scope:

Except as indicated in Clause 1.2, Part 1 of this Standard applies to all boilers, pressure vessels, pressure piping, and fittings, as provided for by the Act (as defined in Clause 3) and identified in Part 1 of this Standard.

Notes:

1) In certain provinces there may be variations in the size limitations specified in Part 1 of this Standard. The regulatory authority should be consulted.

2) All pressures specified in Part 1 of this Standard are gauge pressures above atmospheric pressure.

Requirements for compressed natural gas cylinders and refuelling station pressure piping systems and containers are covered in Parts 2 and 3 of this Standard

This Standard does not apply to

a) pressure-retaining components in hydraulic elevators;

b) pressure-containment devices for gas-filled switchgear and controlgear; and

c) pressure vessels for the transportation of dangerous goods regulated by Transport Canada.

Where any clause of Part 1 of this Standard is at variance with the referenced codes and standards, the requirements of Part 1 of this Standard govern.

In CSA Standards, "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. Legends to equations and figures are considered requirements.

The values given in SI (metric) units are the standard. The values given in parentheses are for information only. Nominal pipe sizes are expressed in non-dimensional terms.