This Standard specifies dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of wide and heavy plates for line pipe of petroleum and natural gas.
This Standard is applicable to longitudinal welded pipe of petroleum and natural gas produced according to Standards of API SPEC 5L, ISO 3183 and GB/T 9711, and other wide and heavy plates with thickness of 6~40 mm for longitudinal welded pipe of other fluid with the similar requirements.
2 Normative References
The following standard contains provisions which, by reference into this document, constitute the provisions of this document. For dated reference, subsequent amendments (excluding corrigendum) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this Standard are encouraged to study whether the latest edition of these documents applies. For undated references, the latest edition 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/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 223.14 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 223.23 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 Seperation - The Dimethylglyoxime Spectrophotometric Method for the Determination of Nickel Content
GB/T 223.26 Methods for Chemical Analysis of Iron, Steel and Alloy - The Thiocyanate Direct Photometric Method for the Determination of Molybdenum Content
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 223.36 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 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 - Detetmination of Niobium Content by the Sulphochlorophenol S 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 Methods for Chemical Analysis of Iron, Steel and Alloy - The Reduced Molybdoantimonyl Phosphoric Acid Photometric Method for the Determination of Phosphorus Content
GB/T223.60 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 Nethod 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 Surfur Content
GB/T 223.69 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 223.71 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 223.75 Methods for Chemical Analysis of Iron, Steel and Alloy -The Methanol Distillation-Curcumin Photometric Method for the Determination of Boron Content
GB/T 223.76 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame Atomic Absorption Spectrometric Method for the Determination of Vanadium Content
GB/T 228 Metallic Materials-Tensile Testing at Ambient Temperature (GB/T 228-2002, eqv ISO 6892: 1998)
GB/T 229 Metallic Materials - Charpy Notch Impact Test (GB/T 229 - 1994, eqv ISO 83:1976, eqv ISO 148:1983)
GB/T 232 Metallic Materials - Bend Test (GB/T 232-1999, eqv ISO 7438: 1985)
GB/T 247 General Rule of Acceptance, Package, Mark and Certification for Steel Plates (Sheets) and Strips
GB/T 709 Dimension, Shape, Weight and Tolerances for Hot-Rolled Steel Plates and Sheets
GB/T 2970 Thicker Steel Plates - Method for Ultrasonic Inspection
GB/T 2975 Steel and Steel Products - Location and Preparation of Test Pieces for Mechanical Testing (GB/T 2975-1998, eqv ISO 377: 1997)
GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-Alloy Steel (Routine Method)
GB/T 8363 Test Method for Drop-Weight Tear Tests of Steel Products
GB/T 17505 Steel and Steel Products - General Technical Delivery Requirements (GB/T 17505-1998, eqv ISO 404: 1992)
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)
3 Expression Method of Designation
Expression method of steel designation is consistent with those specified in GB/T 9711.1, which is composed by the first English letter of Line in "line pipe" and the value of the minimum specified yield strength.
E.g. L415
L - represents the first letter of "Line" in line pipe;
415 - the value of the minimum specified yield strength, in MPa.
