Polyamide (PA) piping systems for gas services

1.1 General

This Standard covers polyamide (PA) pipe, tubing, and fittings for use in gas mains and services, including the gathering, transmission, and distribution of gases that can contain aromatic hydrocarbons.

1.2 Fittings and connections

This Standard covers all types of fittings and connections used in PA piping systems for gas services, including plastic-to-metal transition fittings, plastic component fittings (e.g., elbows, tees, end caps, and valves), and clamps and couplings.

Notes:

1) In this Standard, pipe refers to pipe having NPS outside diameters and tubing refers to pipe having NTS outside diameters.

2) In this Standard, test requirements for pipe apply to both pipe and tubing.

1.3 Requirements

This Standard specifies the manufacturing and testing requirements necessary to ensure that the PA compound, pipe, and fittings are of a quality acceptable for use in gas distribution systems. This Standard specifies requirements for

a) primary properties of the compound;

b) physical properties of the finished product;

c) on-line monitoring during production;

d) shipping and storage; and

e) markings.

Note: The user of the pipe, tubing, or fittings should refer to CSA Z662 for design and installation limitations of products covered by this Standard.

1.4 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.