Coupling production

DFHB Couplings are produced using a winding process. To achieve the same quality standard as the pipes, they incorporate a full width EPDM seal (gasket). The couplings are manufactured on a computerized machine, which first places the prefabricated EPDM gasket on a steel mold and then winds glass roving pre-saturated in polyester resin round it.

At the same time cut roving is sprinkled on to the coupling to reinforce the axial direction. After the laminate is in place, the resin is polymerized by applying heat.

Fitting Production

The pipe fittings are manufactured in segments and the individual parts assembled with laminate. Laminate is primarily used to ensure leak-tightness and fitting stability. The joints are also sealed over the entire surface for the same reason. After the joints and surfaces are primed, laminate is applied in a manual, fiber, spray or winding process.

Fittings manufactured in this way achieve a short-term ring stiffness of at least SN 10,000. In addition to standard DFHB fittings, cost-effective customized models can also be produced.