NB/T 47016-2023_English: PDF (NB/T47016-2023)
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Mechanical property tests of product welded test coupons for pressure equipments
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NB/T 47016-2023
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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 47016-2011
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| Standard ID | NB/T 47016-2023 (NB/T47016-2023) | | Description (Translated English) | (Mechanical property inspection of welded test pieces of pressure equipment products) | | Sector / Industry | Energy Industry Standard (Recommended) | | Word Count Estimation | 22,245 | | Date of Issue | 2023-12-28 | | Date of Implementation | 2024-06-28 | | Administrative Organization | National Technical Committee for Standardization of Boiler and Pressure Vessels | | Standard ID | NB/T 47016-2011 (NB/T47016-2011) | | Description (Translated English) | Mechanical property tests of product welded test coupons for pressure equipments [including Corrigendum 1] | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | H22 | | Classification of International Standard | 19.060 | | Word Count Estimation | 24,289 | | Date of Issue | 2011-07-01 | | Date of Implementation | 2011-10-01 | | Older Standard (superseded by this standard) | JB/T 4744-2000 | | Quoted Standard | GB/T 228; GB/T 229; GB/T 2653; NB/T 47014 | | Drafting Organization | Hefei General Machinery Research Institute | | Administrative Organization | National Standardization Technical Committee Boiler and Pressure Vessel | | Regulation (derived from) | ?National Energy Board Announcement 2011 No.3 | | Summary | This standard specifies the pressure equipment (boilers, pressure vessels and pressure piping) products welding specimen preparation, sample preparation, test methods and conformity index. This standard applies to steel, aluminum, titanium, copper and nickel specimens welded pressure equipment products mechanical properties and flexural properties testing. Product welding specimens containing product welding test plate, product inspection specimen, analog loop and forensic ring. This standard does not apply to cylinders. |
NB/T 47016-2023
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
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. When S11348 (06Cr13Al) steel is used to weld pressure equipment
without post-weld heat treatment, the parent material of the test coupon shall include
steel plates of each heat number.
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:
a) Plate test coupons of welded joints of longitudinal seams (including the spliced
joints of heads) shall be placed at the extended position of their welds and welded
at the same time as the welds they represent;
b) Tubular test coupons or plate test coupons used for welded joints of
circumferential seams shall be welded during the welding procedure of the
pressure equipment components they represent;
c) Plate test coupons of welded joints of spherical containers shall be welded during
the welding procedure of the manufacturing stage and installation stage of the
pressure equipment components they represent.
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.
4.5.4 The test coupon shall have welding records.
4.6 After the test coupon has been inspected visually and tested non-destructively, it is
different, 3 impact specimens shall be taken from the heat-affected zone on each
side;
c) For composite metals, only impact specimens shall be made on the base except as
specified in the design documents;
d) Low-carbon steel, Q345R and chromium-nickel austenitic steel test coupons can
be exempted from the heat-affected zone impact test;
e) For aluminum-magnesium alloys with a magnesium content exceeding 3%, only
the weld zone impact specimen shall be taken.
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. It shall not be less than 30 mm for manual welding;
it shall be not less than 40 mm for motorized welding and automatic welding.
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:
a) The tensile specimen shall include the welded joints of each welding method (or
welding procedure with different important factors) on the test coupon.
b) For composite metals, when the coating thickness is involved in the strength
calculation of the composite plate, the tensile specimen includes the coating and
the base layer; when the coating thickness is not involved in the strength
calculation of the composite plate, the tensile specimen removes the coating, the
transition layer weld metal in the base layer is not removed.
c) The weld excess of the specimen shall be removed by cold working method, to
the tensile surface of the face bending and back bending specimens shall be flush;
there shall be no scratches and damage on the tensile surface of the specimen.
b) The face bending and back bending specimens shall be in accordance with the
provisions of Figure 7 and Table 3.
1) The parent material category with serial number 1 in Table 3:
When T > 3 mm, take S = 3 mm and remove the excess thickness from the
compressive surface of the specimen;
When T ≤ 3 mm, S is as close to T as possible.
2) The parent material category other than serial number 1 in Table 3:
When T > 10 mm, take S = 10 mm and remove the excess thickness from the
compressive surface of the specimen;
When T ≤ 10 mm, S is as close to T as possible.
3) For plate and tubular test coupons with an outer diameter of Φ > 100 mm, the
specimen width B = 38 mm; when the outer diameter Φ of the tubular test
coupon is 50 mm ~ 100 mm, then and 8 mm ≤ B ≤ 38 mm;
when 10 mm ≤ Φ < 50 mm, then and the minimum is 8 mm; or
when Φ ≤ 25 mm, the test coupon is divided into four equal parts in the
circumferential direction for sampling.
c) See Figure 8 and Table 3 for transverse side bending specimens.
