Lokring™

Pipe connections without welding

about the lokring

Lokring™: Pipe connections without welding

Lokring™ is a revolutionairy cold-connection technology joining two pieces of pipe without welding.

Lokring™ is approved for use for industry design codes (ASMEB31.1, 31.3, EN13480 and RToD). In addition, Lokring may be used with piping systems under the Pressure Equipment Directive (PED) up to and including category 3.

How does it work?

Hydraulic tools will compress the fittings over the pipes to be connected. This creates a helium-tight, permanent metal-to-metal seal, equivalent to a welded connection.

This is what makes the Lokring™ a unique solution

  • Lokring also works on internally contaminated pipes
  • Eliminates hot work
  • Optimizes safety
  • Saves time and costs
  • NDT inspections no longer unnecessary.

Instruction cards Lokring

MTK45 MTK60 MTK100/300 MTK400

Lokring FAQ

Want to know more about us or our products and services? On the right you will find frequently asked questions and answers. If you would like more information, we are happy to answer any questions. Why not get in touch.

Does the PED (the European regulations for pressure equipment) allow Lokring to be used?

PED stands for the Pressure Equipment Directive. Lokring may be used under the PED for piping up to and including Category 3.

 We have the requisite documentation to make this possible from the largest conformity assessment body in the Netherlands. Contact us for more information on Technom’s assurance work for this on the European market.

Has Lokring been approved by the NL-CBI? (Conformity assessment body, formerly a ‘notified body’.)
The dutch notified body wil never officially approve a technique. As indeptendent third party this organisation will verify the necessary documentation. Please contact us for more information.
As piping engineers, we have been using Lokring successfully for several years now. Can you help us define how it is used in a ‘best practice’ document?
We have developed a template with input from some important ‘best practices’. We will be happy to use this to help you develop further.
Do you have to be certified to install Lokring fittings?
Yes. We can provide training in-house (at Zeist, NL) or at your location. Please contact us to discuss the possibilities.
Buying a fitting seems more expensive to us than welding. Why should I use Lokring?

Key phrase: total cost of installation.

The direct costs of a weld (wages, use of equipment, added material, etc.) may well be lower. The other costs (largely related to technical safety procedures and precautions) will in practice mean that a weld is in fact more expensive. These costs are often only visible to the end user (the factory owner). Consider:

  • The cost of employing a fire watchman;
  • The costs and throughput time for carrying out NDT (X-ray photos);
  • The risk of overrun in the planning;
  • The throughput time (planning) is once again crucial in a turnaround. Please contact us if you want to see the supporting documents with time studies.
Help! Can Lokring help me carry out repairs to pipes in ATEX zones 0, 1 and 2?
Lokring is a non-welded connecting technique, i.e. it is not ‘hot’ work. Because no sparks or naked flames are involved, Lokring may be fitted using a cold work permit while the factory is running.

contact us

You can always reach us: we are available day and night for customers and prospects. Every day of the year. Do you have a question? Please, leave your details and we will be in touch soon!