APPARATUS FOR SEALING BRANCH PIPE Russian patent published in 2001 - IPC

FIELD: branch pipes of pressurized vessels. SUBSTANCE: apparatus for sealing branch pipe of inner sealed envelope in mouth of high pressure vessel having heavy envelope of housing made of composition material includes flange arranged on branch pipe and having disc embraced by heavy envelope of housing, sleeve arranged in axial openings of branch pipe and flange and restricting annular cavity for placing sealing member and ring. Apparatus also includes attachment for fixing sleeve and it is provided with locking ring having one tapered end surface. Sleeve has flats and turning on outer surface at side of its open end. Flats form shoulders at side of open end of sleeve. Fixing attachment includes annular winding embracing flats, locking ring and remaining part of flange and forming one piece with heavy envelope of housing. EFFECT: enhanced reliability of sealing branch pipe with use of such apparatus. 6 cl, 5 dwg