FIELD: process engineering.
SUBSTANCE: invention relates to construction of pipeline with internal coating with the help of welding. Weld of pipeline with internal coating comprises jar bush and sealant. Said composite jar bush consists of two bushings. Internal bushing is made of rustproof steel while external bushing is made of carbon or low-alloy steel. Jar bush is secured via external bushing by pipes weld while internal bushing features larger length than external bushing. Internal bushing extending end overlap the pipe internal coating. Sealant is fitted between extending ends of internal bushing ends and pipe ends.
EFFECT: higher reliability of weld and weld zone protection against corrosion.
5 cl, 2 dwg
