scope:

This Standard covers co‐extruded polyethylene/aluminium/crosslinked polyethylene (PE‐AL‐PEX) composite pipes comprising a welded aluminium (AL) tube laminated by a melt adhesive to an outside layer of polyethylene (PE) and an inside layer of crosslinked polyethylene (PEX) in nominal sizes 1216, 1620, 2025, 2532, 3240, 4050, 5063, 6375, 7590, and 90110 and specifies requirements for materials, physical characteristics, performance testing, and markings.

Note: The first two digits of the nominal size indicate the approximate inside diameter, in mm, and the following digits indicate the nominal outside diameter, also in mm. For example, a 2025 pipe means the inside diameter is approximately 20 mm and the outside diameter is approximately 25 mm.

PE‐AL‐PEX composite pipes covered by this Standard are intended for use in

(a) residential and commercial water supply systems;

(b) residential heating systems;

(c) compressed air systems; and

(d) transportation of chemicals.

Note: The pipe manufacturer should be contacted prior to use of PE‐AL‐PEX pipe for transportation of chemicals, to evaluate the compatibility of the inside PEX layer with the chemical(s) intended to be transported and the pressure rating of the pipe with respect to the chemical(s).

PE‐AL‐PEX composite pipes covered by this Standard are rated for

(a) 1,200 kPa at 23 ºC;

(b) 800 kPa at 80 ºC; and

(c) 500 kPa at 95 ºC.

This Standard does not cover

(a) PE‐AL‐PEX composite pipes consisting of metallic layers not welded together; and

(b) fittings and connectors.

Terminology

In this Standard,

(a) "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy to comply with the Standard;

(b) "should" is used to express a recommendation, but not a requirement;

(c) "may" is used to express an option or something permissible within the scope of the Standard; and

(d) "can" is used to express a possibility or a capability.

Notes accompanying sections of the Standard do not specify requirements or alternative requirements; their purpose is to separate explanatory or informative material from the text. Notes to tables and figures are considered part of the table or figure and can be written as requirements.

Units of Measurement

SI units are the primary units of record in India and in global commerce and are the units used in this Standard.

Amendments

Proposals for amendments to this Standard will be processed in accordance with the standardswriting procedures of IAPMO.

Patents

The user's attention is called to the possibility that compliance with this Standard might require use of an invention covered by patent rights. By publication of this Standard, no position is taken with respect to the validity of any such claim(s) or of any patent rights in connection therewith. If a patent holder has filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such a license, then details can be obtained from IAPMO.