This bundle contains a PDF copy of CSA B52:18, Mechanical refrigeration code and ANSI/ASHRAE Standard 34-2019, Designation and Safety Classification of Refrigerants
CSA B52:18, Mechanical refrigeration code
The twelfth edition of CSA B52, Mechanical refrigeration code provides the minimum requirements for the design, construction, installation, inspection, and maintenance of mechanical refrigeration systems, and is complemented by the practical implementation guidance B52 Handbook, helping to minimize the risk of personal injury. This Standard applies to all refrigeration systems installed, whether in new or existing premises, to systems that undergo a substitution of refrigerant, and to parts that are replaced in or added to the system.
The purpose of this Standard is to minimize the risk of personal injury by providing minimum requirements for the design, construction, installation, inspection, and maintenance of the mechanical refrigeration systems and volatile direct refrigeration systems specified in Clauses 1.2.1 and 1.2.2.
Note: This Standard does not directly address protection of property and preservation of the environment.
Except as specified in Clause 1.2.3, this Standard applies to the design, construction, installation, inspection, and maintenance of every refrigeration system as provided for by the “Act” (as defined in Clause 3) and identified in this Standard.
This Standard applies to
a) all refrigeration systems installed subsequent to its adoption. This includes refrigeration systems installed in a new or existing premises. It also applies to all premises, including the machinery room if required, in which a refrigeration system is to be installed;
b) refrigeration systems that undergo a substitution of refrigerant in a premises defined in Item a); and
c) those parts of a refrigeration system that are replaced in, or added to, systems installed prior to its adoption.
Note: When adding or replacing parts [see Item c)], consideration should be given to the premises requirements of Item a).
This Standard does not apply to the following:
a) the use of water or air as a refrigerant;
b) bulk-storage gas tanks not permanently connected to a refrigeration system;
c) refrigeration systems installed on railroad cars, motor vehicles, motor-drawn vehicles, aircraft, or ships; and
d) refrigeration systems used for air conditioning in private residences.
ANSI/ASHRAE Standard 34-2019, Designation and Safety Classification of Refrigerants
ASHRAE Standard 34 describes a shorthand way of naming refrigerants and assigns safety classifications and refrigerant concentration limits based on toxicity and flammability data.
The 2019 edition of the standard incorporates 24 approved and published addenda to the 2016 edition. Brief descriptions of the addenda and their dates of approval are included in Informative Appendix H.
This standard is intended to establish a simple means of referring to common refrigerants instead of using the chemical name, formula, or trade name. It establishes a uniform system for assigning reference numbers, safety classifications, and refrigerant concentration limits to refrigerants. The standard also identifies requirements to apply for designations and safety classifications for refrigerants and to determine refrigerant concentration limits.
This standard provides an unambiguous system for numbering refrigerants and assigning composition designating prefixes for refrigerants. Safety classifications based on toxicity and flammability data are included along with refrigerant concentration limits for the refrigerants. This standard does not imply endorsement or concurrence that individual refrigerant blends are suitable for any particular application.