This standard specifies classification, code name, dimension, shape, weight, technical requirements, specimen, test methods, inspection rules as well as packaging, marking and quality certificate.
This standard is applicable to seamless tubes for manufacturing high-pressure steam boiler or above and seamless tubes used as pipelines.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 222 Allowable Deviation of Chemical Composition of Finished Products
GB/T 223.5 Steel and Iron - Determination of Acid-Soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.9 Iron Steel And Alloy - Determination of Aluminium Content - Chrom Azurol Sphotometric Method
GH/T 223.11 Determination of Chromium Content in Steel and Alloys - Visual Titration or Potentiometric Titration
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 Iron Steel and Alloy - Determination of Nickel Content - The Dimethylglyoxime Spectrophotometric Method
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 223.29 Iron Steel And Alloy - Determination of Lead Content - Carrier Precipitation-Xylenol Orange Spectrophotometric Method
GB/T 223.30 Methods for Chemical Analysis of Iron, Steel and Alloy - The Arsenazo III Spectrophotometric Method for the Determination of Zirconium Content after Separation by P-Bromomandelic Acid
GB/T 223.31 Iron Steel and Alloy - Determination of Arsenic Content - Distillation-molybdenum Blue Spectrophotometric Method
