NB/T 47016-2023 PDF English
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| NB/T 47016-2023 | English | 260 |
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Mechanical property tests of product welded test coupons for pressure equipment
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| NB/T 47016-2011 | English | 85 |
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Mechanical property tests of product welded test coupons for pressure equipments [including Corrigendum 1]
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NB/T 47016-2023: Mechanical property tests of product welded test coupons for pressure equipment---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/NBT47016-2023
NB
ENERGY INDUSTRY STANDARD OF THE
PEOPLE��S REPUBLIC OF CHINA
ICS 25.160
CCS H 22
Replacing NB/T 47016-2011
Mechanical property tests of product welded test coupons
for pressure equipments
Issued on. DECEMBER 28, 2023
Implemented on. JUNE 28, 2024
Issued by. National Energy Administration
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 General... 6
5 Test coupon preparation... 7
6 Mechanical properties test category and specimen of test coupon... 9
7 Inspection method and qualified index... 11
8 Retest... 23
9 Other tests... 24
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
"Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents".
This document replaces NB/T 47016-2011 "Mechanical property tests of product
welded test coupons for pressure equipments". Compared with NB/T 47016-2011, in
addition to structural adjustments and editorial changes, the main technical changes are
as follows.
a) MODIFY the scope of application, adding the relevant provisions for welded test
coupons of zirconium products (see Chapter 1);
b) ADD the welded test coupons of the head split joint and spherical container
products [see 4.4 a) and 4.4 c)];
c) ADD the qualified indicators of tensile strength and bending performance of
zirconium container welded joints (see 7.1.4.1 and Table 3);
d) MODIFY the qualified indicators of full weld metal tensile test (see 7.1.4.2);
e) MODIFY the qualified indicators of impact absorption energy of boiler steel
welded joints (see 7.3.4 b)];
f) ADD the provisions for qualified indicators of impact absorption energy of welded
joints with two metal material codes as the parent material (see 7.3.4 c)].
Please note that some of the contents of this document may involve patents. The issuing
agency of this document does not assume the responsibility for identifying patents.
This document was proposed by AND shall be under the jurisdiction of the National
Technical Committee for Standardization of Boiler and Pressure Vessels (SAC/TC 262).
The drafting organizations of this document. Hefei General Machinery Research
Institute Co., Ltd., China Special Equipment Inspection and Research Institute, Dalian
Boiler and Pressure Vessel Inspection and Testing Institute Co., Ltd., Fushun Machinery
Equipment Manufacturing Co., Ltd., Lanzhou Lanshi Heavy Equipment Co., Ltd.,
Sinopec Engineering Construction Co., Ltd., Shanghai Boiler Plant Co., Ltd., China
Petroleum and Natural Gas First Construction Co., Ltd., Sinopec Nanjing Chemical
Machinery Co., Ltd., China Petroleum and Natural Gas Pipeline Science Research
Institute Co., Ltd., State Administration for Market Regulation, Shanghai Special
Equipment Supervision and Inspection Technology Research Institute, Harbin Boiler
Plant Co., Ltd., First Heavy Group Dalian Nuclear Power Petrochemical Co., Ltd.,
Guangxi Zhuang Autonomous Region Special Equipment Inspection and Research
Institute.
The main drafters of this document. Fang Wunong, Li Jun, Guo Chuanjiang, Hu Xihai,
Zhang Jianxiao, Ge Zhaowen, Dou Wanbo, Wang Jinguang, Wang Jiongxiang, Zhu
Ning, Nie Min, Sui Yongli, Chang Yanyan, Ji Fang, Gu Fuming, Li Yinan, Yuan Jijun,
Guo Guangfei, Yang Guoyi, Jiang Haiyi, Hu Weipeng.
This document is interpreted by the National Technical Committee for Standardization
of Boilers and Pressure Vessels (SAC/TC 262).
This standard replaces the standard previously issued as follows.
- JB/T 1614-1994;
- JB 4744-2000;
- NB/T 47016-2011.
Mechanical property tests of product welded test coupons
for pressure equipments
1 Scope
This document specifies the preparation of welded test coupons, specimen preparation,
inspection methods, qualified indicators for pressure equipment (boilers, pressure
vessels and pressure pipes).
This document is applicable to the mechanical and bending performance tests of welded
test coupons (including welded test plates, simulation rings, certification rings) of steel,
aluminum, titanium, copper, nickel, and zirconium pressure equipment products.
This document is not applicable to the mechanical and bending performance tests of
welded test coupons of gas cylinder products.
2 Normative references
The contents of the following documents constitute essential clauses of this document
through normative references in the text. Among them, 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 228 (all parts) Metallic materials - Tensile testing at ambient temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 2652 Destructive tests on welds in metallic materials - Longitudinal tensile
test on weld metal in fusion welded joints
GB/T 2653 Bend test methods on welded joints
GB/T 3375 Welding terminology
NB/T 47014 Welding procedure qualification for pressure equipments
3 Terms and definitions
The terms and definitions defined in GB/T 3375 and NB/T 47014 apply to this
document. If there is any inconsistency, the terms and definitions of NB/T 47014 shall
prevail.
4 General
4.1 In addition to complying with the provisions of this document, the mechanical
property inspection of product welded test coupons shall also comply with the
provisions of relevant safety technical specifications, standards, design documents.
