{"id":511335,"date":"2024-11-05T14:13:34","date_gmt":"2024-11-05T14:13:34","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ansi-z21-22-2015-r2020-csa-4-4-2015-r2020\/"},"modified":"2024-11-05T14:13:34","modified_gmt":"2024-11-05T14:13:34","slug":"ansi-z21-22-2015-r2020-csa-4-4-2015-r2020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/csa\/ansi-z21-22-2015-r2020-csa-4-4-2015-r2020\/","title":{"rendered":"ANSI Z21.22-2015 (R2020)\/CSA 4.4-2015 (R2020)"},"content":{"rendered":"

Preface<\/strong><\/p>\n

<\/p>\n

This is the second edition of ANSI Z21.22-2015 \/ CSA 4.4-2015, Relief valves for hot water supply systems. <\/em><\/p>\n

<\/p>\n

Scope<\/strong><\/p>\n

<\/p>\n

1.1<\/p>\n

This Standard applies to the following types of relief valves constructed entirely of new, unused parts and materials: <\/p>\n

<\/p>\n

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; <\/p>\n

<\/p>\n

b) valves having only pressure relief features for use on storage tanks of hot water supply systems without heater input limitation; and <\/p>\n

<\/p>\n

c) vacuum relief valves. <\/p>\n

<\/p>\n

1.2<\/p>\n

A T&P valve operates when the temperature sensing element is at 210 \u00b0F (99 \u00b0C) or less. A device with a higher operating temperature is not acceptable under this Standard. <\/p>\n

<\/p>\n

1.3<\/p>\n

A vacuum relief valve is a single-purpose type. <\/p>\n

<\/p>\n

1.4<\/p>\n

All references to psi throughout this Standard are to be considered gage pressures unless otherwise specified. <\/p>\n

<\/p>\n

1.5<\/p>\n

Clause 9 contains provisions that are unique to Canada. <\/p>\n

<\/p>\n

1.6<\/p>\n

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. <\/p>\n

<\/p>\n

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. <\/p>\n

<\/p>\n

Notes to tables and figures are considered part of the table or figure and may be written as requirements. <\/p>\n

<\/p>\n

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.<\/p>\n","protected":false},"excerpt":{"rendered":"

Relief valves for hot water supply systems (Including revision history of 2015)<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
CSA<\/b><\/a><\/td>\n2015<\/td>\n46<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":511348,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[22,2674],"product_tag":[],"class_list":{"0":"post-511335","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-22","7":"product_cat-csa","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/511335","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/511348"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=511335"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=511335"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=511335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}