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Ammonia Reactor
Solution: Not
only was the initial cost for the Superbolt Tensioners only a fraction
of the cost of the hydraulic tensioners, but the installation time
was much faster. Total tightening time with two laborers was only The plant saved several times the cost of the tensioners in labor and downtime as the reactor had to be closed and opened several times due to problems with internal components.
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Problem: This
large ammonia reactor required the use of two very expensive, very
large hydraulic tensioners. Prior to the use of Superbolt, tensioning
or detensioning required 3 days, working around the clock. The
6,500 lb. tensioners had to be manipulated by two cranes, and each
stud required several passes. Work was reportedly very strenuous
in addition to being time consuming.