CSA ANSI Z21.75:2016 pdf download.Connectors for outdoor gas appliances  and manufactured homes.
1.1
CSA ANSI Z21.75 applies to newly produced assembled connectors constructed entirely of new, unused parts and materials. Such connectors are intended for exterior use above ground for making the
following non-rigid connections:
a) between the gas supply and the gas inlet of an appliance for outdoor installation that is not frequently moved after installation. These connectors are not intended for use with wheeled, caster mounted, or portable appliances;
b) between the permanent gas outlet of a manufactured home community (mobile home park) or individual site and the piping inlet on a park trailer or a manufactured (mobile) home; or
c) between sections of a multiple section manufactured (mobile) home.
1.2
Connectors covered by CSA ANSI Z21.75 are considered suitable for use with natural, manufactured, mixed, and propane gases and LP gas-air mixtures.
1.5
If a value for measurement as given in CSA ANSI Z21.75 is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.
1.6
All references to “psi” throughout CSA ANSI Z21.75 are to be considered gauge pressure unless otherwise specified.
1.7
Annex A contains provisions that are unique to Canada.
1.8
Clause 2 contains a list of standards specifically referenced in CSA ANSI Z21.75 and sources from which these reference standards may be obtained.
1.9
In CSA ANSI Z21.75, “shall” is used to express a requirement, i.e., a provision that the user shall 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.
2 Reference publications
CSA ANSI Z21.75 refers to the following publications, and where such reference is made, it is to the edition listed below:
3 Definitions
The following definitions shall apply in this Standard:
Adapter一as used in this Standard, a metal ftting designed to connect standard taper pipe threads to the connector nut.
Appliance一all gas utilization equipment.
Capacity – as used in this Standard, the amount of a specified gas that will flow through a connector at a specified pressure drop in a fixed period of time.
Conduit, gas一the structure enclosing the gas passageway of the connector.CSA ANSI Z21.75 pdf download.