Page 233 - Facility Piping Systems Handbook for Industrial, Commercial, and Healthcare Facilities
P. 233
HEAT TRANSFER, INSULATION, AND FREEZE PROTECTION
ST 113 118 117 118 106 112 119 117 113 119 112 114 114 117 118
SF 52 61 58 59 40 48 59 55 49 58 46 48 48 51 52
550 HL
LF 55 64 69 77 70 84 102 110 112 131 131 150 177 215 248
TH 1.5 1.5 1.5 1.5 2.0 2.0 1.5 2.0 2.0 2.0 2.5 2.5 2.5 2.5 2.5
ST 118 107 120 107 110 111 107 115 111 117 120 110 112 112 113
SF 64 43 66 42 47 48 41 53 46 56 59 44 45 45 46
450 HL
LF 48 45 60 55 62 70 72 93 93 112 134 124 153 179 207
TH 1.0 1.5 1.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2.0 2.0 2.0 2.0
Service temperature ST SF 104 40 120 68 105 40 112 51 109 46 110 47 97 26 114 52 107 41 114 52 117 55 119 57 118 55 106 37 118 54
HL
350
LF TH 30 1.0 42 0.5 37 1.0 47 1.0 48 1.0 56 1.0 45 1.5 76 1.0 71 1.0 90 1.0 110 1.0 130 1.0 157 1.0 136 2.5 212 1.0
Insulation Thickness for Personnel Protection 120° Maximum Surface Temperature, 80° Ambient 250 HL † ST ¶ SF § LF ‡ 109 521 25 104 41 25 112 55 34 109 49 37 117 61 46 114 55 50 115 56 59 120 64 75 96 25 43 119 61 89 102 33 67 103 35 79 103 33 95 105 36 521 103 32 129 § SF = Heat loss per s
TABLE 5.4 Nom. pipe TH * size, in 0.5 0.50 0.5 0.75 0.5 1.00 0.5 1.25 0.5 1.50 0.5 2.00 0.5 2.50 0.5 3.00 1.0 3.50 0.5 4.00 1.0 5.00 1.0 6.00 1.0 8.00 1.0 10.00 1.0 12.00 * TH = Thickness of insulation, inches. † HL = Heat loss, Btu/h. ‡ LF = Heat loss per lineal foot of pipe, Btu/h. ¶ ST = Surface temperature of insulation, °F.
5.17
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