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GB/T 13296-2023 PDF in English


GB/T 13296-2023 (GB/T13296-2023, GBT 13296-2023, GBT13296-2023)
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GB/T 13296-2023English290 Add to Cart 0-9 seconds. Auto-delivery. Seamless stainless steel tubes for boiler and heat exchanger Valid

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Standards related to: GB/T 13296-2023

GB/T 13296-2023: PDF in English (GBT 13296-2023)

GB/T 13296-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
CCS H 48
Replacing GB/T 13296-2013
Seamless Stainless Steel Tubes for Boiler and Heat
Exchanger
ISSUED ON: NOVEMBER 27, 2023
IMPLEMENTED ON: JUNE 1, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 7
4 Classification and Code ... 7
5 Order Content ... 8
6 Dimensions, Shapes, Weights and Allowable Deviations ... 8
7 Technical Requirements ... 11
8 Test Methods ... 19
9 Inspection Rules ... 20
10 Packaging, Marking and Quality Certificate ... 21
Appendix A (normative) Specified Plastic Elongation Strength at High Temperatures
... 22
Appendix B (informative) Recommended Data of 100,000 h Endurance Strength ... 23
Seamless Stainless Steel Tubes for Boiler and Heat
Exchanger
1 Scope
This document specifies the classification and code, order content, dimensions, shapes, weights,
allowable deviations, technical requirements, test methods, inspection rules, packaging,
marking and quality certificate of seamless stainless steel tubes for boiler and heat exchanger.
This document is applicable to seamless stainless steel tubes for boiler and heat exchanger
(hereinafter referred to as steel tubes).
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or
Potentiometric Titration Method
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 223.19 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 223.25 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 223.28 Methods for Chemical Analysis of Iron, Steel and Alloy - The α-benzoinoxime
Gravimetric Method for the Determination of Molybdenum Content
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 4340.1 Metallic Materials - Vickers Hardness Test - Pat 1: Test 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 6394 Determination of Estimating the Average Grain Size of Metal
GB/T 7735-2016 Automated Eddy Current Testing of Seamless and Welded (except submerged
arc-welded) Steel Tubes for Detection of Imperfections
GB/T 11170 Stainless Steel - Determination of Multi-element Contents - Spark Discharge
Atomic Emission Spectrometric Method (routine method)
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
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
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
3 Terms and Definitions
The terms and definitions defined in GB/T 30062 are applicable to this document.
4 Classification and Code
4.1 In accordance with the manufacturing mode, the steel tubes are classified into two types.
The categories and codes are:
a) Hot rolled (extruded) steel tubes W-H;
b) Cold drawn (rolled) steel tubes W-C.
4.2 The following codes are applicable to this document:
D nominal outer diameter (unit: mm);
S nominal wall thickness (unit: mm);
Smin minimum wall thickness (unit: mm);
Sc average wall thickness (the average value of the maximum and minimum wall
thickness calculated based on the minimum wall thickness and its allowable deviation,
unit: mm).
5 Order Content
The contract or order for steel tubes based on this document includes, but is not limited to the
following contents:
a) Serial No. of this document;
b) Product name;
c) Steel designation;
d) Dimensions and specifications (outer diameter  wall thickness, unit: mm);
e) The quantity ordered (total weight, total length or quantity);
f) Manufacturing method;
g) Other special requirements.
6 Dimensions, Shapes, Weights and Allowable Deviations
6.1 Outer Diameter and Wall Thickness
6.1.1 Unless otherwise specified in the contract, the steel tubes shall be delivered in accordance
with the nominal outer diameter (D) and minimum wall thickness (Smin). In accordance with the
requirements of the demand-side, through negotiation between the supply-side and the demand-
side, the steel tubes can be delivered in accordance with the nominal outer diameter and nominal
wall thickness (S).
6.1.2 The dimensions and specifications of the steel tubes shall comply with the stipulations of
GB/T 17395. In accordance with the requirements of the demand-side, through negotiation
between the supply-side and the demand-side, steel tubes of other dimensions other than those
specified in GB/T 17395 can be supplied.
6.1.3 When the steel tubes are delivered in accordance with the nominal outer diameter and
minimum wall thickness, the allowable deviations of the nominal outer diameter and minimum
wall thickness shall comply with the stipulations of Table 1. When the steel tubes are delivered
The steel tubes shall be manufactured using hot rolled (extruded) or cold drawn (rolled)
seamless method.
7.3 Delivery State
7.3.1 The steel tubes shall be heat treated and acid-pickled for delivery. The heat treatment
system of the steel tubes shall comply with the stipulations of Table 4. Steel tubes that have
been integrally ground, bored or heat treated in a protective atmosphere can be delivered
without acid-pickling.
7.3.2 In accordance with the requirements of the demand-side, through negotiation between the
supply-side and the demand-side, and statement in the contract, steel tubes containing titanium
