| 摘要 |
FIELD: pipe manufacturing industry. SUBSTANCE: method includes filling space between threaded portions with water- tightening material. As water-tightening material a composition of graphite with copolymer of tetrafluorinethylene and hexafluorinepropylene. Said water- tightening material is applied to threaded surface by powder spraying in electrostatic field. EFFECT: increased quality of threaded connections water-tightening, simplified technological process thereof. 3 cl |
