Comments on A.S.A. Z21.1.1 - 1956 and Z21.1.1a - 1957. Approval Requirements for Domestic Gas Ranges, Vol. I Free Standing Units; and A.S.A. Z21.1.2 - 1956 and Z21.1. 2a - 1957, Vol. II Built-In Domestic Cooking Units

Publisher’s version / Version de l'éditeur:

Technical Note (National Research Council of Canada. Division of Building Research), 1957-12-01

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Comments on A.S.A. Z21.1.1 - 1956 and Z21.1.1a - 1957. Approval Requirements for Domestic Gas Ranges, Vol. I Free Standing Units; and A.S.A. Z21.1.2 - 1956 and Z21.1. 2a - 1957, Vol. II Built-In Domestic Cooking Units

Kent, A. D.; Hutcheon, N. B.

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https://nrc-publications.canada.ca/eng/view/object/?id=25e5ed33-b42e-42eb-a619-8eedb03bb352 https://publications-cnrc.canada.ca/fra/voir/objet/?id=25e5ed33-b42e-42eb-a619-8eedb03bb352

NATIONAL RESEARCH COUNCIL OF CANADA

No.

IV ([)']['

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NOT FOR PUBLICATION FOR INTERNAL USE

PREPARED BY A.D. Kent CHECKED BY APPROVED BY NBR

N.B. Hutoheon

PREPAREP FOR O.S.A. Oommittee on Gas Burning D6TE Deoember, 1957

Applianoes and Equipment

SUBJECT Oomments on A.S.A. Z21.1.l - 1956. and

Z2l.1.la - 1957. Approval ReqUirements for Domestio Gas Ranges, Vol. I Free ;Standing Units: and A.S.A. Z2l.1.2 - 1956 and

Z2l.1.2a - 1957, Vol. II Built-in Domestio Oooking Un1ts •

ｾ･ above A.S.A. speoifioations have been reviewed as a basis for the preparation of oorresponding OSA speoifioations. All referenoes to Amerioan Standards are listed below, with information on existing Oanadian Standards where these exist. Referenoe is made also to items whioh are potentially in oonfliot with existing Oanadian oodes suoh as the National Building Oode, 1953. All speoified temperatures (other than oven baking tempera-'tnres) are listed as a oonvenienoe in further oonsideration of these

speoifioations.

A.S.A. Z2l.l.l - 1956 and Z2l.1.1a - 1957 Standards

Eleotrioal eqUipment, wiring, motors

Page Paragraph

Page Paragraph Amerioan Standard Oanadian Standard

2 1.2.10 A.S.A. Bl.l - 1949 e.S.A. B1.l - 1949

2 1.2.11 A.S.A. B18.2 - 1952) _{e.S.A.. B33.l - 1950}

1 (Addenda) 1.5.15 A.S.A. B18.6 - 1947)

6 1.4.1 A.S.A. B36.10 - 1950 (O.S.A. B62 - 1949_{(e.S.A. B63 - 1949}

2 (Addenda) 1.10.7 A.I.S.I. 416 No O.S.A. Probably

use A.I.S.I.

Instead of A.S.A. 01 - 1956 use O.S.A. C22.1 - 1953 (this should be oheoked with ｅｬ･ｯｴｲｩｯｾｬ

Code Committee) .

1 (Addenda) 1.1.2) 2-5(Addenda) 1.22 )

2

-American Standard Listing and Installation Requirements

Page Paragraph' 7 1.5.1) 31 2.9.1) 32 2.9.2) 11 1.11.1) 30 2.8.1 ) 31 2.8.6 ) 13 1.16.2) 39 2.20.1) 14 1.20 14 1.21.1) 32 2.10 ) 18 1.23.2) 34 2.13 ) 18 1.24.1 Code Number Z2l.l5 - 1954 Z2l.20 - 1951 Z2l.23 - 1940 Z21.12 - 1937 Z21.21 - 1952 Z2l.l8 - 1955 Z2l.35' - 1945 Title Gas valves Automatic pilots Gas

｡ｰｐｬｩｾ

Automatic valves for gas appliances

Domestic gas appliance pressure regulators Gum protective devices ihese references will presumably be changed to the

corresponding e.S.A. Standards when 'they are completed. Miscellaneous

1. Sheet metal gauges

In the above standard sheet metal thicknesses are given in gauges. There is no Canadian Standard on sheet metal gauges, al-though 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 withA.S.A. B36.10 - 1950 (C.S.A. B62 - 1949 and B63 - 1949)

