GOST R ISO 17637-2014

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  ГОСТ Р ИСО 17637-2014

GOST R ISO 17637−2014 nondestructive testing. Visual inspection of joints made by fusion welding

GOST R ISO 17637−2014

NATIONAL STANDARD OF THE RUSSIAN FEDERATION

NONDESTRUCTIVE TESTING

Visual inspection of joints made by fusion welding

Non-destructive testing of welds. Visual testing of fusion-welded joints

OKS 25.160.40

Date of introduction 2016−01−01

Preface

1 PREPARED by FSUE «all-Russian research Institute of standardization and certification in engineering» (VNIINMASH) on the basis of their own authentic translation of the standard referred to in paragraph 4

2 SUBMITTED by the Technical Committee for standardization TC 364 «welding and allied processes"

3 APPROVED AND put INTO EFFECT by the Federal Agency for technical regulation and Metrology dated 30 September 2014 N 1241-St

4 this standard is identical with ISO 17637:2003* «nondestructive testing. Visual inspection of joints made by fusion welding» (ISO 17637:2003 «Non-destructive testing of welds — Visual testing of fusion-welded joints»).
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* Access to international and foreign documents referred to here and hereinafter, can be obtained by clicking on the link to the site shop.cntd.ru. — Note the manufacturer’s database.


In applying this standard it is recommended to use instead of the referenced international standards corresponding national standards of the Russian Federation, details of which are given in Appendix YES

5 INTRODUCED FOR THE FIRST TIME

6 REPRINT (may 2015) with the amendment published in the IUS N 7* 2015
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* The text of the document matches the original. — Note the manufacturer’s database.


Application rules of this standard are established in GOST R 1.0−2012 (section 8). Information about the changes to this standard is published in the annual (as of January 1 of the current year) reference index «National standards» and the official text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in a future issue of information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet (gost.ru)

Introduction

ISO 17637 was prepared by Technical Committee ISO/TC 44 «welding and allied processes," PC 5 «Testing and inspection of welds».

1 Scope

This standard covers visual inspection of joints of metallic materials made by fusion welding, and visual inspection of the preparation of joints for welding.

2 Conditions of control and technical equipment

Surface illuminance shall be not less than 350 Lux, 500 Lux is recommended.

When control should ensure that the distance from the eye to the surface about 600 mm and the angle of view of at least 30° (see figure 1).

Figure 1 — Access control

The location of the eye

Figure 1 — Access control

You should consider the possibility of remote control, using mirrors, periscopes, fibre optic cables or cameras if access control in accordance with figure 1, possible or remote monitoring prescribed in the applicable standard.

To detect defects can be used an additional light source to increase contrast and clarity.

If the result of the visual inspection is questioned, it should be supplemented by other methods of nondestructive testing.

Examples of technical means for visual inspection are given in Appendix A.

3 personnel Qualifications

Visual inspection of welded joints and evaluation of results for final acceptance should be performed by qualified personnel. It is recommended that the personnel have been certified in accordance with ISO 9712 or equivalent standard in force in a particular industry.

4 Visual inspection

4.1 General provisions

This standard does not establish the scope of visual control. It needs to be defined in advance, for example by reference to the applicable standard or product standard.

Personnel carrying out visual inspections, must have access to the necessary documentation.

Visual inspection before welding, during welding and the weld is made should be still possible for physical access control. Visual inspection may include the monitoring of surface treatment.

4.2 Visual inspection joint preparation for welding

If you need a visual inspection before welding, should ensure that:

a) the shape and size of the prepared edges correspond to the technical requirements of the weld procedure (WPS);

b) prepared for welding the edges and adjacent surfaces are clean and surface treatment made in accordance with the applicable standard or the standard for products;

c) welded details are properly locked against each other in accordance with the drawings or instructions.

4.3 Visual inspection during welding

If you require a visual inspection during welding, should ensure that:

a) each bead or layer of weld metal is cleaned before performing the following passage, special attention should be paid to transitions from weld metal to base metal;

b) there are no visible defects such as cracks or the sink; if defects are found, they should be reported to the next roller surfacing was undertaken corrective action;

c) transitions between the welding rollers and between the weld and the base metal is such that when the following passage will be provided with the necessary fusion;

d) depth and shape of the cuts comply with the WPS or the initial cutting complete removal subject to the correction of the weld;

e) the weld meets the original requirements of the WPS after any necessary corrections/corrective actions.

4.4 Visual inspection of the weld made

4.4.1 General provisions

Completed weld should be checked for compliance with the requirements of technical documentation of product standard or acceptance requirements, such as compliance to ISO 5817 or ISO 10042. Completed welds should be checked at least for compliance with the requirements given in 4.4.2−4.4.5.

