GB/T 3087-2022 Seamless steel tubes and pipes for low and medium pressure boiler English
1 Scope
This standard specifies the order contents, dimensions, shapes, weights and tolerance, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of seamless steel tubes and pipes for low and medium pressure boiler.
This standard applies to the manufacture of high-quality carbon structural seamless steel tubes and pipes for low and medium pressure boiler (hereinafter referred to as "steel pipes"), and to other seamless steel tubes and pipes of pipelines for reference.
2 Normative references
The following referenced documents are indispensable for the application of this standard. 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 Permissible tolerances for chemical composition of steel products
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.12 Methods for chemical analysis of iron, steel and alloy - The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium 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 Iron, steel and alloy - Determination of nickel content - The dimethylglyoxime spectrophotometric method
GB/T 223.37 Iron, steel and alloy - Determination of nitrogen content - Indophenol blue spectrophotometric method after distillation separation
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 223.63 Methods for chemical analysis of iron, steel and alloy; the sodium (potassium) periodate photometric method for the determination of manganese content
GB/T 223.85 Steel and iron - Determination of sulfur content - Infrared absorption method after combustion in an induction furnace
GB/T 223.86 Steel, iron and alloy - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace
GB/T 226 Test method for macrostructure and defect of steel by etching
GB/T 228.1 Metallic materials - Tensile testing - Part 1 : Method of test at room temperature
GB/T 228.2 Metallic materials - Tensile testing - Part 2:Method of test at elevated temperature
GB/T 241 Metal materials - Tube - Hydrostatic pressure testing
GB/T 242 Metallic materials - Tube - Drift expanding test
GB/T 244 Metallic materials - Tube - Bend test method
GB/T 246 Metallic 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 samples and test pieces for mechanical testing
GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/T 5777-2016 Automated full peripheral ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections
GB/T 17395 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 30062 Terminology of steel pipes and tubes
GB/T 40080 Nondestructive testing of steel tubes - Automated electromagnetic testing of seamless and welded (except submerged arc-welded) steel tubes for the verification of hydraulic leaktightness
YB/ T 4149 Continuously cast round billet for seamless steel tube rolling
YB/T 5222 Quality hot rolled and forged carbon structural steel round tube blank
3 Terms and definitions
For the purpose of this standard, the terms and definitions specified in GB/T 30062 apply.
4 Order content
The contract or order for ordering steel pipes according to this standard shall cover the followings:
a) document No.;
b) product name;
c) steel grade;
d) dimensions;
e) order quantity (total weight or length);
f) delivery state;
g) special requirements.
5 Dimension, shape, weight and tolerance
5.1 Outside diameter and wall thickness
The nominal outside diameter (D) and nominal wall thickness (S) of steel pipe shall comply with GB/T 17395. As required by the purchaser, steel pipes beyond the dimension specified in GB/T 17395 may be supplied upon negotiation between the supplier and the purchaser.
5.2 Tolerances for outside diameter and wall thickness
5.2.1 The tolerances for outside diameter of steel pipes shall meet those specified in Table 1.
Table 1 Tolerances for outside diameter of steel pipes
Dimensions in millimetres
Manufacturing method Tolerance
Hot rolled (expanded) steel pipe ±1%D or ±0.50, whichever is greater
Cold drawn (rolled) steel pipe ±0.75D% or ±0.30, whichever is greater
5.2.2 The tolerances for wall thickness of hot rolled (expanded) steel pipes shall meet those specified in Table 2.
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Order content
5 Dimensions, shapes, weights and permissible deviations
6 Technical requirements
7 Test methods
8 Inspection rules
9 Packaging, marking and quality certificate