Pipe threads are presumably in accordance with A.S.A. B2.1 -1945 (no C.S.A. Standard)

3. Test gases

Are Canadian test gases the same? 4. Dafin!tions

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 -5. Temperatures Pa&e Paragraph 7 9 18 33 38 39 1.4.13) 1.7.3 ) 1.23.3 2.12 2.19 2.21

Minimum melting point of materials 14500_F,

950°F and 10000_F

Maximum temperature on pressure regulator 150°F

Maximum adjacent wall temperature 120°F above room temperature, i.e. 190°F (N.B.C. requires maximum of 160°F in all combustible surfaces) Maximum surface and handle temperatures

(table) 40° to 125°F above room temperature Maximum top panel surface temperature

700 _{'above room temperature (i.e. 140°F)}

Page Paragraph 1 (Addenda) 1.1.3) 2-5(Addenda) 1.22 )

A.S.A. Z21.1.2 - 1956 and Z21.1.2a - 1957 Standards

Page Paragraph American Standard Canadian Standard 3 1.2.16 A.S.A. B1.1 - 1949 C.S.A. B1.1 - 1949 3 1.2.17 A.S.A. ｂＱＸｾＲ - 1952) _{C.S.A. B33.1 - 1950} 2 (Addenda) 1.5.15 A.S.A. B18.6 - 1947)

4 1.4.. 1 A.S.A.. B36.10 - 1950 (C.S.A. B62 - 1949_{(C.S.A. B63 - 1949} 2 (Addenda) 1.10.7 A.I.S.I. 416 No C.S.A. Probably

use A.I.S.I. Electrical Equipment

instead of A.S.A. C1 1956 use C.S.A. C22.1 -1953 (this should be checked with Electrical Code Committee)

American Standard Listing and Installation Requirements Page 4 31 31 Paragraph 1.5.1) 2.9.1) 2.9.2) Code Number Z21.15 - 1954 Title Gas valves

ｾＮＧ ; Page Paragraph 9 1.11.1) 30 2.8.1 ) 31 2.8.5 ) 11 1.16.2) 39 2.21.1) 12 1.20 12 1.21.1) 32 2.10 ) 15 1.23.1) 34 2.14 ) 15 1.24.1

4

Gas appliance thermostats Draft hoods

Automatic valves for gas appliances

Domestic gas appliance pressure regulators Gum protective devices These references will presumably be changed to the corres-ponding C.S.A. Standards when they are completed.

Miscellaneous 1. 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. ｾ･ 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 (C.S.A. B62 - ＱＹｾＹ and B63 - 1949)

Pipe threads are presumably in accordance with A.S.A. B2.l -1945 (no C.S.A. Standard)

3. Test gases

Are Canadian test ;gases the same? 4. 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. 5 • Temperatures Paragraph 1.4.13) 1.7.3 ) ｍｩｾｭｵｭ ｭ･ｬｴｩｮｾ point of materials l450oF, 950 F and 1000 F

,

..

5

Maximum temperature on pressure regulator 150°F

Maximum temperature of burner valve body 230°F above room temperature (i.e. 300°F) Maximum temperature of exposed wall or

counter surface 120°F above room tempera-ture (i.e. 190°F) \

Maximum temperature of) concealed wall or enclosure surface 90°F above room tempera-ture (i.e. 160°F)

(N.B.C. requires maximum of 160°F on all combustible surfaces)

Maximum average flue gas temperature

480°F above room temperature (i.e. 550°F) Maximum surface and handle temperatures 40° to 125°F above room temperature Maximum top panel surface temperature 70°F above room temperature (i.e. 140°F) A.S.A. Z2l.l.1 - 1956 and Z2l.l.la - 1957

A.S.A. Z21.l.2 - 1956 and Z2l.l.2a - 1957 Agreement with National Building

Code, 1953

There appears to be general agreement between the above two works and the National Building Code.

The N.B.C. does not detail metal composition, sheet thicknesses and temperatures as do the American Standards.

The N.B.C. restricts all surface temperatures of combus-tible materials to 1600F maximum, whereas these standards allow higher surface temperatures on walls adjacent to cooking units.