This case study describes the use of fiberglass pipe and ducting in an ethanol plant. Fiberglass pipe between 1-42 inches in diameter was used for applications like anaerobic sludge, biogas, dilution water, and wastewater. Custom fiberglass ducting was also utilized to transport biogas and gas streams containing substances such as ammonia and hydrogen sulfide under pressure and at high temperatures. The case study provides specifications on the fiberglass materials used, including the manufacturer, construction method, standards, and applications within the ethanol facility.

1. Sutherland D. Junge
Fluid Technology Corporation
1631 NE 55th Ave.
Des Moines, IA 50313
Office: (515) 263-9210
Cell: (319) 899-6313
Email: sutherland@fluidtechcorp.com
Web: www.fluidtechcorp.com
Case Study 13: Fiberglass Application in Ethanol Plant
Project Details
Fiberglass pipe specifications:
 NOV Fiberglass Systems’ Green Thread Pipe
 Filament Wound Construction
 ASTM 2996
 1” through 42”
Fiberglass pipe applications:
 Anaerobic Sludge
 Biogas
 Biogas Condensate
 Dilution Water
 Distillate
 ICC Liquid Influent/Effluent
 FeCl Anitcoagulant
 Micronutrients
 NaOH (50%)
 Phosphoric Acid
 PT Effluent
 Seal Water
 SRT Influent/ Effluent
 Sulfur Sludge
 Tank Ventilation
 Tank Vents
 Thiopaq Liquid
 TPS Influent/ Effluent
 Wastewater
Fiberglass duct specifications:
 Custom FRP Duct
 Filament Wound Construction
 Vinyl Ester Resin (Derakane 510-C)
 ASTM E-84 Class I with Flame Retardance
 UV Inhibitors with White Pigmentation
Fiberglass duct applications:
 Biogas and Biogas Relief (15” w.c. vacuum
pressure with a service temperature of 120°F)
 Gas streams, which may include ammonia,
carbon dioxide, hydrogen, hydrogen sulfide,
methane and/or water (15 psig design
pressure with a service temperature of 104°F)