4.2 The materials used for the test coupons shall be taken from qualified raw materials;
they shall be of the same standard, code (designation, steel grade), specification (limited
thickness), heat treatment state as the materials of the pressure equipment components
they represent.
4.3 Welded test coupons for pressure equipment products are divided into plate test
coupons and tubular test coupons; tubular test coupons refer to pipes and rings.
4.4 Welding of product welded test coupons.
4.5 Test coupon welding procedure
4.5.1 When the inspected welded joints undergo different welding procedures, the
welding procedure and conditions experienced by the test coupon shall be the same as
those of the welded joints they represent.
4.5.2 The welder of the test coupon shall be selected from the welders who weld the
pressure equipment components.
4.5.3 The test coupon shall be prepared according to the prepared special welding
procedure documents. The test coupon code, work order number or pressure equipment
number, and material code shall be clearly stated in the welding procedure documents.
4.6 After the test coupon has been inspected visually and tested non-destructively, it is
allowed to avoid welding defects and prepare specimens.
4.7 The specimen is allowed to be cold leveled before removing the weld excess height.
4.8 When the test coupon adopts two or more welding methods, or welding procedures
with different important factors and supplementary factors, the welded joints of all
welding methods or welding procedures shall be tested for mechanical properties and
bending properties.
4.9 The test coupon shall be marked with the following identification marks.
5 Test coupon preparation
5.1 The size and quantity of the test coupon shall meet the requirements for cutting the
test coupons (including those for re-testing). The test coupons can also be cut directly
on the weldment.
5.2 Test coupon size. The length of the plate test coupon is greater than or equal to 300
mm; the width is greater than or equal to 250 mm. The length of the tubular test coupon
is greater than or equal to 250 mm. See Figure 1 and Figure 2 for test coupon dimensions.
6 Mechanical properties test category and specimen of test coupon
6.1 When the relevant specifications, standards and design documents of pressure
equipment have impact test requirements for welded joints, product welded test
coupons shall be subjected to impact test.
6.2 The full weld metal tensile test is only applicable to the longitudinal welded test
coupons of Class A boiler drum and header components.
6.3 The allowable tolerance of the specimen size shall be determined in accordance
with the relevant standards or technical documents.
6.4 The mechanical properties and bending properties test category and the number of
specimens shall be in accordance with the provisions of Table 1.
6.5 Specimen position
6.5.1 The sampling position of plate test coupons shall be as shown in Figure 1.
6.5.2 The sampling position of tubular test coupons shall be as shown in Figure 2.
6.6 The length of the discarded part at both ends of the test coupon varies with the
welding method and plate thickness.
6.7 The specimen blank is cut by cold working method, or hot working method;
however, the oxide layer and other materials need to be removed by cold working
method to expose the metallic luster.
6.8 After the specimen passes the inspection and marked, it is stamped with a steel
stamp or permanent mark.
7 Inspection method and qualified index
7.1 Tensile test
7.1.1 Joint tensile specimen
7.1.1.1 Sampling and processing requirements.
7.1.1.2 Specimen form.
7.1.2 Full weld metal tensile specimen
The sampling position and processing of the full weld metal tensile specimen can be
carried out in accordance with the provisions of GB/T 2652.
7.1.3 Test method
The tensile test is carried out in accordance with GB/T 228, to determine the tensile
strength of the welded joint, the tensile strength, lower yield strength or plastic
elongation strength of the full weld metal.
7.2 Bending test
7.2.1 Test requirements
The tensile surface of the bending specimen shall include the weld metal, fusion zone,
heat affected zone of each welding method (or welding procedure with different
important factors).
7.2.2 Specimen form and processing
7.2.3 Test method
a) The bending test shall be carried out in accordance with GB/T 2653 and Table 3,
to determine the integrity and plasticity of the welded joint.
b) The weld center of the specimen shall be aligned with the axis of the pressure
head. During the side bend test, if there is a defect on the surface of the specimen,
the side with the more serious defect shall be used as the tensile surface.
c) The bending angle shall be measured when the specimen is under load.
7.2.4 Qualified indicators
After the specimen is bent to the specified angle, the weld, fusion zone, heat affected
zone on its tensile surface shall not have a single open defect, which has a length greater
than 3 mm in any direction. The corner opening defects of the specimen are not counted;
however, the length of the corner opening defects caused by lack of fusion, slag
3 or 10
inclusion or other internal defects shall be counted.
If the specimen thickness T �� 38 mm and two or more specimens are used, each
specimen shall meet the above requirements.
7.3 Impact test
7.3.1 The weld metal and heat affected zone of each welding method (or welding
procedure with different supplementary factors) shall be subjected to Charpy V-notch
impact test.
8 Retest
8.1 If a certain item of mechanical properties and bending properties test fails, it is
allowed to resample from the original test coupon for retest of unqualified items.
8.2 Specimens, test methods and qualified indicators
8.2.1 The cutting position, specimen preparation, test method of retest specimens shall
still be in accordance with the provisions of this document.
8.2.2 The qualified indicators of tensile test and bending test shall still be in accordance
with the provisions of 7.1 and 7.2; all retest specimens shall be qualified.
8.2.3 The average impact absorption energy of the two groups of 6 specimens before
and after the impact test shall not be lower than the specified value.
9 Other tests
For welded product test coupons with other requirements such as high temperature
tensile properties, corrosion resistance, hardness, the test methods and qualified
indicators shall comply with the relevant standards and design documents.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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