This standard specifies the classification, code number, dimension, shape, weight, technical requirements, testing method, inspection rules, packing, marking and quality certificate of carbon and carbon-manganese steel seamless steel tubes and pipes for ship (hereinafter referred to as steel tubes and pipes).
This standard is applicable to the carbon and carbon-manganese steel seamless steel tubes and pipes used for Grade I and I pressure piping system, boilers and superheaters for manufacturing ships.
2 Normative References
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments (excluding corrigendum content) to, or revisions of, any of these publications do not apply. However, parties that enter into an agreement according to this standard are encouraged to study whether the latest edition of these documents can be used. For any 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 223.5 Steel and Iron - Determination of Acid-soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method (GB/T 223.5-2008, ISO 4829-1: 1986, ISO 4829-2: 1988, MOD)
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 223.26 Iron Steel and Alloy-Determination of Molybdenum Content-The Thiocyanate Spectrophotometric Method
GB/T 223.53 Methods for Chemical Analysis of Iron, Steel and Alloy -The Flame Atomic Absorption Spectrophotometric Method for the Determination of Nickel 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 223.54-1987, eqv ISO/DIS 4940: 1986)
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 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy; The Sodium (Potassium) Periodate Photometric Method for the Determination of Manganese Content
GB/T 223.68 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 228 Metallic Materials--Tensile Testing at Ambient Temperature (GB/T 228-2002, eqv ISO 6892: 1998)
GB/T 229 Metallic Materials-Charpy Pendulum Impact Test Method (GB/T 229-2007, ISO 148-1: 2006, MOD)
GB/T 232 Metallic Materials - Bend Test (GB/T 232-1999, eqv ISO 7438: 1985)
GB/T 241 Metal Materials-Tube-Hydrostatic Pressure Test
GB/T 242 Metallic Materials-Tube-Drift Expanding Test (GB/T 242-2007, ISO 8493: 1998, IDT)
GB/T 245 Metallic Materials-Tube-Flanging Test (GB/T 245-2008, ISO 8494: 1998, IDT)
GB/T 246 Metallic Materials-Tube-Flattening Test (GB/T 246-2007, ISO 8492: 1998, IDT)
GB/T 2102 Acceptance, Packing, Marking and Certification of Pipe
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 Method for Photoelectric Emission Spectroscopic Analysis of Carbon Steel and Medium and Low Alloy Steel
GB/T 4338 Metallic materials--Tensile Testing at Elevated Temperature (GB/T 4338-2006, ISO 783: 1989, MOD)
GB/T 5777 Seamless Steel Pipe and Tubing Methods for Ultrasonic Testing (GB/T 5777-2008, ISO 9303: 1989, MOD)
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 17395 Dimensions, Shapes, Masses and Tolerances of Seamless Steel Tubes (GB/T 17395-2008, ISO 1127: 1992, ISO 4200: 1991, ISO 5252: 1991, NEQ)
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 Classification and Code Number
3.1 Steel tubes and pipes are classified into two categories according to the manufacturing methods. The categories and code numbers are as follows:
a) Hot rolled WHR (extruded WHEX, hot expanded WHE) steel tubes and pipes;
b) Cold drawn WCD (cold rolled WCR) steel tubes and pipes.
