Materials for High Purity Piping

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Polypropylene Piping

Our Whiteline systems for high purity piping are manufactured from pure virgin unpigmented Type I homopolymer polypropylene. No anti-oxidants, pigments, or other foreign substances are added to the resin in the manufacture process. This manufacturing process produces a system that can be relied on in your high purity situations.

Orion Standardline systems are manufactured from virgin Type II copolymer polypropylene.

Advantages include:

  • Specific Gravity- The lightest of all plastics, polypropylene weighing approximately two-thirds as much as PVC and one-eighth as much as steel.
  • Tensile Strength- The strongest of the polyolefin resins, this strength is retained over a wide range of temperatures. E.g. at 200°F the tensile strength is 1700 psi.
  • Flexural Strength- Classed as a rigid plastic.
  • Hardness- Good abrasion resistance.
  • Heat Distortion- The highest of all the low-cost plastics, polypropylene's maximum use temperature is higher than other polyolefins, PVC, and low-cost plastics.
  • Thermal Properties- One of the best plastic insulators.
  • Electrical Properties- Excellently rated.
  • Impact Strength- Intermediate impact strength with respect to normal and impact PVC. Impact decreases with lower temperatures.
  • No Ultraviolet Stability- Our high purity systems contain no ultraviolet inhibitor and therefore must be protected from direct sunlight or ultraviolet rays.
  • Burn Characteristics- Polypropylene is classed as slow burning and stress-crack resistant unlike linear polyethylene.
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Polyvinylidene Fluoride (PVDF)

Orion’s Ultra high purity system is for those critical high purity liquid transportation situations when you absolutely, positively cannot tolerate extractables. It is manufactured from 100% pure, virgin, KYNAR® PVDF (Polyvinylidene fluoride) resin.

Features:

  • No detectable leachants or other contaminants to solutions.
  • Extra smooth walls help assure turbulent-free flow of liquids and prevent the collection and breeding of fungi, bacteria and other biological impurities.
  • Excellent chemical resistance to weak acids, strong acids, oxidizing acids, mixed acids, organic solvents and many aggressive gases. Such resistance makes it an ideal choice for severe applications such as chemical, cosmetic, pharmaceutical, and medical.
  • Able to maintain a high degree of its strength and chemical resistance within a temperature range of -40°F to 280°F.
  • PVDF’s high density (up to twice as dense as polypropylene) means it can take lots of abuse, making it an ideal choice in vibration-or impact-prone applications.
  • Designed to withstand direct sunlight or be buried without losing its physical properties for a minimum of 20 years.
  • PVDF will not support growth of fungi when tested by Method 508 of MIL STD 810.