1 Scope
This International Standard establishes general principles regarding the procedure
used in the construction and quality assessment of butt fusion joints incorporating
fittings (ISO 8085‑2) and pipes used in the construction of gas (ISO 4437) and water (ISO 4427) distribution systems made with equipment that complies with ISO 12176-1 and installed
in accordance with ISO/TS 10839, relevant codes of practice, national regulations
or industry guidance. Specifically, this International Standard specifies a number
of proven butt fusion jointing procedures for pipes and fittings with a wall thickness
up to and including 70 mm. This International Standard takes into consideration the
materials and components used, the fusion jointing procedure and equipment and the
quality assessment of the completed joint. It can be applied in conjunction with appropriate
national regulations and standards.
NOTE It is important that pipe or fitting manufacturers and equipment manufacturers be
consulted when undertaking butt fusion jointing of pipes with a wall thickness greater
than 70 mm.