Comments on A.S.A. Z21.39 - NRC Publications Archive
Transcription
Comments on A.S.A. Z21.39 - NRC Publications Archive
NRC Publications Archive Archives des publications du CNRC Comments on A.S.A. Z21.39 - 1957 Listing Requirements for Gas Conversion Burners for Domestic Ranges Kent, A. D.; Hutcheon, N. B. For the publisher’s version, please access the DOI link below./ Pour consulter la version de l’éditeur, utilisez le lien DOI ci-dessous. http://dx.doi.org/10.4224/20358993 NRC Publications Record / Notice d'Archives des publications de CNRC: http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=20358993&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=20358993&lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE. L’accès à ce site Web et l’utilisation de son contenu sont assujettis aux conditions présentées dans le site http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D’UTILISER CE SITE WEB. Contact us / Contactez nous: [email protected]. NATIONAL RESEARCH COUNCIL OF CANADA DIVISION OF BUILDING 'fE C 1HIN II CAlL NOT FOR 242 NOTlE FOR PUBLICATION A. Do Kent and CHECKED BY NoBo Hutcheon FOR CSA Committee on Gas Burning Appliances and Equipment PREPARED BY PREPARED SUBJECT No. RESEARCH INTERNAL APPROVED USE BY NBH DATE January 1958 Comments on A.SoAo Z21.39 - 1957 Listing Requirements for Gas Conversion Burners for Domestic Ranges The above ASA specification has been reviewed as a basis for the preparation of a corresponding CSA specification. All references to American Standards are listed below, with information on existing Canadian standards where these exist. Reference is made also to items which are potentially in conflict with existing Canadian Codes such as the National Building Code, 1953. All specified temperatures are listed as a convenience in further consideration of this specification. Standards Paragraph 1 2 1.2.1 1.2.2 1.3.2) 4 3 1.6.2a 1 1.8.1) American Standard A.S.A. Bl.l - 1949 AoS.Ao B18.62 - 1956 A.S.A. B36.10 - 1950 AoI.S.I. 416 Canadian Standard C.S.A. Bl.l - 1949 C.S.A. B33.1 - 1950 (C.S.A. B62 - 1949 (C.S.A. B63 - 1949 No C.S.A. Probably use· A.I.S.I. American Standard Listing and Installation ReqUirements Page Paragraph Code Number 3 10 1.6.3a) 20801 ) Z21.20 - 1951 Automatic Pilots 4 11 1.7.1) 2 09 ) Z21015 - 1954 Gas valves 109.1 Z21.35 - 1945 Gum protective devices 101002) 2010 ) Z21018 - 1956 Domestic gas appliance pressure regulators 4 5 11 Title ; - 2 - Page Paragraph Code Number 5 1.11 Z21.21 - 1952 6 2.1.2 Z21.38 - 1957 Title Automatic valves for gas appliances Installation of gas conversion burners in aomestic ranges These references will presumably be changed to the corresponding C.S.A. Standards when they are completed. Miscellaneous I. Sheet metal gauges In the above standard sheet metal thicknesses are given in gauges. There is no Canadian standard on sheet metal gauges, although at present C.G.S.B. is working on gauging. The National Building Code 1953 refers to U.S. standard gauge. 2. Pipe sizes Nominal pipe sizes are presumably in accordance with A.S.A. B36.10 - 1950. Use C.S.A. B62 - 1949 and B63 - 1949. Pipe threads are presumably in accordance with A.S.A. B2.l - 1945 (no C.S.A. standard). 3. Wire screen Page Paragraph No. 40 mesh brass, aluminum or eqUivalent 5 This is equivalent to 420 microns mesh as specified in C.G.S.B. 8-GP-la. 4. Test gases Are Canadian test gases the same? 5. Definitions Draft hood - differs from N.B.C. Flue - differs from N.B.C. Heating value (total) - higher calorific value. Others refer to lower calorific value. ,., , - 3 - 6. Temperatures Page Paragraph 2 2 3 4 5 1.,301 ) 1.502 ) 1.6,,2c) 1.802 ) 101203) Minimum melting point of materials 1450 0 F and lOOOoF 4 1.805 Maximum temperature on aluminum tubing 700°F Agreement with National Building Code, 1953 There appears to be general agreement between the above tvlO v'JOrks. The NoB. Co does not detail metal composition, sheet thiclD16sses and temperatures as does the American Standard. The NoB.Co item 6.2.308 05 may Note, for example, shut-off upon drop requirements for controls for gas firing, be stricter than in the American Standard. the last paragraph of this section requiring in pressure with liquefied petroleum gases.