CARBER Controlled Bolting Service Provides:

  • Leak-free startups
  • Increased equipment life due to systematic flange rotation
  • Reduction in time required to tighten assemblies
  • A proactive approach to joint integrity
  • Industry leading quality control, certification and all required calculations
  • Comprehensive data base software to maintain maintenance records

As the experts in the field, CARBER brings the best of what technology offers, as well as the technicians – dedicated, experienced and certified. CARBER has the resources and experience to execute virtually any bolting situation 24 hours a day.

CARBER maintains a rigid Quality Assurance program which exceeds prevailing industrial standards for both nuclear and non-nuclear work. All field personnel participate in formal training programs aimed at indoctrinating the employee to special technology as well as updating their skills as new developments evolve.

CARBER has the extraordinary flexibility to select and provide the best equipment available; allowing our technicians the ability to adapt in any situation and complete the job right the first time.

CARBER Controlled Bolting Services applies the most accurate and time-effective torque tightening technology to service your equipment.  Torque tightening uses the turning moment of a nut on the inclined plane of the thread at a predetermined force to load the fasteners, thus overcoming variables created by friction.

Bolt tensioning is the method of putting direct axial force on the fastener assembly without the influence of friction. A major advantage of controlled hydraulic bolt tensioning is not only the mathematically precise tensioning of the stud or bolt, but also the ability to simultaneously tension 4, 6, 8, 12 or more bolts.  This allows for simultaneous closure (10%, 20%, 25%, 50% or 100%) of the bolted connection.

CARBER has a supply of hydraulic tensioners and hydraulic torque wrenches necessary to preload standard size bolts and studs. .

CARBER also employs the use of ultrasonic extensometers to measure bolt preload. These units provide an on-site printed evaluation of each bolt in a flange. The ultrasonic extensometer print-out identifies load, stress, and elongation. This information can later be downloaded electronically for permanent records.