Polypropylene (PP-R & PP-RCT) pipe and fittings for pressure applications

1.1 General

This Standard covers two types of polypropylene (PP) pipe and fittings – polypropylene random copolymer (PP-R) and polypropylene random copolymer with modified crystallinity and temperature resistance (PP-RCT) intended for use in pressure applications such as hot and cold potable water distribution systems, process piping, reclaimed/recycled water systems, water service, hydronic heating and cooling, and geothermal systems. Piping system components covered by this Standard are classified based on dimension ratio in sizes NPS-3/8 to NPS-28, and are joined using socket-type heat-fusion joints, saddle welding joints (fusion outlet), electrofusion joints, and butt fusion.

Piping covered by this Standard with minimum hydrostatic pressure ratings of 1105 kPa at 23 °C and 690 kPa at 82 °C are intended for use in plumbing applications. Pipes with different DRs can have higher or lower pressure ratings for other applications.

1.2 Requirements

This Standard specifies requirements for materials, dimensions, hydrostatic sustained pressure performance, longitudinal reversion, apparent tensile strength, oxidative resistance, and marking.

1.3 Terminology

In this Standard, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; should is used to express a recommendation or that which is advised but not required; and may is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.