The major effort in analyzing new pipe systems added to an existing system is in dealing with the existing piping. In all cases the existing piping must be modelled along with the new system and the location of the new branch connection is critical. In many cases the existing piping must be re-supported.
Typical problems seen in the design process are inadequate specification of design versus operating pressure, small branch pipes off large pipes with not enough flexibility, branch pipes next to elbows, and inadequate specification of complex pipe supports. These problems will be illustrated with actual case studies and mitigation measures shown.
John Stephens, P.Eng., has 41 years of experience in the design and management of heavy industrial projects, including zinc pressure leaching, lead smelting, bulk vitrification, ammonia production, and sulphur dioxide recovery. His expertise includes pressure vessel design and repair, piping stress analysis and design, and engineering management.
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