Ensure a more reliable operation of wind turbines

Achieving the correct bolt pretension is essential in assuring bolted joint integrity. Bolted joints are critical when ensuring safe operation of wind turbines or other similar bolted connections.

Bolt-Check is an ultrasonic measurement system which can reduce installation & service costs as well as minimise the risk of failure and downtime of the turbines.

Bolt-Check can be used when installing new bolts and when evaluating existing bolts as part of the determining the lifespan of wind turbines. Furthermore, as a part of the process, a unique Bolt-Tag is added to bolt. The tag gives you full traceability of your bolts, enabling you to locate each bolt as well as schedule service and maintenance.

In the past, it has been difficult to evaluate bolted joints, since the previous methods of inspection only focused on whether the bolts were loose or rusty. However, most joint failures are not caused by the design of the joint or fastener. Often, they are the result of insufficient or inconsistent clamp load when assembling the joint.

Problems such as bolt fatigue and vibration loosening can usually be prevented by achieving and maintaining a correct clamp force in the joint. Achieving a consistent clamp force in the bolted joint during assembly is essential for bolted joint integrity.

Bolt-Check can help you prevent these issues. The system is based on ultrasonic measurement which is a very accurate solution seeing that it allows you to track the clamp load during the entire tightening process and determine the clamp load without influencing the joint stiffness.

The tool is suitable for most bolt types and requires no special pre-treatment of the bolts.

The advantages include:

  • Full traceability (eliminate process risk)
  • Posssible to track data and hosting of data which enables business intelligence
  • A cost-effective solution
  • Reduce number of service inspections (no re-tightening)
  • Minimise the risk of failure
  • Improve utilisation of bolts
  • Maximise the operation time of the wind turbine
  • How it works

    Bolt-Check products

    Discover our products and services for the measurement of bolted joints

    01

    Bolt-Check Lite

    A stand-alone system for measurement of new bolted joints.
    The system can be operated by one hand and is accessible as well as a reliable method.

    02

    Bolt-Check Basic

    A stand-alone system for measurement of new bolted joints.
    The benefits of the system include improved performance and display.
    It is possible to upgrade the system to Bolt-Check standard.

    03

    Bolt-Check Standard + Manager

    The Bolt-Check Standard can be used when installing new bolts and includes a Bolt-Tag system.
    The system includes storing and tracking of data on the individual bolt. This enables you to schedule service and maintenance.
    The benefits of the system include improved performance, full traceability and hosting of data.

    The system enables business intelligence.

    04

    Bolt-Check Advanced & Manager

    The service is provided by R&D.
    Bolt-Check Advanced is a non-destructive measurement of the clamping force of existing bolts and excludes a Bolt-Tag system.
    The benefits of the system include improved performance, full traceability and hosting of data which enable you to schedule service and maintenance.

    The system enables business intelligence.

    DNV verification of Bolt-Check

    Watch the video as our Business Unit Director Søren Kellenberger reveals information about the DNV verification of Bolt-Check and how it can minimise the risk of failure as well as maximise the reliability of the wind turbine.

    How to achieve the correct bolt pretension

    Watch the video and get a glimpse of how you can achieve the correct pretension by using Bolt-Check

    Process overview: Measurement of existing bolts

    Unique ID bolt tag
    Unique ID bolt tag
    Advanced measurement
    Advanced measurement
    Create bolt data
    Create bolt data
    Upload to database
    Upload to database
    Standard measurement procedure
    Standard measurement procedure

    Process overview: Measurement of new bolts

    Unique ID bolt tag
    Unique ID bolt tag
    Standard measurement
    Standard measurement
    Create bolt data
    Create bolt data
    Upload to database
    Upload to database

    How can we help you?

    Contact persons
    R&D Contact Søren
    Søren Kellenberger
    Business Unit Director / Head of Sales - Global
    R&D Contact Flemming
    Flemming Nielsen
    Senior Project Engineer - Bolt & Measurement Inquiries
    Send us a message