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GB/T 5310-2017 English PDF (GBT5310-2017)

GB/T 5310-2017 English PDF (GBT5310-2017)

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GB/T 5310-2017: [Including 2019XG1] Seamless steel tubes and pipes for high pressure boiler

This Standard specifies the classification, code, dimensions, shapes, masses, technical requirements, samples, test methods, inspection rules, packing, marking, and quality certification of seamless steel tubes and pipes for high pressure boiler. This Standard is applicable to seamless steel tubes-pipes for the manufacture of steam boiler and pipeline of high pressure and above.
GB/T 5310-2017
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.75
H 48
Replacing GB/T 5310-2008
Seamless steel tubes and pipes for
high pressure boiler
ISSUED ON: DECEMBER 29, 2017
IMPLEMENTED ON: SEPTEMBER 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Classification and code ... 9
4 Order content ... 9
5 Dimensions, shapes, masses, and tolerances ... 10
6 Technical requirements ... 14
7 Samples ... 31
8 Inspection and test methods ... 32
9 Inspection rules ... 34
10 Packing, marking, and quality certification ... 35
Appendix A (Normative) High-temperature specified plastic elongation strength ... 36
Appendix B (Informative) Recommended data on 100000 h endurance strength ... 37
Seamless steel tubes and pipes for
high pressure boiler
1 Scope
This Standard specifies the classification, code, dimensions, shapes, masses, technical requirements, samples, test methods, inspection rules, packing, marking, and quality certification of seamless steel tubes and pipes (tubes- pipes) for high pressure boiler.
This Standard is applicable to seamless steel tubes-pipes for the manufacture of steam boiler and pipeline of high pressure and above.
2 Normative references
The following documents are indispensable for the application of this document. For the dated references, only the editions with the dates indicated are applicable to this document. For the undated references, the latest edition (including all the amendments) are 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 223.9 Iron, steel and alloy - Determination of aluminium content - Chrome azurol S photometric method
GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method
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
GB/T 223.36 Methods for chemical analysis of iron, steel and alloy - The neutral titration method for the determination of nitrogen content after distillation separation
GB/T 223.38 Methods for chemical analysis of iron, steel and alloy - The anion-exchange separation-gravimetric method for the determination of
niobium content
GB/T 223.40 Iron, Steel and Alloy - Determination of Niobium Content by the Sulphochlorophenol S Spectrophotometric Method
GB/T 223.43 Iron, steel and alloy - Determination of tungsten content - Gravimetric method and spectrophotometric method
GB/T 223.47 Methods for chemical analysis of iron, steel and alloy - The carrier precipitation-molybdenum blue photometric method for the
determination of antimony content
GB/T 223.50 Methods for chemical analysis of iron, steel and alloy - The phenylfuorone-CTMAB direct photometric method for the determination of tin content
GB/T 223.58 Methods for chemical analysis of iron, steel and alloy - The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
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 4340.1 Metallic materials - Vickers hardness test - Part 1: Test method GB/T 5777-2008 Seamless Steel Pipe and Tubing Methods for Ultrasonic
Testing
GB/T 6394-2017 Metal - Methods for estimating the average grain size
GB/T 7735-2016 Automated eddy current testing of seamless and welded
(except submerged arc-welded) steel tubes for detection of imperfections GB/T 10561-2005 Steel - Determination of Content of Nonmetallic Inclusions - Micrographic Method Using Standards Diagrams
GB/T 11170 Stainless steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (Routine method)
GB/T 12606-2016 Automated full peripheral flux leakage testing of seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for
the detection of longitudinal and/or transverse imperfections
GB/T 13298 Inspection methods of microstructure for metals
GB/T 15822 (all parts) Non-destructive testing - Magnetic particle testing 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
GB/T 31925-2015 Ultrasonic test methods of heavy wall thickness seamless steel pipes and tubes
NB/T 47013.5 Nondestructive testing of pressure equipment - Part 5:
c) Steel designation;
d) The quantity ordered (total mass or total length);
e) Dimensions and specifications;
f) Special requirements.
