EXPANSION PIECE Russian patent published in 1998 - IPC

FIELD: erection of pipe lines. SUBSTANCE: expansion piece includes branch pipes with flanges, body assembled from two coaxial pipes, flexible diaphragms and hold-down rings. Side surfaces of body pipes are provided with coaxial holes and ends are connected by means of diaphragms for rolling over surface of hold-down rings on whose ends safety envelopes are secured. Arranged in inner pipe is profiled elbow fitted with medium flow stabilizer, fire-resistant casing being secures on outer pipe. EFFECT: enhanced reliability. 3 dwg