Technical Comparison

PPR vs HDPE vs CPVC vs GI

A side-by-side technical comparison of the four major piping materials used in Indian industrial, commercial, and infrastructure projects.

PPR

Polypropylene Random Copolymer

Best for: Hot & cold water, process piping, compressed air

HDPE

High-Density Polyethylene

Best for: Underground mains, low-temp industrial, gas distribution

CPVC

Chlorinated Polyvinyl Chloride

Best for: Hot water plumbing, fire sprinkler systems

GI / Steel

Galvanised Iron / Carbon Steel

Best for: High-pressure steam, exposed outdoor, structural

Side-by-Side Comparison

Specification Comparison

ParameterPPRHDPECPVCGI / Steel
MaterialPP-R Type 3PE 100CPVC compoundMild steel / GI
Joint MethodSocket Fusion (260°C)Butt Fusion / ElectrofusionSolvent CementThreaded / Welded / Flanged
Max Temp80°C (continuous) / 95°C (peak)60°C (continuous)93°C (continuous)250°C+ (steam)
Max Pressure25 bar (PN25)16 bar (PN16)19 bar (at 23°C)40 bar+
Size Range20 mm – 160 mm20 mm – 630 mm15 mm – 50 mm15 mm – 300 mm
Service Life50+ years50+ years30–40 years15–25 years (corrosion-limited)
CorrosionExcellentExcellentGoodPoor (rusts over time)
Chemical ResistanceExcellentExcellentGoodPoor
UV ResistancePoorPoorFairExcellent
Thermal Conductivity0.24 W/m·K0.38 W/m·K0.14 W/m·K50+ W/m·K
Installation CostModerateModerateLowHigh
Weight vs Steel~1/8th~1/8th~1/6th
Selection Guide

When to Choose What

Choose PPR when…

  • You need hot water distribution (up to 80°C continuous)
  • Chemical resistance is critical for process piping
  • You want zero-corrosion, 50+ year design life
  • Fusion-welded joints eliminate leak points
  • You need sizes from 20 mm to 160 mm

Choose HDPE when…

  • You need large-diameter pipes (up to 630 mm)
  • Underground or subsea installation
  • Low-temperature impact resistance is important
  • You need trenchless installation (HDD, pipe bursting)
  • Gas distribution or slurry transport is the application

Choose CPVC when…

  • Budget is the primary constraint
  • Small-diameter hot water plumbing (15–50 mm)
  • Fire sprinkler system installation
  • Solvent cement jointing is preferred
  • Low thermal conductivity is beneficial

Choose GI / Steel when…

  • High-pressure steam is required (250°C+)
  • Exposed outdoor runs with no UV concerns
  • Structural / mechanical loads on piping
  • Threaded or welded connections are already in use
  • You can manage corrosion with coatings / cathodic protection

Need help selecting the right material?

Our technical team provides free consultation for pipe material selection based on your application requirements.