SPECIAL PIPE AND FITTINGS

High performance polymer pipe systems used in high temperature, corrosive chemicals or special process conditions
SPECIAL PIPE AND FITTINGS
In cases where standard HDPE or PVC systems are insufficient, in high temperature, corrosive chemicals or special process conditions, pipe and fitting systems produced from different thermoplastic materials are preferred.
These materials are high performance polymers such as PP, PVDF, PVC-C, ECTFE, PFA and PTFE. Each offers optimum performance in different temperature ranges, chemical environments or mechanical conditions.

MATERIALS AND PROPERTIES

MaterialFull NameWorking Temperature (°C)Chemical ResistanceMechanical StrengthColorTypical Usage Area
PP-H / PP-R / PP-CPolypropylene Homopolymer / Random / Copolymer0…+100High to acids, bases, salt solutionsMediumGray / Light grayChemical tank lines, hot water, galvanizing facilities
PVDFPolyvinylidene Fluoride-30…+140Excellent against acid, base, oxidant and solventsHighWhite / TransparentChemistry, pharmaceutical, semiconductor, food, ultra pure water systems
PVC-UPolyvinyl Chloride (Unplastified)0…+60Resistant to acids and bases, limited to solventsMediumGrayLow temperature chemical drains
PVC-CChlorinated PVC0…+95Good in acid, base, chlorine, ozone environmentsMediumLight grayHot water, chlorinated fluid lines
ECTFEEthylene Chlorotrifluoroethylene-40…+150Very high to strong acids, solvents, chlorine environmentsHighWhite / TransparentCorrosive gases, high purity systems
PFA / PTFEPerfluoroalkoxy / Polytetrafluoroethylene-50…+200Almost complete resistance to all chemicalsMediumWhite / OpaqueExtremely corrosive environments, lab process lines
HDPE / PE100High Density Polyethylene-30…+60Resistant to acid, base, salt waterMediumBlackSeawater, drainage, low temperature chemical lines

MATERIAL SELECTION CRITERIA

Temperature

  • PP or PVC-U in general applications below +60°C

  • PP-R or PVC-C in hot water or chemical lines between +80–100°C

  • PVDF, ECTFE, PFA or PTFE are preferred at temperatures above +120°C or in high oxidation environments.

Chemical Environment

  • Acids (H₂SO₄, HCl, HNO₃ etc.): PVDF or ECTFE

  • Alkali environments (NaOH, KOH): PP or PVDF

  • Oxidizing chemicals (Cl₂, H₂O₂, ozone): PVDF or ECTFE

  • Solvents (Acetone, Toluene): PFA / PTFE

  • Salty or seawater: HDPE, PP-H

Pressure and Mechanical Strength

  • High pressure lines: PP-R, PVDF, PVC-C

  • Low pressure and drainage lines: PVC-U, HDPE

  • For rigid and long-lasting structures: PP-H and PVDF

APPLICATION AREAS

  • Chemical Industry: Acid-base transport lines, solvent recovery systems

  • Galvanizing and Surface Coating: Acidic and hot chemical tank connections

  • Pharmaceutical and Food Production: Hygienic, heavy metal-free pipe systems

  • Power Plants: Cooling, condensation and chemical water circuits

  • Seawater Systems: Corrosion-free intake and discharge lines

  • Laboratory Systems: Pure water, waste acid drainage and ventilation lines

  • Semiconductor Production: Ultra pure water (UPW) and high purity processes

    • SECTORAL USAGE GUIDE

    SectorRecommended MaterialTypical Usage
    Chemistry / Petro-ChemistryPVDF, ECTFE, PP-HAcid-base and solvent lines
    Energy and Thermal Power PlantsPP-H, PVC-C, PE100Cooling, condensate and chemical water lines
    Food / PharmaceuticalPVDF, PFA, PP-RHygienic lines, hot water and CIP circuits
    Seawater / Salt Water SystemsHDPE, PP-HIntake-discharge, seawater transfer
    Surface Coating / GalvanizingPP-H, PVC-CAcidic baths, tank connections
    Laboratories / R&DPVDF, PTFEAcid drainage, vacuum lines, pure water
    Semiconductor ProductionPFA, ECTFEUltra pure water, high purity processes