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CSA/AM - ANSI Z21.22

Relief valves for hot water supply systems

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Organization: CSA/AM
Publication Date: 1 January 2015
Status: inactive
Page Count: 46
scope:

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.

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.

A vacuum relief valve is a single-purpose type.

All references to psi throughout this Standard are to be considered gage pressures unless otherwise specified.

Clause 9 contains provisions that are unique to Canada.

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.

Document History

January 1, 2015
Relief valves for hot water supply systems
A description is not available for this item.
ANSI Z21.22
January 1, 2015
Relief valves for hot water supply systems
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...
Relief Valves for Hot Water Supply Systems
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...
Relief Valves for Hot Water Supply Systems
PREFACE The standards set forth herein apply to the first edition of the Standard for Relief Valves for Hot Water Supply Systems, ANSI Z21.22-1999 · CSA 4.4-M99, and Addenda ANSI Z21.22a-2000 · CSA...
January 1, 2001
Relief Valves For Hot Water Supply Systems
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...
Relief Valves for Hot Water Supply Systems
PREFACE The standard set forth herein apply to the first edition of the Standard for Relief Valves for Hot Water Supply Systems, ANSI 221.22-1 999 . CSA 4.4-M99, and supersede corresponding...
RELIEF VALVES FOR HOT WATER SUPPLY SYSTEMS
The standard set forth herein apply to the first edition of the Standard for Relief Valves for Hot Water Supply Systems, ANSI Z21.22-1999 · CSA 4.4-M99, and supersede corresponding standards therein....
January 1, 2000
RELIEF VALVES FOR HOT WATER SUPPLY SYSTEMS
PREFACE The standard set forth herein apply to the first edition of the Standard for Relief Valves for Hot Water Supply Systems, ANSI Z21.22-1999 · CSA 4.4-M99, and supersede corresponding standards...
April 1, 1999
Relief Valves for Hot Water Supply Systems
PREFACE This publication represents a basic standard for safe operation, substantial and durable construction, and acceptable performance of relief valves for hot water supply systems. It is the...
April 1, 1999
Relief Valves for Hot Water Supply Systems
This standard applies to the following types of relief valves constructed entirely of new, unused parts and materials: a. Temperature relief valves and combination temperature and pressure relief...
Relief Valves for Hot Water Supply Systems
This standard applies to the following types of relief valves constructed entirely of new, unused parts and materials: a. Temperature relief valves and combination temperature and pressure relief...
January 1, 1999
RELIEF VALVES FOR HOT WATER SUPPLY SYSTEMS
PREFACE This publication represents a basic standard for safe operation, substantial and durable construction, and acceptable performance of relief valves for hot water supply systems. It is the...
January 1, 1990
Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems
A description is not available for this item.
January 1, 1986
Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems Sixth Edition
PREFACE This publication represents a basic standard for safe operation, substantial and durable construction, and acceptable performance of gas-fired gravity and fan type floor furnaces. It is the...
January 1, 1984
RELIEF VALVES AND AUTOMATIC GAS SHUTOFF DEVICES FOR HOT WATER SUPPLY SYSTEMS
PREFACE The standards set forth herein apply to the fifth edition of the Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22-1979, and Addenda,...
January 1, 1983
RELIEF VALVES AND AUTOMATIC GAS SHUTOFF DEVICES FOR HOT WATER SUPPLY SYSTEMS
PREFACE The standards set forth herein apply to the fifth edition of the Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22-1979, and superesede...
January 1, 1979
RELIEF VALVES AND AUTOMATIC GAS SHUTOFF DEVICES FOR HOT WATER SUPPLY SYSTEMS FIFTH EDITION; ADDENDA Z21.22A - 1983, ADDENDA Z21.22B - 1984
PREFACE This publication represents a basic standard for safe operation, substantial and durable construction, and acceptable performance for relief valves and automatic gas shutoff devices for hot...

References

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