FIELD: piping systems for transportation of aggressive liquids. SUBSTANCE: pipe is provided with protective bushings fitted on and secured on ends of pipe. Bushings are made of metal containing carbon in amount of 0.07-0.14%. Ends of bushings project beyond pipe ends through length greater than thickness of pipe wall and are connected with ends of pipe by nondetachable mechanical joint and weld. EFFECT: simplified design and reduced cost of manufacture. 4 cl, 4 dwg
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