Introduction

One of the most serious problems in strategic pipeline projects is the needfor reliable power for unattended stations in the severe environments underwhich these pipelines must continuously operate (temperatures as low as -55°C(-67°F) in winter, roads to the stations inaccessible for long periods of timemaking the stations inaccessible for maintenance crews, etc).

The objectives for high reliability in BGV/RGV operation, telecommunications, cathodic protection and SCADA/RTU systems in strategicprojects have become staggering. In areas not serviced by commercial power, theproblems faced by the power systems designers are very stringent since thestations equipment must operate continuously on a 24 hour-per-day basis 365days-per-year.

A critical element in the Remote BGV/RGV Stations are the shelters that musthouse all telecommunication, SCADA/RTU, cathodic protection equipment, batteries, UPS, HVAC and fire protection equipment, etc., while maintainingtemperatures enabling correct operation of the installed equipment under thewhole range of ambient conditions, including high winds, strong earthquakes, high snow and rains.

Telecommunications, SCADA, cathodic protection facilities along oil and gaspipelines are mission-critical, carrying vital performance, telemetry andcontrol data without which the pipeline cannot operate.

The use of specially designed, corrosion-proof, weather-proof andwater-proof arctic type, equipment shelters has assisted in solving some of themost stringent problems of the pipeline operators: reliable operation withmaintenance requirements reduced to a visit only once in 6 months or more, andrequired temperature ranges in equipment shelters are maintained, assuringcorrect operation of the sensitive electronics for very long periods of timeexceeding 20 years. Ease and safety of transportation on difficult roads andease of installation in remote areas are paramount factors in the design andconstruction of the shelters.

This paper reviews the key criteria to consider in designing the equipmentshelters and selecting their construction for remote site applications andtheir performance is reviewed. The paper goes on to present case histories inpipeline applications, in Sakhalin and Siberia, which demonstrate their fieldreliability and performance.

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