Logo

CSA ANSI Z21.22-2015 (R2020)/CSA 4.4-2015 (R2020)

Current Reaffirmation

Relief valves for hot water supply systems

$344.00


Sub Total (1 Item(s))

$ 0.00

Estimated Shipping

$ 0.00

Total (Pre-Tax)

$ 0.00


Stay effortlessly up-to-date with the latest standard revisions. When new versions are released, they're automatically charged and delivered to you, ensuring seamless compliance.

Document Preview Not Available...

Relief valves for hot water supply systems
Preface This is the second edition of ANSI Z21.22-2015 / CSA 4.4-2015, Relief valves for hot water supply systems.  Scope 1.1 This Standard applies to the following types of relief valves constructed entirely of new, unused parts and materials:  a) combination temperature and pressure relief valves for use on storage tanks of hot water supply systems without heater input limitation, hereinafter called "T&P" valves;  b) valves having only pressure relief features for use on storage tanks of hot water supply systems without heater input limitation; and  c) vacuum relief valves.  1.2 A T&P valve operates when the temperature sensing element is at 210 °F (99 °C) or less. A device with a higher operating temperature is not acceptable under this Standard.  1.3 A vacuum relief valve is a single-purpose type.  1.4 All references to psi throughout this Standard are to be considered gage pressures unless otherwise specified.  1.5 Clause 9 contains provisions that are unique to Canada.  1.6 In this Standard, "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.

SDO CSA: Canadian Standards Association
Document Number
Publication Date June 12, 2020
Language en - English
Page Count
Revision Level
Supercedes
Committee
Publish Date Document Id Type View
June 12, 2020 Reaffirmation