Steel-stiffened filament-wound double-wall fiberglass composite underground storage tanks

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:412102

Kaempen, C E ^[1]

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1. Kaempen & Associates, Anaheim, CA (United States)

This paper describes how a double wall filament wound glass fiber reinforced plastic underground storage tank (UST) can be stiffened by a non-removable steel frame mandrel that remains within the tank. A specific design is exhibited to show how a nonmetallic filament-wound UST can be made to have sufficient stiffness to resist, with negligible deflection, a hundred ton load of water and backfill while the tank bottom is unsupported for 66% of its width and as much as 80% of its length. The steel-stiffened double wall UST described in this paper consists of two independent concentric nonmetallic composite pressure vessels, separated by an annular space that has a bottom sump that can be monitored to provide warning of a leaking tank. This paper summarizes the extensive physical and chemical resistance tests conducted by Underwriters Laboratories, Inc. to qualify the nonmetallic underground storage tank at meeting the performance requirements outlined in Class 16 of the UL Standard for safety Subject 1316, which is believed to be the highest standard ever developed for the safe long term underground storage of flammable liquids. Some details relating to the cost and performance characteristics of the steel-stiffened nonmetallic composite tank are presented.

• OSTI ID: 412102
• Report Number(s): CONF-960310--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
COMPOSITE MATERIALS
CORROSION RESISTANCE
COST
DESIGN
FAILURES
FIBERGLASS
FLEXURAL STRENGTH
LEAKS
MECHANICAL PROPERTIES
PLASTICS
TANKS
TENSILE PROPERTIES