Certifications
The screw connections from Schwer Fittings are certified by the certification body DNV·GL (Det Norske Veritas · Germanischer Lloyd). The very extensive type test included the following tests: combined pressure pulse and vibration test, repeat assembly test, leak test, vacuum test, pull-out test and a bursting pressure test.
Focus on details
The rear wedge ring has a very high surface hardness of up to HV 1,000. The inner cone in the socket is rolled smooth and the surface is compacted, Ra 0.4 max. The external threads are rolled/chased. The silver-plated internal threads of the union nut prevent cold welding and can therefore be easily removed.
Own European production
The u2-Lok fittings are manufactured in our own production facilities in Europe. Most of the semi-finished products come from EU countries. Both the quality assurance and the ongoing pressure tests are carried out exclusively at the company headquarters of Schwer Fittings in Denkingen. Pressure test requirements according to customer specifications are carried out and documented at Schwer. A test number is generally lasered into the media-carrying parts including the rings. This number hides a lot of information. In this way, the assignment to the starting material with all mechanical tests and the assignment with a 3.1 certificate can be guaranteed even after years. It is also possible to trace back when, in which production plant, on which machine and by which employee the parts were manufactured.