New Standard from Last Update.

1. SCOPE

1.1 This standard specifies the general requirements and the performance requirements for multilayer (PE-Al-PE) plastics piping systems based on pipes, fittings and their joints intended to be used for gas supply within buildings, ranging from 14 mm to 75 mm outside diameter. This standard applies to systems that operate at temperatures from - 20 °C up to + 60 °C. For the purpose of this standard, adhesive layers are considered as thermoplastic materials. This standard is applicable for piping systems used in buildings to supply gas with a maximum operating pressure of up to and including 500 kPa (5 bar). This standard is applicable for the conveyance of following fuels:

a) Non-toxic natural gas; and

b) Flammable and/or toxic fluids which are gaseous at ambient temperature and atmospheric pressure conditions and are conveyed as gases and/or liquids.

1.2 This standard also provides guidance for the design of piping systems consisting of multilayer pipes based on thermoplastics, for which at least 60 percent of the wall thickness shall be polymeric material. Polymeric materials intended for stress-designed layer (inner layer) shall be polyethylene (PE). The outer layershall also be polyethylene (PE), and the intermediate layer shall be aluminium.