(Ti) or niobium (Nb) stabilizing elements can be subjected to stabilizing heat treatment after
solid solution heat treatment. The stabilizing heat treatment system is determined by the supply-
side and the demand-side through negotiation.
7.4 Mechanical Properties
7.4.1 The room-temperature longitudinal tensile properties of heat-treated steel tubes shall
comply with the stipulations of Table 4.
7.4.2 In accordance with the requirements of the demand-side, through negotiation between the
supply-side and the demand-side, and statement in the contract, steel tubes with a wall thickness
of not less than 1.7 mm can be tested for Brinell hardness, Rockwell hardness or Vickers
hardness, and the value shall comply with the stipulations of Table 5.
7.4.3 In accordance with the requirements of the demand-side, through negotiation between the
supply-side and the demand-side, and statement of test temperature in the contract, steel tubes
with designations 07Cr19Ni10, 07Cr19Ni11Ti and 07Cr18Ni11Nb can be subjected to high-
temperature tensile test, and their specified plastic elongation strength (Rp0.2) value at high
temperatures shall comply with the stipulations of Appendix A. When the demand-side requires
high-temperature tensile strength (Rm) value, the value shall be determined by the supply-side
and the demand-side through negotiation.
7.4.4 See Appendix B for the recommended 100,000 h endurance strength data of steel tubes
with designations 07Cr19Ni10, 07Cr19Ni11Ti and 07Cr18Ni11Nb.
Where,
H---the distance between two plates, expressed in (mm);
α---deformation coefficient per unit length, for austenitic steel tubes, α is 0.09, for other steel
tubes, α is 0.07;
S---the nominal wall thickness or average wall thickness (when delivered in accordance with
the minimum wall thickness) of the steel tubes, expressed in (mm);
D---the nominal outer diameter of the steel tubes, expressed in (mm).
7.6.2 Flaring
Steel tubes with an outer diameter not greater than 150 mm and a wall thickness not greater
than 10 mm shall undergo a flaring test. The top core taper of the flaring test is 60. The flaring
rate of the outer diameter of the specimen after flaring shall respectively be: 18% for austenitic
steel tubes and 15% for other steel tubes; after flaring, the specimen shall not manifest any
cracks or cracking.
7.7 Corrosion
7.7.1 Steel tubes with designations 07Cr19Ni10, 16Cr23Ni13, 20Cr25Ni20, 07Cr17Ni12Mo2,
07Cr19Ni11Ti and 07Cr18Ni11Nb do not need to undergo intergranular corrosion test, and
other austenitic steel tubes shall undergo intergranular corrosion test. The intergranular
corrosion test is performed in accordance with Method E in GB/T 4334-2020. After the test, the
specimen shall not manifest a tendency of intergranular corrosion.
7.7.2 Through negotiation between the supply-side and the demand-side, and statement in the
contract, the demand-side may specify other test methods for corrosion.
7.8 Grain Size
The grain size level of steel tubes 07Cr19Ni10, 07Cr17Ni12Mo2, 07Cr19Ni11Ti and
07Cr18Ni11Nb shall be Level-4 ~ Level-7.
7.9 Non-destructive Testing
7.9.1 The steel tubes shall be subjected to ultrasonic testing one by one in accordance with the
stipulations of GB/T 5777-2019, and the acceptance level shall be U2.
7.9.2 In accordance with the requirements of the demand-side, through negotiation between the
supply-side and the demand-side, and statement in the contract, other non-destructive testing
methods and acceptance levels can be used.
7.10 Surface Quality
7.10.1 There shall be no cracks, folds, crimps, delamination and scarring on the inner and outer
surfaces of the steel tubes. These defects shall be completely removed. The surface of the steel
tubes where the defects are removed shall be round and smooth, without edges and corners, and
the actual wall thickness at the position of removal shall not be less than the minimum allowable
wall thickness.
7.10.2 The allowable depth of straight tracks on the inner and outer surfaces of the steel tubes
shall comply with the following stipulations:
a) For cold drawn (rolled) steel tubes: not greater than 4% of wall thickness, and not
greater than 0.2 mm;
b) Hot rolled (extruded) steel tubes: not greater than 5% of wall thickness, and not
greater than 0.4 mm.
7.10.3 Other local defects not exceeding the lower deviation of wall thickness are allowed to
exist.
8 Test Methods
8.1 The chemical composition analysis and sampling of the steel tubes shall comply with the
rules of GB/T 20066. Generally speaking, the chemical composition analysis complies with
GB/T 11170, GB/T 20123, GB/T 20124 or other universal methods. During arbitration, the
stipulations of GB/T 223.11, GB/T 223.18, GB/T 223.19, GB/T 223.23, GB/T 223.25, GB/T
223.26, GB/T 223.28, GB/T223.36, GB/T 223.37, GB/T 223.40, GB/T 223.59, GB/T 223.60,
GB/T 223.63, GB/T 223.84, GB/T 223.85, GB/T 223.86, YB/T 4395 and YB/T 4396 shall be
followed.
8.2 The dimensions and shapes of the steel tubes shall be measured one by one using a
measuring tool that complies with the accuracy requirements.
8.3 The inner and outer surfaces of the steel tubes shall be visually inspected one by one under
sufficient illumination conditions. The depth of the straight track shall be measured with a
measuring tool that complies with the accuracy requirements.
8.4 The sampling methods and test methods for other inspection items of the steel tubes shall
comply with the stipulations of Table 6.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.