5 Dimensions, shapes, masses, and tolerances
5.1 Outer diameter and wall thickness
5.1.1 Unless otherwise specified in the contract, the steel tubes-pipes are delivered according to nominal outer diameter and nominal wall thickness. According to the requirements of the purchaser, through negotiation between the supplier and the purchaser, the steel tubes-pipes may be delivered
according to the nominal outer diameter and minimum wall thickness, nominal inner diameter and nominal wall thickness, or other dimensions and
specifications.
5.1.2 The nominal outer diameter and wall thickness of the steel tubes-pipes shall comply with the provisions of GB/T 17395. According to the requirements of the purchaser, through negotiation between the supplier and the purchaser, steel tubes-pipes of dimensions other than those specified in GB/T 17395 may be supplied. When the steel tubes-pipes are delivered according to the nominal inner diameter and the nominal wall thickness, the dimensions and
specifications are determined by negotiation between the supplier and the purchaser.
5.1.3 When the steel tubes-pipes are delivered according to the nominal outer diameter and the nominal wall thickness, the tolerances of nominal outer diameter and nominal wall thickness shall comply with the requirements of Table 1.
5.1.4 When the steel tubes-pipes are delivered according to the nominal outer diameter and the minimum wall thickness, the tolerance of the nominal outer diameter shall comply with the requirements of Table 1; the tolerance of the wall thickness shall comply with the requirements of Table 2.
5.1.5 When the steel tubes-pipes are delivered according to the nominal inner diameter and the nominal wall thickness, the tolerance of the nominal inner diameter is ??1%d; the tolerance of the nominal wall thickness shall comply with the requirements of Table 1.
5.1.6 When the purchaser does not indicate the tolerance level for dimensions b) When 15 mm< S???30 mm, it is not more than 2.0 mm/m;
c) When S>30 mm, it is not more than 3.0 mm/m.
5.3.2 For steel tubes-pipes with D???127 mm, the full-length bending shall be no more than 0.10% of the length of the steel tube and pipe.
5.3.3 According to the requirements of the purchaser, through negotiation between the supplier and the purchaser, and indicated in the contract, other provisions may be adopted for the bending per meter and full-length bending of steel tubes-pipes.
5.4 Out-of-roundness and inhomogeneity of wall thickness
According to the requirements of the purchaser, through negotiation between the supplier and the purchaser, and indicated in the contract, the out-of- roundness and inhomogeneity of wall thickness of steel tubes-pipes shall not exceed 80% of the tolerances of outer diameter and wall thickness, respectively. 5.5 End shape
Both end faces of the steel tube and pipe shall be perpendicular to the axis of the steel tube and pipe. It shall remove the incision burrs.
5.6 Masses
5.6.1 Delivery mass
5.6.1.1 When the steel tubes-pipes are delivered according to the nominal outer diameter and the nominal wall thickness or the nominal inner diameter and the nominal wall thickness, the steel tubes-pipes are delivered according to the actual mass and may also be delivered according to the theoretical mass. 5.6.1.2 When the steel tubes-pipes are delivered according to the nominal outer diameter and the minimum wall thickness, the steel tubes-pipes are delivered according to the actual mass. Through negotiation between the supplier and the purchaser, and indicated in the contract, the steel tubes-pipes may also be delivered according to the theoretical mass.
5.6.2 Calculation of theoretical mass
The theoretical mass of steel tubes-pipes is calculated according to the provisions of GB/T 17395 (The density of steel is 7.85 kg/dm3). The theoretical mass of stainless (heat-resistant) steel tubes-pipes is 1.015 times the theoretical mass calculated according to GB/T 17395.
For the steel tubes-pipes delivered according to the minimum wall thickness, it indicated in the contract.
