I have been working in the industrial construction trades for 43 years with piping being my background. I come up through the trades working as a pipefitter and welder, working my way into management and engineering. I have worked in refineries, petro chemical plants, gas plants, power plants, compressor stations, gold mines, co2 injection & recovery, pipelines, ethanol plants, etc. During the years of working in these plants I have seen some of the problems encountered when hydro testing piping systems. Leaks are the major malfunction when trying to sell off a test. Improper bolting procedure and tightening of bolts is always the factor in successfully completing a hydro test. This book… will give you the information you need to select the proper torqueing procedure and sequencing of tightening of bolts.