Development of elbowless-piping produced by induction bending -elimination of elbow-welding in petrochemical plant construction-

摘要

Welding elbows have been used for piping of petrochemical plant, but elimination of elbow welding has been desired to reduce the cost of piping construction. For this purpose, the authors developed the Elbowless piping produced by inductionheating and bending which could change long straight pipe to three-dimensionally bent pipe. The technical points are as follows:1) development of new chemical composition to prevent the formation of hardened structure.2) development of bent pipe excellent in strength characteristics with a sectional demension.It is proved that Elbowless pipe is mechanically safer than elbow, and that present standards of piping design can be applied for Elbowless, too. This elbowless piping was adopted for LPG plant, Arun, Indonesia.