This is the third edition of CSA B137.18, Polyethylene of raised temperature resistance (PE-RT) tubing systems for pressure applications. It supersedes the previous editions published in 2017 and 2013.
While earlier editions of this Standard were published as part of the CSA B137 Series, Thermoplastic pressure piping compendium, the second edition was reissued as a stand-alone Standard in January 2019. The compendium format has been discontinued.
This Standard is to be used with the 2020 edition of CSA B137.0, which provides requirements and test methods that are common to some or all of the Standards of the CSA B137 series.
The major changes in this new edition are the following:
a) clarification of barrier layer in Clause 22.214.171.124.2;
b) revision to fitting requirements in Clauses 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.6, and 5.1.7;
c) revision to fitting qualification requirements in Clause 5.1.8;
d) revision to fitting marking requirements in Clause 7.2;
e) revision to packaging marking requirements in Clause 7.3; and
f) revision to flexible pre-insulated tubing marking requirements in Clause 7.4.
This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.
This Standard specifies requirements for polyethylene of raised temperature (PE-RT) tubing systems that comprise tubing and fittings.
Tubing covered by this Standard is made in Standard Dimensional Ratio 9 (SDR 9).
Systems are pressure rated at two temperatures: 1105 kPa at 23 °C and 690 kPa at 82 °C. Systems are intended for use in potable water distribution systems or other applications, including municipal water service lines, reclaimed water distribution, radiant panel heating and cooling systems, hydronic baseboard heating systems, snow and ice melting heating systems, building services piping, compressed air distribution, and ground source geothermal systems, provided that the PE-RT tubing systems covered in this Standard comply with the applicable code requirements. Residential and commercial systems are included.
Note: The requirements and test methods specified in this Standard can involve hazardous materials, operations, and equipment. This Standard does not purport to address all potential safety problems associated with its use. Before using this Standard, users are responsible for establishing appropriate health and safety practices and determining the applicability of any regulatory limitations.
This Standard specifies requirements for
b) quality of work;
d) metal components of mechanical fittings;
f) interior liners;
h) hydrostatic capability;
i) marking for tubing and fittings; and
j) marking for flexible pre-insulated tubing.
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.