6.2.2 Manufacturing methods and requirements of tube billet
6.2.2.1 The tube billet may be produced by continuous casting, die casting, or hot rolling (forging).
6.2.2.2 Continuous cast tube billet shall comply with the provisions of YB/T 4149. The level of central cracks, intermediate cracks, subsurface cracks, and subsurface bubbles of macrostructure and defect shall be no more than Level 1, respectively. Other higher-quality requirements approved by the relevant parties may also be adopted. Hot-rolled (wrought) tube billet shall comply with the provisions of YB/T 5137. Die cast tube billet (steel ingot) may be carried out with reference to the provisions of hot-rolled (wrought) tube billet.
6.2.3 Manufacturing methods of steel tubes-pipes
6.2.3.1 Steel tubes-pipes of designation 08Cr18Ni11NbFG shall be
manufactured by cold drawing (rolling) seamless method. Other steel tubes- pipes shall be manufactured by hot rolling (extrusion, expansion) or cold drawing (rolling) seamless method.
6.2.3.2 The thermal expanded steel tube and pipe shall be a larger-caliber steel tube and pipe which is formed by expanding and deforming the billet steel tube and pipe after being integrally heated.
6.2.3.3 For steel tubes-pipes directly rolled by continuous cast or die cast billets, the total elongation coefficient of machining deformation shall not be less than 3. For steel tubes-pipes directly rolled by electroslag ingots, the total elongation coefficient of machining deformation shall not be less than 2.
c According to the requirements of the purchaser, the steel tubes-pipes of the designations 07Cr25Ni21NbN, 07Cr19Ni11Ti, and 07Cr18Ni11Nb, after the solution treatment, may be subjected to a stabilization heat treatment lower than the initial solution treatment temperature. The temperature of the stabilization heat treatment is negotiated between the supplier and the purchaser.
6.4 Mechanical properties
6.4.1 The room-temperature mechanical properties of the steel tube and pipe in the delivery state shall comply with the requirements of Table 7.
6.4.2 Steel tubes-pipes with D???76 mm and S???14 mm shall be subjected to
impact test. The impact absorbed energy in Table 7 is the required value for Charpy V-notch impact absorbed energy of the full-size sample. When using small-size impact samples, the minimum required value for Charpy V-notch impact absorbed energy of small-size samples shall be the required value for impact absorbed energy of the full-scale sample multiplied by the decline factor in Table 8.
6.4.3 The hardness test of steel tubes-pipes shall comply with the following requirements:
a) Steel tubes-pipes with S???5.0 mm shall be subjected to Brinell hardness test or Rockwell hardness test;
b) Steel tubes-pipes with S< 5.0 mm shall be subjected to Rockwell hardness test;
c) According to the requirements of the purchaser, through negotiation
between the supplier and the purchaser, and indicated in the contract, the steel tubes-pipes may be subjected to Vickers hardness test instead of
Brinell hardness test or Rockwell hardness test. When the contract
specifies Vickers hardness test for the steel tubes-pipes, the value shall comply with the requirements of Table 7.
6.4.4 According to the requirements of the purchaser, through negotiation between the supplier and the purchaser, and indicated in the contract, the hardness test may be carried out on the outer surface of steel tubes-pipes; the value shall comply with the provisions of Table 7.
6.4.5 According to the requirements of the purchaser, through negotiation between the supplier and the purchaser, and the test temperature is indicated in the contract, the supplier may do the high-temperature mechanical property test of the steel tube and pipe. When the contract specifies the high-
temperature specified plastic elongation strength (Rp0.2) of the steel tube and pipe, the value shall comply with the provisions of Appendix A.
resistant) steel, it is 0.09. When S/D>0.1, ?? of high-quality carbon
structural steel may be reduced by 0.01.
When the sample is pressed to a distance H between the two flat plates, there shall be no cracks or gaps on the sample.
b) The second step is the integrity test (closed flattening). The flattening continues until the sample breaks or the opposite walls of the sample
collide. During the entire flattening test, the sample shall not show visible delamination, white spots, inclusions.
