1 Scope
This standard specifies classification, code name, dimension, shape, weight, technical requirement, test method, test rules, packaging, marking and quality certificate of steel pipe with a longitudinal electric (resistance) weld.
This standard is applicable to steel pipe with a longitudinal electric (high frequency resistance) weld for common purpose which he outside diameter is not larger than 630mm.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties having reached an agreement based on cited standards with a date are encouraged to study whether the latest versions of the cited documents with a date are applicable. For undated references, the latest edition of the normative document referred to applies.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
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/T223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method
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 Methods for chemical analysis of iron, steel and alloy -The ammonium persulfate oxidation volumetric method for the determination of chromium content
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 223.14 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 223.16 Methods for chemical analysis of iron, steel and alloy - the chromotropic acid 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 copper 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 223.23 Methods for chemical analysis of iron, steel and alloy - the dimethylglyoxime spectrophotometric method for the determination of nickel content
GB/T 223.24 Methods for chemical analysis of iron, steel and alloy - the extraction separation - The dimethylglyoxime spectrophotometric method for the determination of nickel content
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 223.37 Methods for chemical analysis of iron steel and alloy - the indophenal blue photometric methods for the determination of nitrogen content after distillation separation
GB/T 223.40 Methods for chemical analysis of iron, steel and alloy - the anion-exchange separation-sulphochlorophenol S photometric method for the determination of niobium 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 Methods for chemical analysis of iron, steel and alloy - the flame atomic absorption spectrophotometric method for the determination of nickel 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 Methods for chemical analysis of iron, steel and alloy - the reduced molybdoantimonyl phosphoric acid photometric method for the determination of phosphorus 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 Methods for chemical analysis of iron, steel and alloy - The sodium (potassium)periodate photometric method for the determination of manganese content
GB/T 223.64 Methods for chemical analysis of iron, steel and alloy - the flame atomic absorption spectrometric method for the determination of manganese content
GB/T 223.67 Methods for chemical analysis of iron, steel and alloy - The reducing distillation-methylene blue photometric method for the determination of sulfur content
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 Methods for chemical analysis of iron, steel and alloy - The gas- volumetric method after combustion in the pipe furnace for the determination of carbon content
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 Methods for chemical analysis of iron, steel and alloy - The alumina chromatographic separation-barium sulfate gravimetric method for the determination of sulphur content
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 228 Metallic materials - Tensile testing at ambient temperature (GB/T 228-2002, ISO 6892: 1998, EQV)
GB/T 241 Metal tubes - Hydrostatic pressure testing
GB/T 242 Metallic materials--Tube--Drift expanding test (GB/T 242-2007, ISO 8493: 1998, IDT)
GB/T 244 Metallic materials-Tube - Bend test (GB/T 244-2008, ISO 8491: 1998, IDT)
GB/T 246 Metal materials - Tube - Flattening test (GB/T 246-2007, ISO 8492: 1998, IDT)
GB/T 699 Carbon constructional quality steel
GB/T 700 Carbon structural steels (GB/T 700-2006, ISO 630: 1995, NEQ)
GB/T 1591 High strength low alloy structural steels
GB/T 2102 Acceptance packing marking and quality certification of steel pipe
GB/T 2975 Steel and steel products--Location and preparation of test pieces for mechanical testing
GB/T 4336 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-Alloy steel (routine method)
GB/T 7735 Steel tubes - The inspection method on eddy current test (GB/T 7735-2004, ISO 9304: 1989, MOD)
GB/T 12606 Steel tubes--The testing method of magnetic flux leakage (GB/T 12606-1999, eqv ISO 9402: 1989, ISO 9598: 1989)
GB/T 18256 Welded steel tubes (except submerged arc-welded-Ultrasonic testing for verification of hydraulic leak-tightness
GB/T 20066 Steel and Iron Sampling and preparation of samples for the determination of chemical composition (GB/T 20066-2006, ISO 14284: 1996, IDT)
GB/T 20123 Steel and iron—Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method) (GB/T20123-2006, ISO 15350: 2000, IDT)
GB/T 21835 Dimensions and masses per unit length of welded steel pipes (GB/T 21835-2008, ISO 1127: 1992, ISO 4200: 1991, NEQ)
3 Classification and Code Name
Based on manufacturing precision, the classification and code name of steel pipe are as:
a) Steel pipe with general precision outside diameter, PD. A;
b) Steel pipe with higher precision outside diameter, PD. B;
c) Steel pipe with super-precision outside diameter, PD. C;
d) Steel pipe with general precision wall thickness, PT. A;
e) Steel pipe with higher precision wall thickness, PT. B;
