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The correct lubricant for threaded joints is essential for precise preload and reliable sealing of the flange connection. We offer lubricants with measured coefficients of friction and their professional application.
Measured coefficients of friction according to EN 16047
Suitable for the most demanding applications
Calculation of tightening torque
Uneven tightening of a flange connection is one of the most common causes of leaks and can occur even when the installer has adhered to the specified torque for each bolt.
The joint does not seal, the coefficient of friction changes with load, different pre-tensioning in the bolts even with the same torque. The sealing is then not evenly compressed around the entire circumference and the joint does not seal.
Measured and stable coefficient of friction that does not change with increasing load. Only then does the calculation of the tightening torque make sense, and the assembly yields a predictable result.
We have developed our own lubrication system for critical flange joints. All lubricants have measured coefficients of friction according to ČSN EN ISO 16047 and are part of the torque calculations that we process for our customers.
POWERtorque LF kote 450 is a hot cured lubricant. It minimizes the coefficient of friction and prevents seizing.
Homogeneous, easy spreading assembly paste suitable for lubricating any type of threads. It is suitable for any combination of thread materials for bolt and nut connections.
POWERtorque LF Booster achieves the required preload with a tightening torque up to 61% lower compared to a dry thread and significantly lower than conventional lubricants on the market. A complete analysis comparison is available upon request.
Comparison of tightening torques required to achieve a preload of 150 kN on a bolt M30 x 3.5 mm, material 8.8:
Our solutions help increase the reliability of our clients' operations.
On our blog, you will find case studies from the chemical industry, energy sector, and other fields.
View case studiesThe customer needed to tighten 126 flanges in an area where the use of large torque wrenches was not possible. The specified torque of 460 Nm was physically impossible to apply with the available tools.
Operating parameters: Temperature 600 °C, pressure 39 bar, medium H2 and steam, bolts M33 x 240 mm.
Our solution: We designed a lubrication system combining the surface treatment of the threads of the bolts, faces of nuts, and washers with POWERtorque LF Kote 450 and the assembly lubricant POWERtorque LF Booster. Due to demonstrably lower coefficients of friction, the tightening torque was recalculated.
The customer was able to carry out the entire assembly with their own staff using standard tools. Read more in our article.
We would be happy to provide a non-binding technical consultation.
It depends on the product. The POWERtorque LF Booster and Depac 505 can be applied by the customer themselves during installation. The application of POWERtorque LF Kote 450 cannot be done independently - it requires special equipment and a technological process, which we provide at our facility.
Yes. We perform the LF Kote 450 application on both the fasteners supplied by us and those supplied by the customer - screws, washers, and nut faces.
In most cases, this is not specified in the drawing documentation, and that is exactly the problem. If you do not know which lubricant the torque was calculated for, or if the documentation does not specify the lubricant, please contact us. We will calculate the tightening torque for the specific lubricant and joint.
Yes. POWERtorque LF Kote 450 is particularly suitable for stainless steel fasteners, where the risk of thread galling is the highest.
What is included in a comprehensive solution for flange joint sealing?
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