Document reOXo0yJbLpaRK1vY7j0x9jnv

346 CHAPTER 18 1948 Guide are considered consistent with good practice, although there are boilers which have high efficiencies and also operate at higher transmission rates. TESTING AND RATING CODES The Society has adopted four solid fuel testing codes, a solid fuel rating code, and an oil fuel testing code. . ASHVE Standard and Short Form Heat Balance Codes for Testing Low-Pressure Steam Heating Solid Fuel Boilers--Codes 1 and 2-- (Revision of June, 1929) l, are intended to provide a method for con ducting and reporting tests to determine heat efficiency and performance characteristics. ASHVE Performance Test Code for Steam Heating Solid Fuel Boilers --Code No. 3--(Edition of 1929)1 is intended for use with ASHVE Code for Rating Steam Heating Solid Fuel Hand-Fired Boilers2. The object of this test code is to specify the tests to be conducted and to provide a method for conducting and reporting tests to determine the efficiencies and performance of the boiler. The ASHVE Standard Code for Testing Steam Heating Boilers Burn ing Oil Fuel5, (Adopted June, 1932), is intended to provide a standard method for conducting and reporting tests to determine the heating efficiency and performance characteristics when oil fuel is used with steam heating boilers. In 1938 the Society adopted a Standard Code for Testing Stoker-Fired Steam Heating Boilers4, (Adopted June, 1938), which is intended to provide a test method for determining the efficiency'and performance characteristics of any stoker and boiler combination burning any type of solid fuel such as anthracite or bituminous coal: . The Steel Boiler Institute, Inc. has adopted (June 12, 1945) a Rating Code for Commercial Steel Boilers and Residential Steel Boilers and for Testing Oil-Fired Residential Steel Boilers. The commercial boilers (defined as those having 129 to 2500 sq ft of heating surface) are rated in Table 1. SB/. Net Rating Data for Residential Steel Boilers--Oil Fireds Sq Ft Steam 275 320 400 550 700 900 1100 1300 1500 1800 2200 2600 3000 SBI Net Rating Sq Ft Water 440 510 . 640 ' 880 1120 1440 1760 2080 2400 2880 3520 4160 4800 h; Btu 66000 ;77000 96O0O 132000 168000 216000 264000 312000 360000 432000 528000 624000 720000 . Minimum _ . Furnace Volume Cu Ft Heating Surface Sq Ft ,' 2.5 " 2.9 3.6 5.0 6.4 . 8.2 10.0 ' 11.8' 13.6 16.4 . 20.0 23.6 27.3 16 19 24 32 41 . . 53 '65 77 ' 88 . 106 129 153 177 "Stoker-fired and Gas-fired SBl Net Rating not greater than Oil-fired. Hand-fired, SBI Net Rating (Steam) not greater than 14 times the square feet of heating surface. ' Heating Boilers and Furnaces T a b le 2. S B I Ratings for Commercial Steel Boilers ftBltuminous'Stoker Fired. 347