6.6.1.3 The following situations shall not be used as the basis for determining whether the flattening test is qualified or not:
a) A crack or gap caused by surface defects of sample;
b) When S/D>0.1, cracks or gaps in the inner surface at the 6 o?€?clock (bottom) and 12 o?€?clock (top) positions of the sample.
6.6.1.4 In case of controversy for 6.6.1.3b), the outer wall of the steel tube and pipe may be turned to reduce the S/D to 0.1 and then the flattening test is carried out. The test method, the distance H between the two flat plates (calculated according to the actual outer diameter and wall thickness after turning), and the judgment requirements shall comply with the provisions of 6.6.1.2.
6.6.2 Bending
6.6.2.1 For steel tubes-pipes with D>400 mm or S>40 mm, a bend test instead of the flattening test may be adopted. A set of bend tests shall include a forward bend (The sample surface near the outer surface of the steel tube and pipe is deformed by tension) and a reverse bend (The sample surface near the inner surface of the steel tube and pipe is deformed by tension).
6.6.2.2 The diameter of bending core of bend test is 25 mm. The sample shall, at room temperature, be bent at 180??.
6.6.2.3 After the bend test, there shall be no visible cracks or gaps on the bent tensile surface and side of the sample.
6.6.3 Drift-expanding
According to the requirements of the purchaser, and indicated in the contract, the steel tubes-pipes with D???76 mm and S???8 mm may be subjected to the drift- expanding test. The drift-expanding test is carried out at room temperature. The top core taper is 60??. The drift-expanding ratio of the outer diameter of the e) 10Cr9Mo1VNbN, 10Cr9MoW2VNbBN, 10Cr11MoW2VNbCu1BN, and
11Cr9Mo1W1VNbBN shall be tempered martensite or tempered sorbite
which maintains the martensite phase. For 10Cr9MoW2VNbBN with an
outer diameter greater than 150 mm or a wall thickness greater than 20
mm, USE a metallographic microscope (Recommended magnification is
100 times) to examine 10 square fields of view with a size of 0.71
mm??0.71 mm. TAKE the average of 10 fields of view. The ??-ferrite content shall not exceed 5%. The most serious field of view shall not exceed 10%. 6.11 Decarburization
Cold-drawn (rolled) high-quality carbon structural steel and alloy structural steel tube and pipe products with D???76 mm shall be inspected for full decarburization. The depth of the full decarburization on the outer surface shall be no more than 0.2 mm. The depth of the full decarburization on the inner surface shall be no more than 0.3 mm. The sum of the two shall be no more than 0.4 mm.
6.12 Intergranular corrosion
According to the requirements of the purchaser, through negotiation between the supplier and the purchaser, and indicated in the contract, stainless (heat- resistant) steel tubes-pipes may be subjected to intergranular corrosion test. Intergranular corrosion test method and judgment requirements are determined by negotiation between the supplier and the purchaser.
6.13 Surface quality
6.13.1 The inner and outer surfaces of steel tubes-pipes shall be free of cracks, folds, scabs, rolling-folding, and separation layer. It shall completely remove these defects. The depth of defect removal shall not exceed 10% of the wall thickness. The actual wall thickness at the defect removal position shall not be less than the minimum allowed by the wall thickness.
6.13.2 The allowable depth of straights on the inner and outer surfaces of the steel tubes-pipes (including non-sharp mandrel scratches) shall comply with the following requirements:
a) Cold-drawn (rolled) steel tubes-pipes: It shall be no more than 4% of the wall thickness. The maximum is 0.2 mm;
b) Hot-rolled (extruded, expanded) steel tubes-pipes: It shall be no more than 5% of the wall thickness. The maximum is 0.4 mm.
6.13.3 Other partial imperfections which do not exceed the negative tolerance of wall thickness are allowed to exist.
When the wall thickness-outer diameter ratio of steel tubes-pipes is greater than or equal to 0.3, unless otherwise specified in the contract, the depth of the artificial defect of the inner wall of the steel tube and pipe shall be in accordance with the provisions of C.1 of Appendix C of GB/T 5777-2008.
6.14.2 When ...

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