• Designed for flow processing applications including high purity water for research laboratories, pharmaceutical and biotechnology food, beverage, brewery and dairy
  • Compatible with other sanitary systems
  • Easy to install and maintain
  • Substantial savings over other sanitary process systems
  • Total system availability
  • Superior corrosion and chemical resistance
  • Specifications for Polypropylene


Tubing and fittings shall be virgin, high strength, natural unpigmented Polypropylene Copolymer. Materials shall meet or exceed FDA 21 CFR 177.1520, USDA, 3-A and USP class VI as supplied by SPS.

Tubing and fitting dimensions shall conform to sanitary tubing inside diameter dimensions as indicated below.

Polypropylene Sizing Table
Normal Size Inner Diameter
in. mm
3/4" Mini 0.560 14.2
1" Maxi 0.856 21.7
1 1/2" 1.356 34.4
2" 1.856 47.1
2 1/2" 2.356 59.8
3" 2.856 72.5


Joining Techniques

All tubing and fittings shall be joined utilizing sanitary Tri-Clamp style ferrules or Smooth technology. Socket or butt fusion joining methods, which create an internal entrapment area, will not be accepted.

Sanitary ferrules shall be supplied as factory molded ends or field formed using SPS systems STFF Flange forming tools according to factory procedures and guidelines. All joints shall utilize a PVDF True Union Clamp and gasket assembly per factory specifications. High purity platinum cured silicone gaskets shall be the gasket material of choice unless prohibitive by media compatibility issues.

Fusion joints shall be performed using Smooth equipment and technology. Factory personnel shall train installers and all installation practices shall be in compliance with the manufacturer's recommendations.

Valves and Control Devices

All valves and control devices shall be unpigmented Polypropylene meeting the same standards as the tubing and fittings and supplied by the same manufacturer in order to ensure pure process compatibility with all components. All valves and devices will be supplied with either sanitary Tri-clamp style ends or plain ends prepared for fusion welding.