1. Scope
This national standard specifies dimension, shape, technical requirements, test methods, test rules, packaging, mark and quality certificate of stainless steel seamless tubes for fluid transport.
This national standard is applicable to the stainless steel seamless tubes for fluid transport (hereinafter referred to as "steel tube").
2. Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments (excluding amending error in the text) to, or revisions of, any of these publications do not apply commission. However, the parties whose enter into agreement according to these specifications are encouraged to research whether the latest editions of these references are applied or not. For undated references, the latest edition of the normative document is applicable to these specifications.
GB/T 222 Sampling methods for steel chemical analysis and allowable deviation of finished product chemical composition
GB/T223.11 Chemical analysis method for steel and alloy - use ammonium persulfate oxygenation volumetric method to measure chromium quantity
GB/T 223.16 Chemical analysis method for steel and alloy - use chromotropic acid photometry to measure titanium quantity
GB/T 223.18 Chemical analysis method for steel and alloy - sodium thiosulfate separation - use iodimetry to measure copper quantity
GB/T 223.23 Chemical analysis method for steel and alloy - use dimethylglyoxime spectrophotometry to measure nickel quantity
GB/T 223.25 Chemical analysis method for steel and alloy - use dimethylglyoxime gravimetry to measure nickel quantity
GB/T 223.28 Chemical analysis method for steel and alloy - use α benzoin oxime gravimetry to measure molybdenum quantity
GB/T 223.36 Chemical analysis method for steel and alloy - fractionation by distillation - use neutralization titrimetric method to measure nitrogen quantity
GB/T 223.40 Chemical analysis method for steel and alloy - ion-exchange separation - use Chlorsulphophenol S photometry to measure niobium quantity
GB/T 223.60 Chemical analysis method for steel and alloy - use perchloric acid dehydration gravimetry to measure silicon content
GB/T 223.62 Chemical analysis method for steel and alloy - use butyl acetate extraction-photometric method to measure phosphonium quantity
GB/T 223.63 Chemical analysis method for steel and alloy - use heavy sodium iodate (kalium iodate) photometry to measure manganese quantity
GB/T 223.68 Chemical analysis method for steel and alloy - use kalium iodate titrimetric method to measure sulfur content after combustion in the tubular furnace
GB/T 223.69 Chemical analysis method for steel and alloy - use gas capacity method to measure carbon content after combustion in the tubular furnace
GB/T 228-1987 Metal tension test methods
GB/T 241 Metal tube - hydraulic test method
GB/T 242 Metal tube - expanding test method
GB/T 246 Metal tube - flattening test method
GB/T 2102 Acceptance inspection, packaging, mark and quality certificate of steel tube
GB/T 2975 Mechanical test sampling location and sample preparation for steel and steel products
GB/T 4334.1 Stainless steel - 10% oxalic acid etching test method
GB/T 4334.2 Stainless steel - sulfuric acid-ferric sulfate corrosion test method
GB/T 4334.3 Stainless steel - 65% nitric acid corrosion test method
GB/T 4334.4 Stainless steel - nitric acid- hydrofluoric acid corrosion test method
GB/T 4334.5 Stainless steel - sulfuric acid-copper sulfate corrosion test method
GB/T 4334.6 Stainless steel - 5% sulfuric acid corrosion test method
GB /T 5777 Seamless tube ultrasonic inspection method
GB/T 6397-1996 Metal tension test sample
GB/T 7735-1995 Steel tube eddy current inspection method
GB/T 11170 Stainless steel photoemission spectral analysis method
GB/T 17395-1998 Dimension, shape, weight and allowable deviation of seamless tube
3. Classification, Code Name
According to the product processing mode, steel tubes can be divided into two types, and the classification and code name is:
Hot rolling (squeezing, expanding) WH
Cold drawing (rolling) WC
According to the size precision, steel tubes can be divided into two types:
Ordinary grade PA
Advanced grade PC
4. Order Content
For the purpose of this national standard, the contract or order of the ordered steel tubes shall contain the following content so as to make proper explanations to the steel tube:
a) Standard serial number;
b) Product name;
c) Steel grade;
d) Dimension;
e) Weight or quantity;
f) Condition of delivery;
g) Optional requirements;
h) Other special requirements.
