ISO 15439-3:2007 specifies the physical and mechanical characteristics of fittings made from polyamide in accordance with ISO 15439-1, intended to be buried and used for the supply of gaseous fuels for maximum operating pressure up to and including 4 bar.
It also specifies the test parameters for the test methods to which it refers.
ISO 15439-3:2007 also lays down requirements for dimensions and the marking of fittings.
In conjunction with ISO 15439-1 and ISO 15439-2 it is applicable to PA fittings, their joints and to joints with components of PA.
These fittings can be of the following types:
- solvent cement socket fittings;
- solvent cement spigot fittings;
- solvent cement saddle fittings.