METHOD FOR MANUFACTURE OF T-JOINT Russian patent published in 2003 - IPC

FIELD: members of pipe-lines manufactured of polymeric end composite materials. SUBSTANCE: the pipe-lines are designed for transportation of liquid and gaseous media under pressure. The T-joint as a member of the pipe-line provides for its branching in two directions. Such T- joints may be used in pipe-lines used in chemical, petroleum, food and other, branches of industry. The method consists in the use of finished pipes, cutting-out of blanks from them, joining and sealing of the joint. For strengthening the T-joint use is made of tubular reinforcing blanks manufactured of a wicker framework. The blanks are fitted on the T-joint ends and impregnated by binder. Then underwinding by braids or band with a binder and hardening of the binder are carried out. The quantity of tubular reinforcing bands from a wicker framework may be different. Nicks along the generating line are made of the tubular reinforcing blanks is carried out in turn with putting- on of each blank in several blanks or after putting-on of all blanks. Underwinding is accomplished over the fitted and impregnated by binder reinforcing blanks by spiral-circular and cross methods. EFFECT: enhanced strength of the T-joints operating under high pressures, reduced labor content of their manufacture and consumption of raw material. 5 cl, 2 dwg