Welding Fabrication Standards - EWF

Welding Fabrication Standards Page 53
The standard applies to metallic piping above ground, ducted or buried, irrespective of pressure,
and does not relate to:
− pipelines and their accessories;
− stream waterways such as penstocks, pressure tunnels, pressure shaft for hydro-electricinstallations
and their related specific accessories;
− permanently fixed piping for ships, rockets, aircraft and mobile offshore units;
− items specifically designed for nuclear use, failure of which may cause an emission of
radioactivity;
− well-control equipment used in the petroleum, gas or geothermal exploration and extraction
industry and in underground storage, which is intended to contain and/or control well pressure,
including the piping;
− piping of blast furnaces including the furnace cooling, hot blast recuperators, dust extractors
and blast furnace exhaust gas scrubbers and direct reducing cupolas including the furnace
cooling, gas converters and vacuum;
− furnaces and pans for melting, re-melting de-gassing and casting of steel and non ferrous
metals;
− enclosures for high voltage electrical equipment such as switchgear, control gear and
transformers;
− pressurised pipes for the containment of transmission systems such as for electrical power and
telephone cables;
− internal piping of boilers and piping integral to pressure vessels.
The standard is divided in six parts; part 1 is a general introduction of the standard, the other part
define specific requirements, a detail of which will be given in the next paragraphs.
5.2 EN 13480-2: Materials
This Part specifies the requirements for materials (including metallic clad materials) for industrial
piping and supports, not serviced in the creep range temperatures.
It specifies the requirements for the selection, inspection, testing and marking of metallic materials
for the fabrication of industrial piping.
All the materials shall have sufficient ductility, as specific values for elongation are provided (e.g.
14% in the transverse direction and 16% in the longitudinal direction).
Three different methods for the evaluation of the impact tests properties are provided, based on
the following different approaches:
− technical requirements are developed from operating experience and applicable to all metallic
materials, but limited to certain thicknesses for which experience exist;
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