PDF GB/T 32259-2015 English
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Non-destructive testing of welds -- Visual testing of fusion-welded joints
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GB/T 32259-2015: PDF in English (GBT 32259-2015) GB/T 32259-2015
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 25.160.40
J 33
Non-destructive testing of welds –
Visual testing of fusion-welded joints
(ISO 17637.2003, MOD)
ISSUED ON. DECEMBER 10, 2015
IMPLEMENTED ON. JULY 01, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Test conditions and equipment ... 4
4 Personnel qualification ... 5
5 Visual inspection ... 5
6 Test records ... 9
APPENDIX A (Informative) Examples of test equipment ... 10
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard, through the re-drafting method, modifies and adopts the ISO
17637.2003 “Non-destructive testing of welds – Visual testing of fusion-welded
joints”.
The technical differences between the standard and ISO 17637.2003 and the
reasons are as follows.
- In order to meet the technical conditions in China, ADD Chapter 2
“normative references”, including GB/T 9445, GB/T 19418, GB/T 22087;
AND in the references, DELETE ISO 5817, ISO 9712, ISO 10042.
This standard shall be under the jurisdiction of the National Welding
Standardization Technical Committee (SAC/TC 55).
The drafting organizations of this standard. Shanghai Materials Research
Institute, Jinan New Gil Machinery Co., Ltd., Shanghai COSCO Kawasaki
Heavy Industries Steel Co., Ltd., Luoyang Bearing Co., Ltd., Harbin Welding
Institute.
The main drafters of this standard. Jiang Wei, Yuan Zhaofu, Ding Jie, Jin Yufei,
Zhuang Zhiqiang, Liu Xuming, Chen Cuili, Su Jinhua.
Non-destructive testing of welds –
Visual testing of fusion-welded joints
1 Scope
This standard applies to the visual inspection of fusion-welds of metal materials;
AND it is also used for visual inspection of joints before welding.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this Standard.
GB/T 9445 Non-destructive testing – Qualification and certification of NDT
personnel (GB/T 9445-2008, ISO 9712.2005, IDT)
GB/T 19418 Arc welded joints in steel – Guidance on quality levels for
imperfections (GB/T 19418-2003, ISO 5817. 1992, IDT)
GB/T 22087 Arc-welded joints in aluminum and its alloys – Guidance on
quality level for imperfection (GB/T 22087-2008, ISO 10042.2005, IDT)
3 Test conditions and equipment
Surface light illuminance shall be at least 350 lx, BUT the recommended light
illuminance is 500 lx.
For direct visual inspection, within 600 mm of the surface to be tested, it shall
provide adequate viewing inspection space for the human eye, AND the
inspection angle shall be not less than 30° (see Figure 1).
The formed weld inspection shall determine whether the weld complies with the
application or product standard requirements or other mutually agreed
acceptance conditions, such as GB/T 19418 or GB/T 22087. Formed welds
shall be inspected at least in accordance with the requirements given in 5.4.2
to 5.4.5.
5.4.2 Cleaning and grinding
It shall inspect the weld, including.
a) Removal of all slag by manual or mechanical means, in order to avoid
concealing any defects;
b) No tool marks or striking marks;
c) When it is needed to grind the weld, AVOID the joint overheating caused
by grinding, grinding traces or uneven surface;
d) For the grinding of fillet welds and butt welds, the joints and base metal
transition shall be smooth.
If defects are found (due to grinding or other reasons), they shall be reported,
in order to take remedial action.
5.4.3 Outline and dimensions
It shall inspect the weld, including.
a) The shape of the weld and the weld reinforcement are to comply with the
acceptance criteria (see 5.4.1);
b) Weld surface is regular; weld wave shape and spacing show uniform and
satisfactory visual performance; if required by WPS, MEASURE the
distance between the last layer of weld bead and base metal as well as
the location of each weld bead;
c) The weld width of the whole joint is basically the same, complies with the
welding drawings or acceptance criteria (see 5.4.1); for butt welds, it shall
inspect the weld groove, in order to ensure that it is fully welded.
5.4.4 Weld root and surface
As for the visible weld parts, such as the single-sided butt weld root and weld
surface, it shall inspect them to determine the deviations from the acceptance
criteria (see 5.4.1).
It shall inspect the weld, including.
6 Test records
When it is required to inspect the records, the test report shall contain at least
the following information.
a) The name of the component manufacturer;
b) The name of the party to be tested, if different from item a);
c) The identification of the test object;
d) Material;
e) Joint type;
f) Material thickness;
g) Welding process;
h) Acceptance conditions;
i) Imperfections beyond the acceptance conditions and their location;
j) Test range referring to the drawing requirements;
k) The testing equipment used;
l) The inspection results referring to the acceptance conditions;
m) Name and date of inspection.
As for the welds subjected to the inspection AND qualified, it shall make mark
or identification at the appropriate location.
If it requires the permanent visual inspection record of the weld to be tested, it
is advisable to take photographs OR draw accurate sketches, or both, of any
imperfections.
References
[1] GB/T 20968 Non-destructive testing – Aids to visual inspection – Selection
of low-power magnifiers
[2] ISO 3599 Vernier callipers reading to 0.1 and 0.05 mm
[3] ISO 17635 Non-destructive testing of welds – General rules for fusion-welds
in metallic materials
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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