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UHMWPE Material

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Basic Summary

Ultra High Molecular Weight Polyethylene (UHMWPE) is a modern polyethylen. To be classified as Ultra High Molecular Weight, the molar weight has to be in the millions. Usually between 2.5m g/mol to 5.5m g/mol. Compared to HDPE which is closer to several hundred g/mol.

Longer chains, woven properly, result in obvious material advantages in almost any fluid handling application.

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The clearest and most domineering disparity is with High Density Polyethylene (HDPE).

Not only is UHMWPE lighter, but simply put it is better in every possible way:

• 10x more abrasion resistant (via proven testing)
• 5x lower surface roughness (ISO )
• Increased temperature capability (particularly in the lower range), capable of -70 to +80 deg C operation
• Comparable elongation performance
• Anti-aging agent reduce UV degradation by comparison and otherwise increases design life
• Colourless, odourless and non-toxic
• Formed flanges, allowing for clean alignment. Mn16 inserts used at flange end to reduce turbulence down the pipe or bend
• Much higher corrosion resistivity, comparable to Teflon
• Higher tensile and yield tolerances
• Adders can be provided that make UHMWPE flameproof (allowing for minimal degradation in environments where this is a factor, UHMWPE will still ignite at 300 deg C, but will immediately self-rectify)
• Lighter and more durable, allowing for heavily reduced installation costs as large excavation and crane equipment will no longer be required
• Unlike other materials, UHMWPE is self-lubricating (part of why it is used as a ball material for hip joint replacement)

All this allows UHMWPE to improve on ANY process currently utilising HDPE and most that include Steel.

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