Feasibility of in situ lining rehabilitation of small diameter heat distribution pipe

Conference · Fri Dec 01 04:00:00 EST 1995

OSTI ID:128631

Cardenas, H E; Hock, V F; Segan, E G ^[1]

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1. Army Construction Engineering Research Labs., Champaign, IL (United States)

Many pipeline rehabilitation methods are available for large pipe systems greater than 2 inches in diameter. For small internal systems with many lateral connections, the cost of these methods becomes exorbitant. This study examined the feasibility of an in situ lining rehabilitation concept for small pipelines that involves minimal surface preparation. This work addressed: testing and modification of candidate liner resins, hydraulic analysis of lining impact on pipe flow, and the life cycle cost comparison of applying a liner compared with typical plumbing maintenance practices. Analytical projections based on these analyses revealed a potential source of life cycle cost savings by applying this rehabilitation process to condensate return lines. A liner formulation involving Bisphenol-A and 1% silica addition exhibited sufficient high temperature immersion resistance to operate in a condensate return line. The mathematical liner impact model developed herein provides a qualitative representation of the liner impact on flow. Analytical findings derived from this model indicated that power savings are significantly dependent on pipe diameter and flow rate. A present worth, life cycle cost analysis revealed that if the cost of in situ rehabilitation is roughly 50% of replacement, the benefits may be revealed in terms of avoided operations, maintenance, and repair costs.

• OSTI ID: 128631
• Report Number(s): CONF-950304--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
BENCH-SCALE EXPERIMENTS
CORROSION PROTECTION
COST BENEFIT ANALYSIS
EPOXIDES
FLUID FLOW
LINING PROCESSES
PERFORMANCE
PIPELINES
SILICA
SILICONES
STEELS