Standard No.:	GB/T 12770-2002
English Name:	Welded Stainless Steel Tubes for Machine Structures
Chinese Name:	机械结构用不锈钢焊接钢管
Professional Classification:	GB    National Standard
Issued by:	General Administration of Quality Supervision, Inspection and Quarantine
Issued on:	2002-09-11
Implemented on:	2003-2-1
Status:	superseded
Superseded by:	GB/T 12770-2012 Welded stainless steel tubes for mechanical structures
Superseded on:	2013-5-1
Superseding:	GB/T 12770-1991 Welded stainless steel tubes for machine structure
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	100.0
Delivery:	via email in 1 business day

for Chemical Analysis of Iron, Steel and Alloy; The anion-exchange Separation-sulphochlorophenol S Photometric Method for the Determination of Niobium Content GB/T 223.60 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 228 Metallic Materials--Tensile Testing at Ambient Temperature (neq ISO 1143, ISO 6892) GB/T 242 Metal Materials—Tube—Drift-Expending Test (eqv ISO 8493) GB/T 244 Metallic Materials-Tube - Bend Test (eqv ISO 8491) GB/T 245 Metallic Materials-Tube - Flanging Test (eqv ISO 8494) GB/T 246 Metal Materials—Tube—Flattening Test (eqv ISO 8492) 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 (eqv ISO 377) GB/T 3323 Methods for Radiographic Inspection and Classification of Radiographs for Fusion Welded Butt Joints in Steel GB/T 4334.1 Method of 10 Percent Oxalic Acid Etch Test for Stainless Steels GB/T 4334.2 Method of Ferric Sulfate-Sulfuric Acid Test for Stainless Steels GB/T 4334.3 Method of 65 Percent Nitric Acid Test for Stainless Steels GB/T 4334.4 Method of Nitric-Hydrofluoric Acid Test for Stainless Steels GB/T 4334.5 Method of Copper Sulfate-Sulfuric Acid Test for Stainless Steels GB/T 4334.6 Method of 5 Percent Sulfuric Acid Test for Stainless Steels GB/T 6397-1980 Metallic Materials--Test Pieces for Tensile Testing (neq ISO 6892) GB/T 7735 Steel Tubes—The Inspection Method on Eddy Current Test (eqv ISO 9304) GB/T 11170 Method for Photoelectric Emission Spectroscopic Analysis of Stainless Steel 3 Classification and designation It is classified into four types according to supply state: Welded condition W Heat treated state T Cold drawn (roll) state WC Burnishing (polishing) state SP Steel tube is divided into three grades according to dimensional precision: Ordinary grade PA Higher grade FB Top grade PC