EN 26520:1991
(Main)Classification of imperfections in metallic fusion welds, with explanations (ISO 6520:1982)
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- 05-Nov-1991
- 14-Oct-1998
- 25.160.40
- 87/404/EEC
- 97/23/EC
- M/071
- M/BC/CEN/89/2
- CEN/TC 121
Classification of imperfections in metallic fusion welds, with explanations (ISO 6520:1982)
Einteilung und Erklärung für Unregelmäßigkeiten beim Schmelzschweißen (ISO 6520:1982)
Classification des défauts dans les soudures par fusion des métaux, avec commentaires explicatifs (ISO 6520:1982)
Klasifikacija in razlaga napak pri talilnem varjenju kovin (ISO 6520:1982)
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This document specifies quality levels of imperfections in fusion-welded joints (except for beam welding) in all types of steel, nickel, titanium and their alloys. It applies to material thickness ≥ 0,5 mm. It covers fully penetrated butt welds and all fillet welds. Its principles can also be applied to partial-penetration butt welds.
Quality levels for beam-welded joints in steel are presented in ISO 13919-1.
Three quality levels are given in order to permit application to a wide range of welded fabrication. They are designated by symbols B, C and D. Quality level B corresponds to the highest requirement on the finished weld.
Several types of loads are considered, e.g. static load, thermal load, corrosion load, pressure load. Additional guidance on fatigue loads is given in Annex B.
The quality levels refer to production and good workmanship.
This document is applicable to:
a) non-alloy and alloy steels;
b) nickel and nickel alloys;
c) titanium and titanium alloys;
d) manual, mechanized and automatic welding;
e) all welding positions;
f) all types of welds, e.g. butt welds, fillet welds and branch connections;
g) the following welding processes and their sub-processes, as defined in ISO 4063:
— 11 metal arc welding without gas protection;
— 12 submerged arc welding;
— 13 gas-shielded metal arc welding;
— 14 gas-shielded arc welding with non-consumable tungsten electrode;
— 15 plasma arc welding;
— 31 oxyfuel gas welding (for steel only).
Metallurgical aspects, such as grain size and hardness, are not covered by this document.
- Standard34 pagesEnglish languagesale 10% offe-Library read for×1 day
- Standard34 pagesEnglish languagesale 10% offe-Library read for×1 day
- Draft31 pagesEnglish languagesale 10% offe-Library read for×1 day
- 14-Mar-2023
- 25.160.40
- CEN/TC 121
This document specifies a method for making transverse root, face and side bend tests on test specimens taken from butt welds, butt welds with cladding (subdivided into welds in clad plates and clad welds) and cladding without butt welds, in order to reveal imperfections on or near the surface of the test specimen which is under tension during bend testing and/or assess ductility. It also gives the dimensions of the test specimen.
In addition, this document specifies methods to be used instead of transverse bend tests with a former for welded joints when base materials, heat affected zones and/or weld metal have a significant difference in their physical and mechanical properties in relation to bending.
This document applies to metallic materials in all forms of product with welded joints made by any welding process.
- Standard31 pagesEnglish languagesale 10% offe-Library read for×1 day
- Draft23 pagesEnglish languagesale 10% offe-Library read for×1 day
- 24-Jan-2023
- 25.160.40
- CEN/TC 121
This document specifies acceptance levels for the phased array ultrasonic testing technique (UT-PA) of full-penetration welds in low-alloy and/or fine-grained steels in the wall thickness range from 3,2 mm to 8 mm which correspond to the quality levels of ISO 5817.
These acceptance levels are applicable to indications detected according to ISO 20601.
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- 20-Dec-2022
- 25.160.40
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This document specifies the procedures and recommended tooling to be used for peel and chisel testing of resistance spot and embossed projection welds. This document applies to welds made in two or more sheets in the thickness range of 0,5 mm to 3,0 mm.
The aim of these tests is to determine:
— weld size and failure mode when welds are destructively tested;
— verification of welds by non-destructive chisel tests.
NOTE The preferred method of peel testing seam welds (mechanized peel testing) is covered in ISO 14270.
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- Draft12 pagesEnglish languagesale 10% offe-Library read for×1 day
- 06-Dec-2022
- 25.160.40
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This document specifies techniques of digital radiography with the object of enabling satisfactory and repeatable results. The techniques are based on generally recognized practice and fundamental theory of the subject.
