-chlorpromazine hydrochloride-chloroform extraction photometric method for the determination of tungsten content
GB/T 223.67 Iron,steel and alloy.Determination of sulfur content.Methylene blue spectrophotometric method
GB/T 223.68 Methods for chemical analysis of iron, steel and alloy. The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content
GB/T 223.69 Iron,steel and alloy.Determination of carbon contents.Gas-volumetric method after combustion in the pipe furnace
GB/T 223.7 Iron powder--Determination of iron content--Potassium dichromate titration method
GB/T 223.70 Iron,steel and alloy.Determination of iron contents. o-Phenanthroline spectrophotometric method
GB/T 223.71 Methods for chemical analysis of iron, steel and alloy. The gravimetric method after combustion in the pipe furnace for the determination of carbon content
GB/T 223.72 Iron,steel and alloy.Determination of sulfur content.Gravimetric method
GB/T 223.73 Iron,steel and alloy.Determination of iron contents. Titanium trichloride-potassium dichromate titration method
GB/T 223.74 Methods for chemical analysis of iron, steel and alloy. The combustion gravimetric/gas-volumetric method for the determination of combined carbon content
GB/T 223.75 Iron,steel and alloy.Determination of boron content. Methanol distillation-curcumin photometric method
GB/T 223.76 Methods for chemical analysis iron,steel and alloy.The flame atomic absorption spertrometric method for the determination of vanadium content
GB/T 223.77 Methods for chemical analysis iron,steel and alloy.The flame atomic absorption spertrometric method for the determination of calcium content
GB/T 223.78 Methods for chemical analysis of iron,steel and alloy-Curcumin spectrophotometric method for the determination of boron content
GB/T 223.79 Iron and steel-Determination of multi-element contents-X-ray fluorescence spectrometry (Routine method)
GB/T 223.8 Methods for chemical analysis of iron,steel and alloy The sodium fluoride separation-EDTA titration method for the determination of aluminium content
GB/T 223.80 Iron,steel and alloy-Determination of trace bismuth and arsenic contents- Hydride generation-atomic fluorescence spectrometric method
GB/T 223.81 Iron,steel and alloy-Determination of total aluminum and total aluminum and total boron contents-Microwave digestion-inductively coupled plasma mass spectrometric method
GB/T 223.82 Steel and iron.Determination of hydrogen content.Thermal conductivity/infrared method after fusion under inert gas*， 2018-05-14 Update
GB/T 223.83 Steel and iron.Determination of high sulfur content.Infrared absorption method after combustion in an induction furnace
GB/T 223.84 Steel and iron.Determination of titanium content.Diantipyrylmethane spectrophotometric method
GB/T 223.85 Steel and iron.Determination of sulfur content.Infrared absorption method after combustion in an induction furnace
GB/T 223.86 Steel and iron.Determination of total carbon content.Infrared absorption method after combustion in an induction furnace
GB/T 223.87 Iron, steel and alloy.Determination of calcium and magnesium.Inductively coupled plasma mass spectrometric method*， 2018-05-14 Update
GB/T 223.88 Iron, steel and alloy—Determination of calcium and magnesium contents—Inductively coupled plasma atomic emission spectrometric method*， 2019-06-04 Update
GB/T 223.89 Iron, steel and alloy—Determination of tellurium content—Hydride generation-atomic fluorescence spectrometric method*， 2019-08-30 Update
GB/T 223.9 Iron,steel and alloy.Determination of aluminium content.Chrome azurol S photometric method
GB/T 223.90 Iron, steel and alloy—Determination of silicon content—Inductively coupled plasma atomic emission spectrometric method*， 2021-08-20 Update
GB/T 223.91 Iron, steel and alloy—Determination of copper—2,2’-Biquinoline spectrophotometric method*， 2021-08-20 Update
GB/T 228.1 Metallic materials—Tensile testing—Part 1: Method of test at room temperature*， 2021-12-31 Update
GB/T 229 Metallic materials—Charpy pendulum impact test method*， 2020-09-29 Update
GB/T 4336 Determination of multi-element content in carbon steel and medium and low alloy steel Spark discharge atomic emission spectrometry (conventional method) Amendment No. 1
GB/T 5117 Covered electrodes for manual metal arc welding of non-alloy and fine grain steels
GB/T 5293 Solid wire electrodes, tubular cored electrodes and electrode/flux combinations for submerged arc welding of non alloy and fine grain steels*， 2018-03-15 Update