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GB/T 17396-2022 English PDF (GBT17396-2022)

GB/T 17396-2022 English PDF (GBT17396-2022)

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GB/T 17396-2022: Seamless hot-rolled steel tubes for hydraulic pillar service

This document specifies the order content, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of seamless hot-rolled steel tubes for hydraulic pillar service. This document applies to the seamless hot-rolled steel tubes for cylinders and pillars used in the manufacture of coal mine hydraulic support cylinders and pillars. It also applies, as a reference, to seamless hot-rolled steel tubes for other hydraulic cylinders and pillars.
GB/T 17396-2022
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.75
CCS H 48
Replacing GB/T 17396-2009
Seamless hot-rolled steel tubes for hydraulic pillar service
ISSUED ON: OCTOBER 12, 2022
IMPLEMENTED ON: MAY 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 7
4 Order content ... 7
5 Size, shape, weight and allowable deviation... 8
6 Technical requirements ... 10
7 Test methods ... 14
8 Inspection rules ... 15
9 Packaging, marking and quality certificate ... 16
Seamless hot-rolled steel tubes for hydraulic pillar service
1 Scope
This document specifies the order content, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of seamless hot-rolled steel tubes for hydraulic pillar service. This document applies to the seamless hot-rolled steel tubes for cylinders and pillars used in the manufacture of coal mine hydraulic support cylinders and pillars. It also applies, as a reference, to seamless hot-rolled steel tubes for other hydraulic cylinders and pillars.
2 Normative references
The following documents are normatively referenced in this document and are indispensable for its application. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document.
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 223.11, Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration 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 223.26, Iron, steel and alloy - Determination of molybdenum content - The thiocyanate spectrophotometric method
GB/T 223.40, Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.49, Methods for chemical analysis of iron, steel and alloy - Extraction separation-chlorophosphonazo mA spectrophotometric method for the
determination of the total rare earth 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 223.63, 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 and iron - 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 229, Metallic materials - Charpy pendulum impact test method
GB/T 231.1, Metallic materials - Brinell hardness test - Part 1: Test method GB/T 1979, STANDARD diagrams for macrostructure and defect of structural steels 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 5777-2019, 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 7735-2016, Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections
5.4.2.1 As required by the buyer, after it is negotiated between the supplier and the buyer, and indicated in the contract, steel tubes can be delivered according to the specific length or the multiple length.
5.4.2.2 When steel tubes are delivered in specific length or multiple length, the allowable deviation of the length shall meet the following requirements: a) +30 0 mm, when the specific length or the total multiple length is not greater than 6 000 mm;
b) +50 0 mm, when the specific length or the total multiple length is greater than 6 000 mm.
5.4.2.3 When steel tubes are delivered in multiple length, allowances shall be made for each cut according to the following regulations:
a) 5 mm ~ 10 mm, when the outer diameter is not greater than 159 mm;
b) 10 mm ~ 15 mm, when the outside diameter is greater than 159 mm.
5.5 Curvature
The curvature per meter of the steel tube shall not be greater than the following: a) 1.3 mm/n, when the wall thickness is not greater than 15 mm;
b) 1.5 mm/n; when the wall thickness is greater than 15 mm ~ 30 mm;
c) 2.0 mm/n, when the wall thickness is greater than 30 mm.
5.5.2 The full-length curvature of the steel tube shall not exceed 0.10% of the length of the steel tube.
5.6 Out-of-roundness and wall unevenness
As required by the buyer, after it is negotiated between the supplier and the buyer and indicated in the contract, the out-of-roundness and wall unevenness of the steel tube shall not exceed 80% of the outer diameter tolerance and wall thickness tolerance respectively.
5.7 End shape
The end faces of the steel tube shall be perpendicular to the axis of the steel tube; the burrs of the cut shall be removed.