1) The thickness of the specimen with serial number 1 in Table 3 is 3 mm; the
thickness of the specimens other than serial number 1 in Table 3 is 10 mm.
2) When the specimen thickness T ≥ 10 mm, the specimen width B is close to or
equal to the test coupon thickness; however, when the test coupon thickness T
≥ 38 mm, it is allowed to test two or more specimens with a width B of 20 mm
~ 38 mm which is cut in the direction of the specimen thickness in a layered
manner instead of a full-width side bending specimen.
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.
For composite metal materials produced by rolling composite method and explosive
welding method, re-sampling test is allowed for delamination and cracks caused by
unbonded defects in the composite interface of the side bending specimen.
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.
7.3.2 Impact specimen:
a) Orientation: The longitudinal axis of the specimen shall be perpendicular to the
weld axis; the Charpy V-notch axis shall be perpendicular to the surface of the
parent material.
b) Sampling position: The sampling position on the thickness of the specimen is
shown in Figure 9; when a combined welding method is used, if the weld metal
and heat affected zone of a certain welding method (or welding procedure with
different supplementary factors) are not within the sampling range of Figure 9,
separate sampling can be performed on the test coupon.
c) Notch position: The notch axis of the weld metal specimen shall be located on the
center line of the weld.
The distance k -- from the notch axis of the heat-affected zone specimen to the
intersection of the longitudinal axis of the specimen and the fusion line -- is > 0
mm; it shall pass through the heat-affected zone as much as possible, see Figure
10 for details.
......
NB/T 47016-2011
ICS 19.160
H 22
INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
NB/T 47016-2011 (JB/T 4744)
Replacing JB 4744-2000
Mechanical Property Tests of Product Welded Test
Coupons for Pressure Equipment
ISSUED ON. JULY 01, 2011
IMPLEMENTED ON. OCTOBER 01, 2011
Issued by. National Energy Administration
NB
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative Reference ... 5
3 General Provisions ... 5
4 Coupon Preparation ... 7
6 Inspection Method and Qualified Indexes ... 10
7 Reinspection... 22
Announcement (Corrigendum) ... 24
Foreword
The main changes of this standard over JB 4744-2000 "Mechanical property tests of
product welded test coupons for steel pressure vessels" and JB/T 1614-1994
"Methods of mechanical property test for boiler pressure parts welded joints" are as
follows.
- The product welded test panel is modified into product welded test coupons;
- The application scope is enlarged from pressure vessels to boiler, pressure
vessels and pressure piping;
- Aluminum, titanium, copper and nickel product welded coupons are added and
tubulous coupons are added;
- "Symbol" of Chapter 3 in JB 4744-2000 is deleted and "General Provisions" is
increased;
- Preparation of coupons is modified in Chapter 5;
- The Category, sampling quantity and position of coupon mechanical property
inspection are modified in Chapter 6;
- Methods of tensile test and qualified indexes are modified in Chapter 7;
dimensions and test methods of bending samples are modified; sampling point,
quantity, inspection item and qualified indexes of impact test are modified;
- The requirements of reinspection in Chapter 8 are modified.
This standard shall replace the relevant contents in JB 4744-2000 and JB/T 1614,
from the implementation date.
This standard was proposed by and shall be under the jurisdiction of the National
Technical Committee on Boilers and Pressure Vessels of Standardization
Administration of China (SAC/TC 262).
Drafting organizations and staffs of this standard.
Hefei General Machinery Research Institute, Ge Zhaowen, Dou Wanbo, Fang
Wunong;
China Special Equipment Inspection and Research Institute, Shou Binan, Xie
Tiejun, Yang Guoyi.
Participating drafting organizations and staffs of this standard.
Mechanical Property Tests of Product
Welded Test Coupons for Pressure Equipment
1 Scope
This standard specifies the preparation, sample preparation, inspection method and
qualified indexes for pressure equipment’s (boiler, pressure vessels and pressure
piping) product welded coupons.
This standard is applicable to the inspection of mechanical property and bending
property for steel, aluminum, titanium, copper and nickel pressure equipment’s
product welded coupons.
The product welded coupons include product weld test plate, product inspection
coupons, simulating loop and certification loop.
This standard is not applicable to gas cylinders.
2 Normative Reference
The following referenced documents are indispensable references, only the edition
cited applies. For dated references, only the dated edition of the normative reference
referred to applies. For the undated normative references, the latest editions
(including all amendments) apply.
GB/T 228 Metallic Materials - Tensile Testing
GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method
GB/T 2653 Bend Test Methods on Welded Joints
NB/T 47014 Welding Procedure Qualification for Pressure Equipment
3 General Provisions
3.1 In addition to the requirements of this standard, the inspection of mechanical
property for product welded coupons shall also be in accordance with the relevant
requirements of safety technical codes, standards and design documents.
