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Standards Development
This European Standard specifies detailed functional requirements for the design, selection of
materials, construction, inspection and testing of:
- industrial gas installation pipework and assemblies with an operating pressure greater
than 0,5 bar; and
- non-industrial gas installation pipework (residential and commercial) with an operating
pressure greater than 5 bar in buildings;
starting from the outlet of the network operator’s point of delivery up to the inlet connection to the
gas appliance; normally the inlet isolation valve. This standard also covers the pipework to the
inlet connection of a gas appliance that is not included within the scope of the appliance
standard.
NOTE 1 The use of the term installation and pipework is interchangeable.
Apart from the exceptions stated below, this standard applies to gas installations operating at
ambient temperatures between −20 °C and 40 °C and operating pressures up to and including
60 bar. For operating conditions outside these limitations, reference should additionally be made
to EN 13480 (all parts) for metallic pipework.
For industrial gas installations up to and including 0,5 bar and for non-industrial (residential and
commercial) gas installations up to and including 5 bar in buildings, EN 1775 applies.
For gas installations that do not fall within the scope of EN 1775 or other European Standards,
this standard applies.
In this European Standard, the term “gas“ refers to combustible gases, which are gaseous at 15
°C and 1 013 mbar absolute atmospheric pressure (normal conditions). These gases are
commonly referred to as manufactured gas, natural gas or Liquefied Petroleum Gas (LPG). They
are also referred to as first, second or third family gases as classified in EN 437:2003+A1:2009,
Table 1. The given values are considered as normal conditions for all volumes given in this
standard.
This European Standard is applicable to installation pipework for the carriage of:
- processed, non-toxic and non-corrosive natural gas according to EN 437:2003+A1:2009
and EN 16726 "Gas infrastructure - Quality of gas - Group H";
- vaporized LPG;
- biomethane, complying with EN 16723 1;
- vaporized LNG.
NOTE 2 The specification of vaporized LNG is equal to that of natural gas as classified in
EN 437:2003+A1:2009.
This European Standard does not cover pipework for hydrogen rich gases that fall outside the
definitions within EN 437:2003+A1:2009.
LPG storage vessels (including all ancillaries fitted directly to storage vessels) are excluded.
Also excluded are LPG installations and sections of LPG installations operating at vapour
pressure in the liquid state (e.g. between the storage vessel and any pressure regulator).
In this standard, all pressures are gauge pressures unless otherwise stated.
This standard has been harmonized to address the essential safety requirements of the
Pressure Equipment Directive (PED, 2014/68/EU [formerly 97/23/EC]) relevant for the joining of
gas installation pipework (assemblies) falling within the scope of the PED. These are listed in
Annex ZA. However, "this Directive does not cover the assembly of pressure equipment on the
site and under the responsibility of the user, as in the case of industrial installations" (PED,
Preamble, 7th recital, last paragraph).
Addition of unplastizised polyamide (PA-U) to EN 15001-1, to reflect the state of the art.
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