Topic
Bolted Joint Integrity
The challenge
Bolted connections are a common failure point. Too little preload leads to high contact resistance and overheating; too much preload damages the material or leads to creep.
Our approach
Nexums assesses the integrity of bolted connections: bolt selection, torque, preload and assembly sequence. We advise on the correct specifications and review the substantiation thereof.
Standards framework
IEC 62271 · ISO 898-1/-2
Result
A substantiated advisory on torque values and assembly requirements that keep contact resistance low and the connection stable.
FAQ
What does a bolted joint integrity assessment involve?
An assessment of bolt selection, tightening torque, preload and assembly sequence of bolted connections, assessed against IEC 62271 and ISO 898.
Why is preload so important?
Too low a preload causes high contact resistance and overheating; too high a preload damages the material or leads to creep. Both shorten the service life of the connection.
Can Nexums review existing assembly instructions?
Yes. Nexums reviews existing tightening-torque specifications and assembly procedures and advises where these do not align with the standard or good practice.
Need independent advisory on bolted joint integrity?
Schedule a call