3.2 Materials used for coupons shall be of the same standard, code (mark and steel
grade), specification (only for thickness and outside diameter) and heat treatment
state with materials used for components of pressure equipment. Where 06Cr13Al
steel is adopted to weld pressure equipment and post-weld heat treatment is not
carried out, the base metal of coupons shall include steel plate of each furnace
number.
3.3 The pressure equipment product welded coupons are classified into plate
coupons and tubulous coupons. Tubulous refers to pipeline and loop.
3.4 The arrangement of product welded coupons.
a) The plate coupon of shell ring longitudinal joints shall be arranged at the
prolongation of its welding line; it shall be welded simultaneously with the shell
ring that it represents.
b) The tubulous coupons or plate coupons used for circumferential joints shall be
welded in the welding process of components of pressure equipment which it
represents.
3.5 Welding procedure of coupons
3.5.1 Where the inspected welded joints are subjected to different welding
procedures, the welding procedure and condition of the coupons shall be the same
with those of the welded joints that coupons represent; coupons shall be prepared
with practical welding procedure (includes post-weld heat treatment) which can bring
lower mechanical property.
3.5.2 Welders for welding the coupon shall be the one participates in welding the
pressure equipment components.
3.5.3 Coupons shall be prepared according to the special welding process
documents. Coupon code, work order number or pressure equipment number and
material code shall be indicated clear in the welding process documents.
3.5.4 Coupons shall be equipped with welding records.
3.6 Repair coupon welding line is permissible and the repair process shall be the
same with the repair process of pressure equipment components.
3.7 After being carried out appearance inspection and nondestructive testing,
coupons shall be sampled at the position where free from defect and imperfection.
3.8 The sample shall be allowed for cool leveling before removing welded joint
reinforcement.
3.9 Where two or more than two kinds of welding methods are adopted or welding
procedure with different key factors and supplemental factors are adopted, all weld
different; three impact samples shall be taken at each side of heat affected zone.
5.4.3 Except for requirements of design documents, the composite metal shall be
prepared of impact sample only at the basement layer.
5.4.4 Impact test at heat affected zone of low carbon steel, Q345R and austenitic
chromium-nickel steel coupons is permissible to be omitted.
5.4.5 Aluminum magnesium alloy whose magnesium content exceeds 3% shall be
prepared of impact samples only at the weld zone.
5.5 Sample position
5.5.1 The sampling position of plate sample is detailed in Figure 1; the impact
sample position used for reinspection remains unchanged.
5.5.2 The sampling position of tubulous coupons is detailed in Figure 2.
5.6 The length of rejection part at both ends of coupons shall be subject to welding
method and plate thickness, it shall not be less than 30mm for manual welding, and
not be less than 40mm for motorized welding and automatic welding. If there are arc
starting plate and run off plate, the parts at the both ends of coupon may be rejected
or not.
5.7 Sample blank shall be made with cold process and hot working method but the
heat affected zone shall be neglected.
5.8 After the sample inspection is qualified and marked with lines, steel seal or
permanent marking shall be printed.
6 Inspection Method and Qualified Indexes
6.1 Tensile test
6.1.1 Tensile samples for joints
6.1.1.1 Sampling and processing requirements.
a) Tensile samples shall be taken from the heat affected zone and each kind of
weld metal of each welding method (or welding process);
b) As for composite metal, where the coating thickness is involved in calculating
the composite board strength, the tensile sample shall include the coating and
basement layer; where the coating thickness is not involved in calculating the
composite board strength, the tensile sample shall omit the coating and its
weld metal;
c) The weld reinforcement of samples shall be removed with cold process to
make it be flush with base metal;
d) Coupons whose thickness less than or equal to 30mm, samples of through
thickness shall be adopted to conduct an experiment; the sample thickness
shall be equal to or close to the base material thickness of coupons T;
e) When the testing machine is unable to carry out the tensile test of full thickness
due to capacity restriction, the coupon may be uniformly sampled in layer at
thickness direction, and the sample preparation thickness after equation shall
be close to the maximum thickness of testing machine bearing test. Two or
multiple sample test after equation may replace the test of one full thickness
sample.
6.1.1.2 Sample form.
a) Tensile sample of compact type plate joint with shoulder plate (see Figure 3) is
applicable to the plate coupon of all thickness;
b) Tensile sample of compact type pipe joint with shoulder plate, type I (see
Figure 4) is applicable to all tubulous coupons whose outer diameter is greater
than 76mm;
c) Tensile sample of compact type pipe joint with shoulder plate, type II (see
Figu...
......
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Similar PDFs (Auto-delivered in 9 seconds): NB/T 47016-2011
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