This document applies to the digital radiographic testing of fusion welded joints in metallic materials. It applies to the joints of plates and pipes. Besides its conventional meaning, “pipe”, as used in this document, covers other cylindrical bodies such as tubes, penstocks, boiler drums and pressure vessels.
This document specifies the requirements for digital radiographic X- and gamma-ray testing by either computed radiography (CR) or radiography with digital detector arrays (DDAs) of the welded joints of metallic plates and tubes for the detection of imperfections. It includes manual and automated inspection with DDAs.
Digital detectors provide a digital grey value image which can be viewed and evaluated using a computer (Annex E). This document specifies the recommended procedure for detector selection and radiographic practice. Selection of computer, software, monitor, printer and viewing conditions are important, but are not the main focus of this document. The procedure specified in this document provides the minimum requirements for radiographic practice which permits exposure and acquisition of digital radiographs with equivalent sensitivity for the detection of imperfections as film radiography (specified in ISO 17636-1).
This document does not specify acceptance levels for any of the indications found on the digital radiographs. ISO 10675 provides information on acceptance levels for weld inspection.
If contracting parties apply lower test criteria, it is possible that the quality achieved will be significantly lower than when this document is strictly applied.
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- 04-Oct-2022
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This document specifies the sizes of test specimen and the procedure for carrying out transverse tensile tests in order to determine the tensile strength and the location of fracture of a welded butt joint.
This document applies to metallic materials in all forms of product with joints made by any welded butt joint.
- Standard17 pagesEnglish languagesale 10% offe-Library read for×1 day
- Draft14 pagesEnglish languagesale 10% offe-Library read for×1 day
- 29-Sep-2022
- 30-Dec-2022
- 25.160.40
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This document specifies techniques of radiographic testing of fusion-welded joints in metallic materials using industrial radiographic film techniques with the object of enabling satisfactory and repeatable results. The techniques are based on generally recognized practice and fundamental theory of the subject.
It applies to the joints of plates and pipes in metallic materials. Besides its conventional meaning, “pipe” as used in this document covers other cylindrical bodies, such as tubes, penstocks, boiler drums and pressure vessels.
This document does not specify acceptance levels for any of the indications found on the radiographs. The ISO 10675 series provides information on acceptance levels for weld evaluation.
If contracting parties apply lower test criteria, it is possible that the quality achieved will be significantly lower than when this document is strictly applied.
- Standard45 pagesEnglish languagesale 10% offe-Library read for×1 day
- Draft43 pagesEnglish languagesale 10% offe-Library read for×1 day
- 02-Aug-2022
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This document specifies the method to be used when describing test specimen location and notch orientation for the testing and reporting of impact tests on welded butt joints.
This document applies to impact tests on metallic materials in all forms of product made by any fusion and pressure welding process.
It is used in addition to the ISO 148 series and includes test specimen denomination and additional reporting requirements.
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- Draft11 pagesEnglish languagesale 10% offe-Library read for×1 day
- 30-Jul-2022
- 30-Oct-2022
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This document gives recommendations for specimen preparation, test procedures and their main objectives for macroscopic and microscopic examination.
- Standard16 pagesEnglish languagesale 10% offe-Library read for×1 day
- Draft12 pagesEnglish languagesale 10% offe-Library read for×1 day
- 30-May-2022
- 30-Aug-2022
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- CEN/TC 121
This document specifies acceptance levels for indications from imperfections in butt welds of steel, nickel, titanium and their alloys detected by radiographic testing. If agreed, the acceptance levels can be applied to other types of welds (such as fillet welds, etc.) or materials.
The acceptance levels can be related to welding standards, application standards, specifications or codes. This document assumes that the radiographic testing has been carried out in accordance with ISO 17636‑1 for RT-F (F = film) or ISO 17636‑2 for RT-S (S = radioscopy) and RT-D (D = digital detectors).
- Standard21 pagesEnglish languagesale 10% offe-Library read for×1 day
- Draft16 pagesEnglish languagesale 10% offe-Library read for×1 day
- 30-Mar-2022
- 29-Jun-2022
- 25.160.40
- CEN/TC 121
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