FIELD: metallurgy.
SUBSTANCE: metal tube has polymer coat with low surface energy. At least a part of said polymer coat is activated. A part of said polymer coat of the mainline constructed by area adjoining each uncoated section has activated surface. Fixation-prone coat with high surface energy is applied on said part with activated surface.
EFFECT: possibility to decontaminate surfaces in-situ prior to erection welding.
25 cl, 8 dwg, 3 tbl, 1 ex
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