GB/T 5310-2023 English PDF (GBT5310-2023)

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GB/T 5310-2023: Seamless steel tubes and pipes for high pressure boiler
GB/T 5310-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
CCS H 48
Replacing GB/T 5310-2017
Seamless steel tubes and pipes for high pressure boiler
ISSUED ON: SEPTEMBER 07, 2023
IMPLEMENTED ON: APRIL 01, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 10
4 Classification and code ... 10
5 Order content ... 11
6 Size, shape, weight and allowable deviation... 11
7 Technical requirements ... 16
8 Test sample ... 37
9 Test methods ... 38
10 Inspection rules ... 39
11 Packaging, marking and quality certificate ... 40
Appendix A (Informative) Optional special requirements for ordering ... 41
Appendix B (Informative) Comparison of designations in relevant domestic and foreign
standards ... 42
Appendix C (Informative) High temperature specified plastic elongation strength of
steel pipes ... 43
Appendix D (Informative) Recommended data for 100 000 h lasting strength of steel
pipes ... 44
Bibliography ... 47
Seamless steel tubes and pipes for high pressure boiler
1 Scope
This document stipulates the classification, code, order content, size, shape, weight,
technical requirements, samples, test methods, inspection rules, packaging, marking
and quality certificate of seamless steel tubes and pipes for high pressure boiler.
This document applies to the manufacture of seamless steel tubes and pipes (hereinafter
referred to as steel pipes) for boilers and pipelines of high pressure and above. It also
applies to seamless steel tubes and pipes for other high-temperature and pressure-
bearing equipment as a reference.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. 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 223.9, Iron, steel and alloy - Determination of aluminium content - Chrom
azurol S photometric method
GB/T 223.11, Iron, steel and alloy - Determination of chromium content - Visual
titration or potentiometric titration method
GB/T 223.12, 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 223.14, Methods for chemical analysis of iron, steel and alloy - The N-
benzoyl-N-phenylhydroxylamine extraction photometric method for the
determination of vanadium content
GB/T 223.18, Methods for chemical analysis of iron steel and alloy - The sodium
thiosulfate separation iodimetric method for the determination of cupper content
GB/T 32548, Steel and iron - Determination of tin, antimony, cerium, lead and
bismuth - Inductively coupled plasma mass spectrometric method
NB/T 47013.5, Nondestructive testing of pressure equipment - Part 5: Penetrant
testing
YB/T 4149, Continuously cast round billet for seamless steel tube rolling
YB/T 4395, Steel - Determination of molybdenum, niobium and tungsten contents -
Inductively coupled plasma atomic emission spectrometric method
YB/T 4396, Stainless steel - Determination of multi-element contents - Inductively
coupled plasma atomic emission spectrometric method
YB/T 5137, Hot rolled and wrought round blank for high-pressure seamless steel
tube
3 Terms and definitions
Terms and definitions determined by GB/T 30062 are applicable to this document.
4 Classification and code
4.1 The seamless steel tubes and pipes in this document are divided into two categories
according to the product manufacturing method. The categories and codes are as
follows:
a) Hot-rolled (extruded, expanded) steel tubes and pipes, code-named W-H;
b) Cold-drawn (rolled) steel tubes and pipes, code-named W-C.
4.2 For the purposes of this document, the following symbols apply.
D outside diameter (if not specified, including nominal outside diameter and/or
calculated outside diameter, in millimeters)
Dc calculated outside diameter (the outside diameter value calculated based on
the sum of the nominal inside diameter and the nominal wall thickness, in
millimeters)
d nominal inside diameter
S wall thickness (if not specified, including nominal wall thickness and/or
average wall thickness, in millimeters)
Sc average wall thickness (average of the maximum and minimum wall thickness
calculated based on the minimum wall thickness and its allowable deviation,
in millimeters)
Smin minimum wall thickness
5 Order content
5.1 The contract for ordering steel tubes and pipes according to this document includes
the following contents:
a) product name;
b) number of this document;
c) steel designation or unified digital code;
d) ordering quantity (total weight or total length);
e) dimensions.
5.2 The supplier and the buyer can negotiate to determine the optional special
requirements listed in Appendix A, and indicate them in the contract for ordering steel
pipes according to this document.
6 Size, shape, weight and allowable deviation
6.1 Outside diameter and wall thickness
6.1.1 Unless otherwise specified in the contract, steel tubes and pipes shall be delivered
according to the nominal outside diameter and the nominal wall thickness. According
to the requirements of the buyer and through negotiation between the supplier and the
buyer, steel tubes and pipes can be delivered according to the nominal outside diameter
and minimum wall thickness, nominal inside diameter and nominal wall thickness, or
other size specifications.
6.1.2 The nominal outside diameter and wall thickness of steel tubes and pipes shall
comply with the provisions of GB/T 17395. As required by the buyer, and negotiated
between the supplier and the buyer, steel tubes and pipes with dimensions other than
those specified in GB/T 17395 can be supplied. When steels tubes and pipes are
delivered according to the nominal inside diameter and nominal wall thickness, the size
specifications shall be determined by negotiation between the supplier and the buyer.
6.1.3 When steel tubes and pipes are delivered according to the nominal outside
diameter and nominal wall thickness, the allowable deviations of the nominal outside
diameter and nominal wall thickness shall comply with the provisions of Table 1.
6.2.2 Specific length and multiple length
6.2.2.1 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.
6.2.2.2 The allowable deviation of the specific length of steel tubes and pipes shall
comply with the following provisions:
a) When D≤325 mm, +15 0 mm;
b) When D >325 mm, +30 0 mm.
6.2.2.3 An allowance shall be left for each cutting of multiple length in accordance with
the following provisions:
a) When D ≤ 159 mm, the cutting allowance is 5 mm ~ 10 mm;
b) When D >159 mm, the cutting allowance is 10 mm ~ 15 mm.