FIELD: process engineering.
SUBSTANCE: invention can be used in erection of various pipeline systems, particularly, water supply, air conditioning and heating. Thin-walled sleeve 5 composed of tube length with bent-off collar is fitted into tube end 1 against the stop. Simultaneously, outer surface of tube 1 and coupling inner surface 2 are heated by welding adapter heater to melting of their thermoplastic material. Then, tube end 1 is fitted inside coupler 2, both being cured unless hardening of thermoplastic material with formation of welding zone 8. Sleeve 5 is longer than zone 8.
EFFECT: higher continuity and homogeneity of welding zone, rules out contraction of pipeline flow section in said zone.
23 cl, 4 dwg
