FIELD: building, namely erection and exploitation of pipelines.
SUBSTANCE: double-layer branch pipe may rotate by angle 
, it has curvilinear portion and straight end portions with flanges. Inner fluid-tight layer is made of metallic or plastic tube. Outer layer is in the form of braided tubular carcass impregnated with polymeric binder which is cured then. Curvilinear portion of branch pipe is formed by means of three mutually joined circle arcs: mean arc is restricted by angle 180 degrees, terminal arcs are restricted by angle 
.
EFFECT: enlarged assortment of branch pipes.
1 dwg
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