Seamless Stainless Steel Tubes for Boiler and Heat Exchanger
锅炉、热交换器用不锈钢无缝钢管
1 Scope
This standard specifies the classification, code, dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of seamless stainless steel tubes for boiler and heat exchanger.
This standard is applicable to seamless stainless steel tubes for boiler and heat exchanger (hereinafter referred to as "steel tube").
2 Normative References
The following referenced documents are indispensable for application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration 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 223.25 Methods for Chemical Analysis of Iron, Steel and Alloy - The Dimethylglyoxime Gravimetric Method for the Determination of Nickel Content
GB/T 223.26 Iron, Steel and Alloy - Determination of Molybdenum Content - The Thiocyanate Spectrophotometric Method
GB/T 223.28 Methods for Chemical Analysis of Iron, Steel and Alloy - The α-benzoinoxime 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 Indophenol Blue Photometric Method for the Determination of Nitrogen Content after Distillation Separation
GB/T 223.40 Iron, Steel and Alloy - Determination of Niobium Content - The Sulfochlorophenol S Spectrophotometric Method
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 223.62 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 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 223.72 Iron, Steel and Alloy - Determination of Sulfur Content - Gravimetric Method
GB/T 223.84 Steel and Alloy - Determination of Titanium Content - Diantipyrylmethane Spectrophotometric Method
GB/T 223.85 Steel and Alloy - Determination of Sulfur Content - Infrared Absorption Method after Combustion in an Induction Furnace
GB/T 223.86 Steel and Iron - Determination of Total Carbon Content - Infrared Absorption Method after Combustion in an Induction Furnace
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1: Method of Test at Room Temperature
GB/T 230.1 Metallic Materials - Rockwell Hardness Test - Part 1: Test method (Scales A, B, C, D, E, F, G, H, K, N, T)
GB/T 231.1 Metallic Materials - Brinell Hardness Test - Part 1: Test Method
GB/T 241 Metal Materials - Tube - Hydrostatic Pressure Test
GB/T 242 Metallic Materials - Tube - Drift Expanding Test
GB/T 246 Metal Materials - Tube - Flattening Test
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 4334-2008 Corrosion of Metals and Alloys - Test Methods for Intergranular Corrosion of Stainless Steels
GB/T 4340.1 Metallic Materials - Vickers Hardness Test - Part 1: Test Method
GB/T 4338 Metallic Materials - Tensile Testing at Elevated Temperature
GB/T 5777-2008 Seamless Steel Pipe and Tubing Methods for Ultrasonic Testing
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 17395-2008 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 20878-2007 Stainless and Heat-resisting Steels - Designation and Chemical Composition
3 Classification and Code
3.1 Steel tubes are classified into two categories according to the manufacturing methods, and the categories and designations are:
a) Hot-rolled (extruded) steel tube W-H;
b) Cold-drawn (rolled) steel tube W-C.
3.2 The following codes are applicable to this standard:
D - nominal outside diameter;
S - nominal wall thickness;
Smin - minimum wall thickness.
4 Order Contents
The contract or order for ordering steel tubes according to this standard shall include the following contents:
a) Standard number;
b) Product name;
c) Designation of steel;
d) Dimensions (outside diameter × wall thickness, in mm);
e) Ordered quantity (total weight, total length or number);
f) Manufacturing method;
Foreword I 1 Scope 2 Normative References 3 Classification and Code 4 Order Contents 5 Dimension, Shape, Weight and Permissible Deviation 6 Technical Requirements 7 Test Methods 8 Inspection Rules 9 Packaging, Marking and Quality Certificate Appendix A (Informative) Specified Plastic Elongation Strength at High Temperature Appendix B (Informative) Recommended Data of 100000h Endurance Strength
