MIL-HDBK-1191
Process Gas. Process gas is natural or propane that is used
9.6.24
as a point-of-use heat or flame source. The process is typically found
in laboratories and sometimes in other areas such as equipment repair and
DTR's to support medical or dental functions. The gas system design shall
be in accordance with NFPA 54 and 58 (references 9o and 9p).
9.6.24.1 Load. The load is the sum of the consumption rates for the
given apparatus or equipment to be serviced. Laboratory burners are
typically sized at 1465 W (5,000 Btuh) for small burners and 3075 W
(10,500 Btuh) for large burners. For other equipment such as casting
ovens, use manufacturers data.
9.6.24.2
Demand is based upon the number of outlets shown in Table 9-19.
TABLE 9-19
PROCESS GAS UTILIZATION FACTORS
Percent Usage (%)
Number of Outlets
1-
8
100
9-
16
90
17 -
29
80
30 -
79
60
80 - 162
50
163 - 325
40
326 - 742
35
743 - 1570
30
1571 - 2900
25
>2900
20
REFERENCES
9a.
National Association of Plumbing-Heating-Cooling Contractors
(NAPHCC), "National Standard Plumbing Code."
9b.
International Code Council (ICC), "International Plumbing Code."
9c.
National Association of Corrosion Engineers (NACE), "Book of
Standards and Their Applicable Recommended Practices."
9d.
Center for Disease Control and Prevention, "Guideline for
Prevention of Nosocomial Pneumonia."
9e.
American Society of Heating, Refrigerating, and Air-Conditioning
Engineers, Inc, ASHRAE Guideline 12-2000, "Minimizing the Risk of
Legionellosis Associated with Building Water Systems."
9f.
American Society for Healthcare Engineering/Joint Commission on
Accreditation of Healthcare Organizations, "Waterborne Pathogens
Compliance with JCAHO Requirements."
9g.
American Society of Testing and Materials, ASTM D 1193, "Reagent
Water."
9h.
American Society of Heating, Refrigeration and Air-Conditioning
Engineers, ASHRAE Handbook, "HVAC Applications - Service Water
Heating."
9-34
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