Inspection of Pipe Supports, Shoes, Stops, Guides, Restraints, Springs and Hangers: What is Involved and What to Look For

摘要

The API and ASME Piping Codes have long recognized the need to perform regular monitoring of pipe supports and restraints at refineries and power plants. This is true not only of existing plants but also of new plants. The condition of pipe supports and restraints is an external barometer of hidden problems with the piping and attached equipment. Recognizing pipe support and restraint distress can help prioritize pipe inspections and equipment maintenance. The first part of such a surveillance program is setting up the program. This should include: a.) defining the piping systems that will be monitored, b.) collecting survey documents, c.) setting up a schedule to perform the work, d.) training plant personnel who will be performing such a program and e.) obtaining a commitment by the plant/owners to maintain the program through the life of the plant. This paper discusses experiences and lessons learned setting up such programs. Topics will include: 1.) what is a pipe support and restraint, 2.) types of pipe supports and restraints, 3.) purpose of inspections, 4.) API 570/574 considerations, 5.) what we look for and 6.) how results are reported.