3.8 PIPE INSULATION SCHEDULE Provide insulation for piping systems as scheduled below: SPEC WRITER NOTE: Insulate vent piping for PRV safety valves, receivers and flash tanks where protection to personnel is required. Insulation Thickness Millimeters (Inches) Nominal Pipe Size Millimeters (Inches) Operating Insulation Less 25 – 32 38 – 75 100 (4) Temperature Material than (1 – 1¼) and Above (1½ - 3) Range/Service 25 (1) 122-177 degrees C Mineral Fiber 75 (3) 100 (4) 113 (4.5) 113 (4.5) (251-350 degrees F) (Above ground piping only) (HPS, MPS) 93-260 degrees C Calcium 100 (4) 125 (5) 150 (6) 150 (6) (200-500 degrees F) Silicate (HPS, HPR) 100-121 degrees C Mineral Fiber 62 62 (2.5) 75 (3.0) 75 (3.0) (212-250 degrees F) (Above ground (2.5) piping only) (HPR, MPR, LPS, vent piping from PRV Safety Valves, Condensate receivers and flash tanks) 100-121 degrees C Rigid Cellular 50 50 (2.0) 75 (3.0) 75 (3.0) (212-250 degrees F) Phenolic Foam (2.0) (HPR, MPR, LPS, vent piping from PRV Safety Valves, Condensate receivers and flash tanks) 38-94 degrees C Mineral Fiber 38 38 (1.5) 50 (2.0) 50 (2.0) (100-200 degrees F) (Above ground (1.5) piping only) (LPR, PC, HWH, HWHR, GH and GHR) 38-99 degrees C Rigid Cellular 38 38 (1.5) 50 (2.0) 50 (2.0) Phenolic Foam (1.5) (100-211 degrees F)
3.8 PIPE INSULATION SCHEDULE Provide insulation for piping systems as scheduled below: SPEC WRITER NOTE: Insulate vent piping for PRV safety valves, receivers and flash tanks where protection to personnel is required. Insulation Thickness Millimeters (Inches) Nominal Pipe Size Millimeters (Inches) Operating Temperature Range/Service Insulation Material Less than 25 (1) 25 – 32 (1 – 1¼) 38 – 75 (1½ - 3) 100 (4) and Above 122-177 degrees C (251-350 degrees F) (HPS, MPS) Mineral Fiber (Above ground piping only) 75 (3) 100 (4) 113 (4.5) 113 (4.5) 93-260 degrees C (200-500 degrees F) (HPS, HPR) Calcium Silicate 100 (4) 125 (5) 150 (6) 150 (6) 100-121 degrees C (212-250 degrees F) (HPR, MPR, LPS, vent piping from PRV Safety Valves, Condensate receivers and flash tanks) Mineral Fiber (Above ground piping only) 62 (2.5) 62 (2.5) 75 (3.0) 75 (3.0) 100-121 degrees C (212-250 degrees F) (HPR, MPR, LPS, vent piping from PRV Safety Valves, Condensate receivers and flash tanks) Rigid Cellular Phenolic Foam 50 (2.0) 50 (2.0) 75 (3.0) 75 (3.0) 38-94 degrees C (100-200 degrees F) (LPR, PC, HWH, HWHR, GH and GHR) Mineral Fiber (Above ground piping only) 38 (1.5) 38 (1.5) 50 (2.0) 50 (2.0) 38-99 degrees C (100-211 degrees F) Rigid Cellular Phenolic Foam 38 (1.5) 38 (1.5) 50 (2.0) 50 (2.0)
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