Green Thread Fiberglass Pipe

Green Thread pipe and fittings are an excellent choice for applications such as dilute acid, caustic applications, produced water, industrial waste, hot water, and condensate return.


Green Thread high-pressure (HP) pipe is a filament-wound product using amine-cured epoxy resins and fiberglass as well as a resin-rich liner reinforced with a surfacing veil for superior corrosion resistance. It is recommended for dilute acids and caustics. Pipe and fittings are available in 1- through 16-in. diameters with pressure ratings up to 450 psig static at a maximum operating temperature of 225 °F; 18- to 24-in. diameters are available upon request. The 1- through 6-in. pipe diameters are available in 20-ft random lengths, and the 8- through 24-in. diameters are available in 19- or 39-ft random lengths.

Green Thread pipe is lightweight compared to steel, black iron, copper, and stainless steel. When considering total installed cost, Green Thread piping provides significant savings due to its light weight and ease of installation. No heavy handling equipment is required, and the load that Green Thread pipe adds to a structure is minimal compared to other materials. For example, 4-in. Green Thread pipe weighs only 1.2 lb/ft compared to 5.6 lb for Schedule 10 stainless steel. Green Thred HP fiberglass pipe also carries NSF Standard 61 for potable water service.


  • Chemical and industrial
  • Mining
  • Oil and gas

Green Thread Fiberglass Pipe Specifications

Green Thread HP16, HP20, HP25, HP32, and HP40
Size range 1 to 42 in.
Inner corrosion barrier 20 mil lin
Pressure ratings 225 to 450 psig
Temperature range Up to 230 °F (110 °C)
Joining Bell and spigot and flanged
Fittings Bell and flanged
Chemical service Process water, dilute acids, caustics, and hot brine
  • Green Thread HP 16 Data Sheet

  • Green Thread HP 16 Piping System Spec Sheet

  • Green Thread HP 20 Data Sheet

  • Green Thread HP 25 Data Sheet

  • Green Thread HP 25 Piping System Spec Sheet

  • Green Thread HP 32 Data Sheet

  • Green Thread HP 40 Data Sheet

  • HP 16 Epoxy Fittings Data Sheet

  • HP 16 Large Diameter (LD) Epoxy Fittings Data Sheet

  • HP 25 Epoxy Fittings Data Sheet

  • HP 32/40 Epoxy Fittings Data Sheet

  • Secondary Containment Pipe and Two-Piece Fittings Data Sheet

  • Chemical and Industrial Piping Systems Brochure

  • Chemical-Industrial Distribution List

  • Red Thread HP, Green Thread HP, and Silver Streak Pipe Installation Handbook

  • Fiberglass Engineering and Piping Design Guide

  • 36" Green Thread Hot Process Water Pipeline (Alberta, Canada) Case Study

  • Ashridges Bay Water Treatment Plant (Ontario, Canada) Case Study

  • Chilled and Hot Water Piping (Wisconsin) Case Study

  • Hospital in Nebraska Cooling Tower Case Study

A line of Green Thread Fiberglass Pipe being laid in a snowy landscape

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