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Founded in 1968, PolyFab provides custom engineered plastic fabrications.

We work with many materials and specialize in clear plastics.

Some of the applications we have made include:

  • Large graduated cylinders
  • Architectural formed pieces
  • LEXAN® Tanks and waterbaths
  • Clear PVC and acrylic assemblies
  • Laboratory splash guards and custom trays for all industries
  • Plastic flooring and secondary containment basins
  • Custom PVC, CPVC, polypropylene and HDPE duct work
  • Fume hoods made from any weldable plastic material
  • Marine fresh, gray, and black water tanks
  • Custom polypro and HDPE tanks for chemical storage and treatment
  • Machined polyethylene fittings
  • Routed plastic and wood signs

Click on the navigation to the left for specific product photos, and along the top for application-specific photos and information. We look forward to being of service to you!

HDPE Coupling

The performance of a corrugated High Density Polyethylene (HDPE) pipe under high earth load was investigated. The cross-sectional shape of the pipes were essentially round after 5 years of burial. However, visual observations showed the development and growth of circumferential cracks in the unlined corrugated pipe and buckling of the unsupported portions of the liner in the smooth wall corrugated pipe. The cracks were mainly in the inside corrugation crests within the coupling length. The liner buckles were in the bottom half of the pipe. Material property tests on HDPE specimens cut from pieces of pipe showed the existence of longitudinal residual tensile stress in the pipe wall that were close to the yield stress of the HDPE. These residual stresses combined with longitudinal tensile stress induced by the coupling were probably the main cause of the crack development in the field. Laboratory tests were conducted on short lengths of pipe in ring bending and in hoop compression. The ring bending tests showed that the material modulus under short-term deflection increments does not diminish with time, whereas the apparent modulus under sustained deflection decreases with time. The hoop compression tests showed circumferential shortening, corrugation closure and liner buckling under external radial pressure consistent with the field observations.

Credit: HDPE Coupling

HDPE CouplingPlease Contact Us to discuss your HDPE Coupling needs. You design it, we build it.

  • Fume Hood
  • PVC Duct
  • Acrylic Fabrication
  • Fume Hood Laboratory
  • Grillwork
  • Polyethylene Duct
  • Chemical Fume Hood
  • HDPE Tank
  • Plastic Flange
  • CNC Routing Services MA
  • HDPE Duct
  • Water and Air Treatment Home
  • Exhaust Ventilation System
  • CNC Router Services Boston
  • CPVC Duct
  • Fume Hood Mfg
  • Exhaust Fume Hood
  • Flange Plastic
  • Plastic Flange Bearing
  • Industrial CNC Routing Massachusetts
  • Lexan Fabrication
  • Acid Fume Hood
  • Fume Hood Manufacturer
  • Laminar Air Flow Hood
  • PVC Duct Fittings
  • Uhmw Machining
  • Fume Hood Labconco
  • Cylinder Diagram Graduated
  • PVC Cone
  • Acrylic Cone
  • Benchtop Fume Hood
  • Lexan Machining
  • Walk In Fume Hood
  • HDPE Coupling
  • Large PVC Duct
  • Drape Forming
  • Clear Polycarbonate Pipe
  • CPVC Wye
  • Plastic Fume Hood
  • PE Flanges
  • PVC Reducing Wye
  • Polyethylene Flange
  • PE Coupling