5.8 Weight
chemical composition of the finished steel tube shall comply with the provisions of GB/T 222.
6.2 Manufacturing method
6.2.1 Smelting method of steels
Steels shall be smelted by the method of electric arc furnace plus out-of-furnace refining or oxygen converter plus out-of-furnace refining. After negotiation between the supplier and the buyer, other methods of higher requirements can be used for smelting. 6.2.2 Manufacturing method of tube blank
The tube blank can be manufactured by continuous casting, die casting or hot rolling (forging). The continuous cast tube blank shall comply with the regulations of YB/T 4149; the hot rolled (forged) tube blank shall comply with the regulations of YB/T 5221 or YB/T 5222; die-cast tube blank can be implemented in accordance with the regulations for hot-rolled (forged) tube blank.
6.2.3 Manufacturing method of steel tubes
The steel tubes shall be manufactured by hot-rolled seamless method.
6.3 Delivery state
Steel tubes shall be delivered in hot rolled state. As required by the buyer, after it is negotiated between the supplier and the buyer and specified in the contract, the steel tubes can be delivered in the annealed or quenched and tempered state.
6.4 Mechanical properties
6.4.1 Tensile
6.4.1.1 For steel tubes of the designations 35 and 45, the longitudinal tensile properties at room temperature in the delivery state shall meet the requirements in Table 3. When the steel tubes of designations 27SiMn, 27SiMnRE, 30CrMnSi, 30CrMo and
30MnNbRE are delivered in the hot-rolled or annealed state, the longitudinal tensile properties at room temperature of the samples made from the sample blanks after heat treatment shall meet the requirements in Table 3.
imperfections that do not exceed the allowable lower deviation of wall thickness are allowed to exist.
6.8 Non-destructive testing
As required by the buyer, after it is negotiated between the supplier and the buyer and specified in the contract, the steel tube can be non-destructively tested in one or more of the following methods:
a) For ultrasonic testing carried out according to the provisions of GB/T 5777-2019, the acceptance level is U3;
b) For eddy current testing carried out according to the provisions of GB/T 7735- 2016, the acceptance level is E3H or E3;
c) For magnetic flux leakage testing carried out according to the provisions of GB/T 12606-2016, the acceptance level is F3.
7 Test methods
7.1 Sampling for chemical composition analysis of steel tubes shall comply with the rules of GB/T 20066. The chemical composition analysis usually complies with the provisions of GB/T 4336, GB/T 20123 or other general methods, and the arbitration shall comply with GB/T 223.5, GB/T 223.11, GB/T 223.12, GB/T 223.19, GB/T 223 .23, GB/T 223.26, GB/T 223.40, GB/T 223.49, GB/T 223.59, GB/T 223.63, GB/T 223.85 and GB/T 223.86.
7.2 The size and shape of the steel tubes shall be measured one by one by gauges that meet the accuracy requirements.
7.3 The inner and outer surfaces of steel tubes shall be inspected visually under full lighting conditions.
7.4 The sampling methods and test methods for other inspection items of steel tubes shall meet the requirements of Table 6.
8 Inspection rules
8.1 Inspection and acceptance
The inspection and acceptance of steel tubes shall be carried out by the supplier?€?s quality and technical supervision department.
8.2 Batch rules
8.2.1 Steel tubes shall be inspected and accepted in batches.
8.2.2 If the steel tube is not subjected to heat treatment after being cut into individual pieces, all the tube sections cut from the steel tube rolled from one tube blank can be regarded as one.
8.2.3 Each batch of steel tubes shall consist of steel tubes of the same designation, same furnace number, same specification, and same heat treatment system (heat). The quantity of each batch of steel tubes shall not exceed the following provisions: a) 200 pieces, when the outer diameter is not greater than 351 mm;
b) 50 pieces, when the outer diameter is greater than 351 mm.
8.2.4 If the number of remaining steel tubes is not less than 50% of the above-mentioned stipulations, it shall be listed as a single batch; if it is less than 50% of the above regulations, it can be merged into adjacent batch of the same designation, the same heat number, the same specification and the same heat treatment specification (heat). 8.3 Sampling quantity
The sampling quantity for each inspection of each batch of steel tubs shall meet the requirements of Table 6.
8.4 Re-inspection and determination rules

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