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Operating Temp (°F) |
De-Rating Factor |
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The working pressure ratings (W.P.) given are for water, non-shock, @ 73°F. The following temperature de-rating factors are to be applied to the working pressure ratings (W.P.) listed when operating at elevated temperatures.
Multiply the working pressure rating of the selected pipe at 73°F by the appropriate de-rating factor to determine the maximum working pressure rating of the pipe at the elevated temperature chosen.
EX: 6" PVC SCH 120 @ 130°F = ?
370 psi x 0.31 = 115 psi max. @ 130°F
THE MAXIMUM SERVICE TEMPERATURE FOR PVC IS 140°F.
Solvent cemented joints should be utilized when working at or near maximum temperatures. Harvel Plastics does not recommend the use of PVC for threaded connections at temperatures above 110°F; use flanged joints, unions, or roll grooved couplings where disassembly is necessary at elevated temperatures.
Threading requires a 50% reduction in pressure rating stated for plain end pipe @73°F.
Chemical resistance data should be referenced for proper material selection and possible de-rating when working with fluids other than water. Refer to Harvel Plastics 112/401 Product Bulletin for chemical resistance and installation data.
Reference Harvel Plastics, Inc Product Bulletin 112/401 for information pertaining to chemical resistance, physical properties, joining methods, hangers and supports, collapse pressure ratings, system components and other system design and installation related data. | |
