Pipe Thermal Expansion Calculator
Calculate expansion and loop requirements for piping
Pipe Run
Temperature Range
Installation/ambient temp
Operating temperature
Expansion Results
Total Expansion
--
Expansion per 100 ft
--
Temperature Change
--
Expansion Coefficient
--
Expansion Loop Required
--
Important: Uncontrolled thermal expansion can damage joints, fittings, and equipment. Always provide for expansion.
Expansion Loop Sizing
Loop Height (H)
--
Loop Width (W)
--
Offset Required
--
Expansion Coefficients by Material
| Material | Coefficient (in/in/F) | Expansion per 100 ft per 100F | Relative Expansion |
|---|---|---|---|
| Copper | 9.8 x 10^-6 | 1.18" | Medium |
| CPVC | 3.4 x 10^-5 | 4.08" | Very High |
| PEX | 1.0 x 10^-4 | 12.00" | Extremely High |
| PVC | 2.8 x 10^-5 | 3.36" | High |
| Carbon Steel | 6.5 x 10^-6 | 0.78" | Low |
| Stainless Steel | 9.6 x 10^-6 | 1.15" | Medium |
| Cast Iron | 5.6 x 10^-6 | 0.67" | Low |
Expansion Control Methods
Expansion Loops
U-shaped pipe detour
No maintenance needed
Space required
Offsets
Direction changes
Built into layout
Minimum 2x expansion
Expansion Joints
Bellows or slip type
Space efficient
Maintenance required
Flexible Connectors
Braided hose
Equipment isolation
Limited movement