BS EN ISO 5817:2014 Welding. Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded). Quality levels for imperfections
BS EN ISO 5817 provides 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.
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. The quality levels refer to production and good workmanship.
BS EN ISO 5817 applies 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 electrodes
— 15 plasma arc welding
— 31 oxy-fuel gas welding (for steel only).
Metallurgical aspects, e.g. grain size, hardness, are not covered by this international standard. This British Standard is the UK implementation of EN ISO 5817:2014. It replaces BS EN ISO 5817:2007 which is now withdrawn.
BS EN ISO 5817 is written by technical experts from:
The Welding Institute
The British Constructional Steel Association
The Safety Assessment Federation
Association of Industrial Laser Users
And many more
Contents of BS EN ISO 5817 include:
2 Normative references
3 Terms and definitions
5 Assessment of imperfections
Annex A (informative) Examples of determination of percentage (%) porosity
Annex B (informative) Additional information and guidelines for use of this
Annex C (informative) Additional requirements for welds in steel subject to fatigue