This standard specifies the classification, code number, size, appearance, weight, technical requirements, test methods, inspection rules, package, marks and quality certificate of seamless stainless steel tubes for boiler and heat exchanger.
This standard is applicable to seamless austenite and ferritic stainless steel tube for boiler and heat exchanger.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, all subsequent modifications (excluding correction contents) or revisions are not applicable to this standard. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative document is applicable to these specifications.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
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 223.15 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 223.18 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 223.25 Methods for Chemical Analysis of Iron, Steel and Alloy; the Dimethylglyoxime Gravimetric 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 223.28 Methods for Chemical Analysis of Iron Steel and Alloy; the D-Denzoinoxime Gravimetric 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 Determination 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 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 223.41 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 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy; the Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content
GB/T 223.62 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 223.68 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 Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content
GB/T 228 Metallic Materials-Tensile Testing at Ambient Temperature (GB/T 228-2002, eqv ISO 6892:1998)
GB/T 230.1 Metallic Rockwell Hardness Test-Part 1: Test Method (Scales A, B, C, D, E, F, G, H, K, N, T) (GB/T 230.1-2004, ISO 6508-1: 1999, MOD)
GB/T 231.1 Metallic Materials--Brinell Hardness Test--Part 1: Test Method (GB/T 231.1-2002, eqv ISO 6506-1: 1999)
GB/T 241 Method Tubes-Hydrostatic Pressure Testing
GB/T 242 Metallic Materials-Tube-Drift Expanding Test (GB/T 242-1997, eqv ISO 8493:1986)
GB/T 246 Metallic Materials--Tube--Flattening Test (GB/T 246-1997, eqv ISO 8492:1986)
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 4334.5 Stainless Steels-Method of Copper Sulphate-Sulphuric Acid Corrosion Test
GB/T 4338 Metallic MaterialsD Tensile Testing at Elevated Temperature (GB/T 4338-2006, ISO 738:1989, MOD)
GB/T 4340.1 Metallic Materials--Vickers Hardness Test --Part 1: Test Method (GB/T 4340.1-1999, eqv ISO 6507-1:1997)
B/T 5777 Seamless Steel Pipe and Tubing-Methods for Ultrsonic Testing (GB/T 5777-1996, eqv ISO 9303:1989) GB/T 6394 Metal-Methods for Estimating the Average Grain Size
GB/T 7735 Steel Tubes--The Inspection Method on Eddy Current Test (GB/T 7735-2004, ISO 9304:1989, MOD)
GB/T 11170 Method for Photoelectric Emission Spectroscopic Analysis of Stainless Steel
GB/T 17395-1998 Dimensions, Shapes, Masses and Tolerances of Seamless Steel Tubes (neq ISO 1127:1992, ISO 4200:1991, ISO 5252:1991)
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
The seamless steel tubes in this standard are divided into two types according to manufacturing methods; the type and code number are:
a) Hot-rolled (squeezed, extended) steel tube--WH
b) Cold drawn (rolled) steel tube--WC
