Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Thermoplastic Pipes - Strength Derating vs. Temperature

Increased temperatures derates the strength of thermoplastic piping materials.

Sponsored Links

Thermoplastic materials loose strength to pressure and tension with increasing temperature. The table below can be used as a guide to common thermoplastics and their derated strength with temperature. Manufacturing data should always be consulted.

Thermoplastic Pipes - Strength Derating vs. Temperature
Derating Factor
TemperaturePVDFCPVCPVCPBPEXPE
(oC)(oF)
21 70 1.0 1.0 1.0 1.0 1.0 1.0
27 80 0.9 1.0 0.9 1.0 0.9 0.9
32 90 0.9 0.9 0.8 0.9 0.9 0.9
38 100 0.8 0.8 0.6 0.9 0.9 0.8
43 110 0.8 0.8 0.5 0.8 0.8 0.8
49 120 0.7 0.7 0.4 0.8 0.8 0.7
54 130 0.7 0.6 0.3 0.7 0.8 0.5
60 140 0.6 0.5 0.2 0.7 0.7 0.4
66 150 0.6 0.5 1) 0.7 0.7 0.2
71 160 0.5 0.4 1) 0.6 0.7 1)
82 180 0.5 0.3 1) 0.5 0.6 1)
93 200 0.4 0.2 1) 0.4 0.5 1)
104 220 0.4 1) 1) 1) 1) 1)
121 250 0.4 1) 1) 1) 1) 1)
138 280 0.3 1) 1) 1) 1) 1)

1) The thermoplastic is not resistant for long term service at this temperature. Operating conditions should be avoided.

  • PVDF - PolyVinylidene Fluoride
  • CPVC - Chlorinated Polyvinyl Chloride
  • PVC - Polyvinyl Chloride
  • PB - Polybutylene
  • PEX - Cross Linked Polyethylene
  • PE - Polyethylene

Plastic Pipes Temperature Derating Diagram

Thermoplastic pipes - temperature and strength and stiffnes diagram

Thermoplastic pipes - temperature and strength and stiffnes diagram

Example - Higher Temperature and Reduced Strength

If the operating pressure for a 6" Schedule 80 CPVC pipe is 167 psi, the maximum operating pressure at 150 oF (66 oC) is reduced to

(167 psi) 0.5

    = 83.5 psi

Sponsored Links

Related Topics

  • Material Properties

    Material properties of gases, fluids and solids - densities, specific heats, viscosities and more.

  • Pressure Ratings

    Pressure ratings of pipes and tubes and their fittings - carbon steel , stainless steel, plastic, copper and more.

Related Documents

Sponsored Links

Search

Search is the most efficient way to navigate the Engineering ToolBox.

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

Translate this Page

Translate this page to Your Own Language .

About the Engineering ToolBox!

Privacy Policy

We don't collect information from our users. More about

Citation

This page can be cited as

  • The Engineering ToolBox (2004). Thermoplastic Pipes - Strength Derating vs. Temperature. [online] Available at: https://www.engineeringtoolbox.com/thermoplastic-pipes-temperature-strength-d_794.html [Accessed Day Month Year].

Modify the access date according your visit.

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter

















































12.8.9

Sponsored Links
.