4.4.2 cleaning and finishing

The weld should be checked to ensure that:

a) all slag is removed manually or mechanically in order to avoid concealment of defects;

b) no fingerprints from the use of hand tools;

c) prevented excessive heating of the connection when sanding, there are no signs of grinding, provided the uniformity of the shape of the weld, if you have requirements for finish;

d) to put the finishing of fillet and butt welded joints seam smoothly without offset is mated with the base metal.

If the detected defects (caused by trim or other factors), they should be reported, to take corrective action.

4.4.3 Shape and size

The weld should be checked to ensure that:

a) the shape and height of the convexity of the weld satisfies the acceptance requirements (see 4.4.1);

b) the surface of the weld is normal: the picture, step cheshuichatoe of the weld and its appearance is satisfactory; the distance between the last layer and the base metal to be measured or, where this is required, the distance between the rollers of the weld complies with WPS;

c) width of the weld is constant across the entire length and meets the acceptance requirements specified on drawing or in standard (see 4.4.1); cutting the butt joint is completely filled.

4.4.4 Root and the surface of the welded joint

Available for inspection items of a welded joint, that is, the unilateral root of the butt joint and the surface of welded joints should be checked for the presence of deviations from acceptance requirements (see 4.4.1).

The welded joint should be checked to ensure that:

a) the penetration, root concavity, burn-through and shrink all over unilateral butt welds are within acceptance requirements;

b) any undercut is within the acceptance requirements.

c) any defects such as cracks or pores on the weld surface or heat affected zone, discovered using the optionally optical means, satisfy acceptance requirements;

d) any items that were temporarily welded to the product to facilitate manufacture or Assembly, but prevent the execution of its functions, removed without damage to the product; the area where recorded additional detail must be checked for absence of cracks;

e) marks the initiation of the arc are within the acceptance requirements.

4.4.5 Heat treatment after welding

After the heat treatment may require additional tests.

4.5 Visual inspection of welds fixed

4.5.1 General provisions

If the welds are fully or partially do not meet acceptance requirements and required their correction by welding, to its implementation it is necessary to check compliance with the requirements of 4.5.2 and 4.5.3.

Fixed every weld needs to be re-inspected in accordance with the same requirements that were applied to the original seam.

4.5.2 Partially remote weld

The depth and length of the cut-out area of the weld must be sufficient to ensure removal of all defects. Tenderloin needs to be a wedge cut from the base to the surface of the deposited metal in its entirety. The width and shape of the area prepared for repair of the weld shall be such as to provide the required access to perform the welding.

4.5.3 Fully remote weld

If containing defects in the weld is removed completely, the shape and dimensions of the weld preparation of the new seam should meet the requirements made to the original seam, regardless of the necessity of applying paste or no need for them.

5 control Protocols

If you require control protocols, the Protocol must be enabled on at least the following information:

a) the name of performing a welding unit manufacturer;

b) name of the testing authority, if different from a);

c) identification of the inspection object;

d) material;

e) connection type;

f) the thickness of the material;

g) the welding process;

h) acceptance requirements;

i) defects that do not meet acceptance requirements, and their location;

j) the area of verification with reference to the drawings if necessary;

k) the device used for testing;

l) the test result with reference to the acceptance requirements;

m) name of the person who carried out the control, and its date.

Welds that have been tested and accepted, must be properly marked or identified.

If you want a constant visual check check the the weld must be performed photographs or accurate sketches or both with a clear indication of defects.

Annex a (informative). Examples of technical means for monitoring

Appendix A
(reference)

A. 1 the following is a list of technical tools that are typically used for visual inspection of welded joints:

a) a straight ruler or tape measure with divisions of not more than 1 mm;

b) a Vernier caliper ISO 3599;

c) a set with a sufficient number of probes for measurement of sizes from 0.1 mm to 3 mm with step 0.1 mm;

d) radius pass;

e) lenses with magnification from 2 to 5; preferably they have the scale, see ISO 3058;

f) lamps.

A. 2 May also require the following technical means:

a) a device for measuring the profile with a diameter or width of the wire is not more than 1 mm, each end of which is rounded;

b) material to obtain an impression of seams, such as plastic cold plastic or clay;

c) mirrors, endoscopes, borescopes, fiber optics tools, or a television camera for visual inspection of welds is of limited availability;

d) other measuring device, such as a specially designed to weld gauges, measuring instruments, altitude/depth, rulers, and protractors.

A. 3 Applied measuring devices and templates are listed in detail in table A. 1.

Note — These devices and the templates included as examples of measuring instruments. Some of the designs can present the object of patenting.


Table A. 1 — Template for measuring the size of the weld. Measuring ranges and accuracy

App YES (reference) Data on compliance with the reference international standards reference the national standards of the Russian Federation

App YES
(reference)

Table YES.1

Bibliography