CSA/AM - ANSI Z21.22-1986
Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems Sixth Edition
|Publication Date:||1 January 1986|
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 result of years of experience in the utilization of gas supplemented by extensive research.
Nothing in this standard is to be considered in any way as indicating a measure of quality beyond compliance with the provisions it contains. It is designed to allow compliance of relief valves and automatic gas shutoff devices, the construction and performance of which may exceed the various provisions specified in any respect. In its preparation, full recognition has been given to possibilities of improvement through ingenuity of design. As progress takes place, revisions may become necessary. When they are believed desirable, recommendations should be forwarded to the Chairman of Accredited Standards Committee 221,8501 East Pleasant Valley Road, Cleveland, Ohio 44131.