METHOD FOR PROTECTING UNDERGROUND PIPELINES FROM FREEZING Russian patent published in 2018 - IPC E03B7/12 F16L59/15 

Abstract RU 2642084 C1

FIELD: construction.

SUBSTANCE: invention relates to public construction. Method comprises forming an anti-corrosion coating and heat insulation on pipeline (3), laying said pipeline in trench (2), followed by filling the trench with soil. Heat insulation on pipeline (3) with an anti-corrosion coating is formed after placing it in trench (2) by filling it with layer of sand (4) up to 2 times diameter (d) of pipeline (3) and wetting said layer using a known method with an aqueous salt solution of given concentration and subsequent filling of the final trench with soil (5).

EFFECT: improved heat-shielding properties of the pipeline in the trench from the effect of drop in sub-zero temperatures.

4 cl, 1 dwg

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RU 2 642 084 C1

Authors

Grigorev Vladimir Stepanovich

Dates

2018-01-24Published

2017-03-30Filed