LIQUID DISTRIBUTION SYSTEMS - PREINSULATED AND HEAT - TRACED PIPING FOR POLAR CAMPS.

Freeze-protected piping systems suitable for installation in temperatures to -30 degrees F and operation in temperatures to -65 degrees F are required for distributing water and collecting sewage at polar installations. A study is being made of piping, insulating materials, field assembly techniques...

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Bibliographic Details
Main Author: Hoffman, Clark R.
Other Authors: NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
Format: Text
Language:English
Published: 1968
Subjects:
Pumps
Filters
Pipes
Tubing
Fittings & Vlvs
*PIPES
ARCTIC REGIONS
WATER SUPPLIES
SEWAGE
THERMAL INSULATION
ASSEMBLY
COLD WEATHER TESTS
SIZES(DIMENSIONS)
SOLDERING
FREEZING
COMPATIBILITY
BRAZING ALLOYS
NAVAL SHORE FACILITIES
PIPELINES
Arctic
Barrow
Point Barrow
Alaska
Online Access:http://www.dtic.mil/docs/citations/AD0827791
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0827791
Description
Summary:Freeze-protected piping systems suitable for installation in temperatures to -30 degrees F and operation in temperatures to -65 degrees F are required for distributing water and collecting sewage at polar installations. A study is being made of piping, insulating materials, field assembly techniques, and maintenance procedures to develop design criteria for preassembled piping materials and fittings suitable for these systems. Low-temperature cold chamber tests were made on the Triangle Conduit and Cable Company's underground X-50 preinsulated piping and fittings with preapplied Electro-Trace Corporation Electro-Wrap heating elements. These tests indicated that this piping is adequate for transporting freezable liquids in temperatures down to -65 degrees F in sizes up to 4 inches when traced with an 8-watt-per-foot heating element. In pipe sizes between 4 and 8 inches, it is adequate for this purpose when traced with a 25-watt-per-foot heating element. It was concluded that with minor manufacturing changes to simplify assembly, the underground X-50 piping system is suitable for installation and operation at low temperatures when manufactured within the specified tolerances. A piping system nearly identical to that tested by NCEL is being installed to carry water and sewage at the new Arctic Research Laboratory at Point Barrow, Alaska. The system is being installed by contract; upon completion, it will be instrumented and monitored by NCEL during the first year of use. (Author)

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