Page 71 - HVAC Pump Handbook

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Piping System Friction
68 The Basic Tools

PVC VENDOR A PVC VENDOR B

SHORT RADIUS LONG RADIUS
FORGED STEEL FORGED STEEL
a. Comparison of PVC elbows with steel.

b. Shapes of plastic pipe reducers.
Figure 3.8 Cross-sections of steel and plastic fitting. (Copyright © 1999. American
Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. www.ashrae.org
Reprinted by permission from ASHRAE Transactions, Vol. 105, Part 1.)

manufacturers of this pipe. Most thermoplastic pipe as used on HVAC
water systems is manufactured in PVC (polyvinyl chloride), schedule
40 and 80 pipe, and CPVC (chlorinated polyvinyl chloride), schedule
80 pipe.
Thermoplastic pipe is manufactured in sizes up to 16 in, but
many common pipe fittings may not be readily available over 12-in

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