Tower
Flanges
Restore tower section flange flatness on-site. No re-fabrication, no transport.
Support structures and flanges
Tower
How It Works Tower flanges.
Tower flanges.
Machined where they stand.
Out-of-spec tower flanges drive uneven preload and fatigue cracking. Rather than scrapping the section or shipping it back to the foundry, our portable machining systems restore flatness in-place - whether the section is at the staging yard, on the quay, or already erected.
Technical Specifications
Typical duration 1–5 days on site
Diameter range Up to Ø10,000 mm
Flatness tolerance OEM specification
Certification ISO 9001
Equipment Mobile CNC flange milling system
Applications Tower sections
Expected lifetime Similar to original
ISO 9001HIGH PRECISIONOEM TOLERANCESONSITE MACHINING
Reduced Lifecycle costs Improved flange flatness helps reduce bolt-related maintenance, corrective actions, and long-term operational costs.
HSE Advantages If combined with precise bolt tensioning methods, the precise flange tolerances achieved with Goliath can help reduce the need to retighten bolts and eventually lead to maintenance free connections – reducing OpEx and improving Health, Safety and Environment (HSE).
Repeatable Manufacturing Quality Fully CNC-controlled machining replaces manual correction methods with a predictable and repeatable production process.
Built for Offshore Scale Goliath machines monopile and transition piece flanges up to 12 metres in diameter, supporting the increasing size and complexity of offshore wind structures.
How it works
Our process
01
Quotation
We offer follow-up meetings with the customer. CNC Onsite’s follow-up program is part of our high quality standards.
02
Planning
We plan the technical part of the project, which includes preparation and programming of Goliath, the precision machine that will perform the milling. We plan staff availability and timing, including flexibility to accommodate potential changes to the schedule.
03
Implementation
Our technicians will conduct the precision milling of the flanges at the customer’s factory. Alternatively, CNC Onsite will train the customer’s own technicians for the operation of the machine. The team will use the Goliath machine to mill the flange faces, leaving them flat to within one millimeter.
04
Handover
After machining measurements are made, a measurement report is issued to the customer. Alternatively, the customer or a customer-contracted third party conduct the measurements. Once the measurement are complete, the customer signs off the work.
05
Follow-up
We offer follow-up meetings with the customer. CNC Onsite’s follow-up program is part of our high quality standards.
Talk to our team Get expert advice
Get expert advice
on your project.
Send us your damage report or turbine type and we will respond within one working day with an assessment and indicative quote.
