This standard specifies seamless steel tubes for high-pressure for chemical fertilizer equipments in terms of dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and certification, etc.
This standard is applicable to seamless steel tube for high-pressure chemical fertilizers equipments and pipeline or the ones for other chemical equipment.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated reference, the latest edition of the normative document (including any amendments) 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/T 223. 5 Steel and Iron - Determination of Acid-soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.11 Iron Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration Method
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 223.18 "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 Iron, Steel and Alloy - Determination of Nickel Content - The Dimethylglyoxime Spectrophotometric Method
GB/T 223. 26 Iron Steel and Alloy-Determination of Molybdenum Content-The Thiocyanate Spectrophotometric Method
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 Iron, Steel and Alloy-Determination of Niobium Content by the Sulphochlorophenol S Spectrophotometric Method
GB/T 223. 43 Iron, Steel and Alloy - Determination of Tungsten Content - Gravimetric Method and Spectrophotometric Method
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 Iron Steel and Alloy - Determination of Phosphorus Content - Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony Phosphomolybdate Blue Spectrophotometric Method
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 Iron Steel and Alloy- Determination of Manganese Content - Flame Atomic Absorption Spectrometric Method
GB/T 223.68 GB/T 223.72 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. 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. 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 226 Etch Test for Macrostructure and Defect of Steels
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1 : Method of Test at Room Temperature
GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method
GB/T 241 Metallic Pipe - Hydraulic Pressure Test Method
GB/T 242 Metal Materials—Tube—Drift-expending Test
GB/T 246 Metallic materials--Tube--Flattening test
GB/T 1979 Standard Diagrams for Macrostructure and Defect of 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 5777-2880 Seamless Steel Pipe and Tubing Methods for Ultrasonic Testing
GB/T 7735-2004 Steel Tubes - The Inspection Method on Eddy Current Test
GB/T 10561-2005 Steel Determination of Content of Nonmetallic Inclusions Micrographic Method using Standards Diagrams
GB/T 12606-1999 Steel Tubes--The Testing Method of Magnetic Flux Leakage
GB/T 17395 Dimensions, Shapes, Masses and Tolerances of Seamless Steel Tubes
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition
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/T 20124 Steel and Iron - Determination of Nitrogen Content - Thermal Conductimetric Method after Fusion in a Current of Inert Gas (Routine Method)
GB/T 20125 Low-alloy Steel - Determination of Multi-element Contents - Inductively Coupled Plasma Atomic Emission Spectrometric Method
GB/T 4149 Continuously Cast Round Billet for Seamless Steel Tube Rolling
GB/T 5137 Round Blank of Hot-rolled and Forged Seamless Steel Tube for High Pressure
3 Order
For the purpose of this standard, the order contract or order form shall include the following information:
a) Standard No. ;
b) Product name;
