Chlo­ri­nated polyvinyl chlo­ride (CPVC)


  • A ther­mo­plas­tic that shares most char­ac­ter­is­tics with PVC
  • Read­ily work­able for machin­ing, weld­ing and forming
  • Excel­lent cor­ro­sion resis­tance at high temperatures
  • Easy to bend, shape and weld
  • Fire-retardant

Com­mon uses

  • Hot and cold water pipe
  • Indus­trial liq­uid handling
  • Pumps, valves, strain­ers, fil­ters, tower pack­ing and duct
  • Sheet for fab­ri­ca­tion into stor­age tanks, fume scrub­bers, large-diameter duct and tank lining


Mate­r­ial Specifications

ASTM or UL test Prop­erty Value
D792 Den­sity (g/cm3) 1.56
D570 Water absorp­tion, 24 hrs (%) 0.04–0.4
D638 Ten­sile strength (psi) 8,200
D638 Ten­sile mod­u­lus (psi) 430,000
D638 Ten­sile elon­ga­tion at break (%) 20–40
D790 Flex­ural strength (psi) 15,000
D790 Flex­ural mod­u­lus (psi) 410,000
D785 Hard­ness, Rockwell R121
D256 Izod notched impact (ft-lb/in) 1.6
D696 Coef­fi­cient of lin­ear ther­mal expan­sion (x 10–5 in./in./°F) 3.7
D648 Heat deflec­tion temp (F°/C°) at 264 psi 217/103
D3418 Melt­ing temp (F°) N/A
- Max oper­at­ing temp (F°/C°) 200/93
C177 Ther­mal con­duc­tiv­ity (BTU-in/ft²-hr-°F) 0.95
UL94 Flam­ma­bil­ity rating V-0
D149 Dielec­tric strength (V/mil)
short time, ⅛” thick
D150 Dielec­tric con­stant at 60 Hz 3.7
D150 Dis­si­pa­tion fac­tor at 60 Hz -
D257 Vol­ume resis­tiv­ity (ohm/cm) at 50% RH 3.4 x 1015

These are typ­i­cal val­ues for ref­er­ence and com­par­i­son only. They should not be used as a basis for design spec­i­fi­ca­tions or qual­ity con­trol. Con­tact us for the man­u­fac­tur­ers’ com­plete mate­r­ial prop­erty datasheets. All val­ues were taken at 73°F (23°C) unless oth­er­wise noted.

Don’t see what you’re look­ing for? Call us at 800–423-2769 or email us at tom@crownplasticsinc.com.