Polypropylene piping for high purity systems
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 an system
that can be relied on in your high purity situations.
Orion Standardline systems are manufactured from virgin Type II copolymer polypropylene.
Polypropylene demonstrates these advantages:
- Specific Gravity-polypropylene is the lightest of all plastics, weighing approximately
two-thirds as much as PVC and one-eighth as much as steel.
- Tensile Strength-polypropylene is the strongest of the polyolefin resins. This strength
is retained over a wide range of temperatures. At 200°F the tensile strength is 1700 psi.
- Flexural Strength-polypropylene is classed as a rigid plastic.
- Hardness-polypropylene indicates good abrasion resistance.
- Heat Distortion-the heat distortion temperature of polypropylene is the highest of all
the low-cost plastics. Its maximum use temperature is higher than other polyolefins, PVC,
and other low-cost plastics.
- Thermal Properties-polypropylene is one of the best plastic insulators.
- Electrical Properties-these are rated excellent.
- Impact Strength-polypropylene has an intermediate impact strength with respect to normal
and impact PVC. Impact decreases with lower temperatures.
- Ultraviolet Stability-None. Orion 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. It is stress-crack resistant
unlike linear polyethylene.
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.
- Non-leaching-PVDF adds no detectable leachants or other contaminants to solutions.
- Smooth walls-The extra smooth walls PVDF produces help assure turbulent-free flow of
liquids and prevent the collection and breeding of fungi, bacteria and other biological impurities.
- Chemical resistance-PVDF offers 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;
- Extended operating range-PVDF is able to maintain a high degree of its strength and
chemical resistance within a temperature range of -40°F to 280°F.
- Durability-PVDF’s high density (up to twice as dense as polypropylene) means it can take
lots of abuse. That makes it an ideal choice in vibration-or impact-prone applications.
- Aging and stability-PVDF is designed to withstand direct sunlight-or be buried-while retaining
its physical properties for a minimum of 20 years.
- Fungus resistance-PVDF will not support growth of fungi when tested by Method 508 of MIL STD 810