Comparison of Arvick Method and Traditional Methods

 

To achieve the highest quality connection, Arvick uses a combination of advanced connection methods supported with ultrasonic bolt measurements. With this combination we are able to keep the average amount of load within 5% of the target load, with a 10% maximum spread. Because of this minimal spread load the strength and durability of the connection is greatly increased.

When applying the Arvick Method, data is gathered and directly converted into reports, giving a completely transparent system. All the information provided in the report is 100% traceable and can be proven by measurement data when necessary. This is an Arvick standard which aims at giving the client insight into the quality of the connection.

The Arvick Method reduces the Total Cost of Ownership. We achieve this with periodic checks throughout the whole lifecycle, giving insight into the current condition of bolts and integrity of the connection. The inspections are very short in duration compared to the inspections where every bolt is re-tightened. In this way actions can be taken before abnormalities become a hazard, what ensures the best possible connection.

We deliver a complete package consisting of a good quality connection, support and consulting throughout the whole project, specialized tools, as well as reports with traceable data presenting the quality of each connection.

 

Torque Conventional Method

In conventional method torque proceeds according to protocol in three stages using a four quadrant protocol:

  • 40%
  • 80%
  • 100%

 

Turn of Nut

Turn of nut is performed by rotating the nut or bolt of a fastener assembly a specific turn angle, based on the fastener’s length and diameter, while restraining the unturned element from rotating.

 

Spread

Spread is caused by crosstalk, variations in bolts and used protocols. Flange is tightened by a well-trained operator.

 

Disadvantages of torque conventional method and turn of nut:

  • Risk of bolt failure
  • Oversized components
  • No proof of the work being done correctly

 

Arvick Method represents a new way of thinking and working

According to the Arvick Method spread is within 10% and is always within 5% of the target load. The actual data is stored and can be used to do periodic checks.

 

Benefits of Arvick Method

 

Increased bolting connection accuracy

  • Bolt load spread within 10%
  • Average load within 5% of the target load
  • Reduced risk of bolted joint failure

Completely transparent system

  • 100% traceability of data
  • Load can be confirmed with the bolt measurement data
  • Complete documentation as a standard

Reduced Total Cost of Ownership

  • Bolt inspection across the system lifecycle
  • Minimized duration of inspections
  • Improved integrity of the connection