The inner surfaces of the RUSELBORU full-face® GRP couplings are coated completely by EPDM sealing, which maintains a safer joining tightness when compared with similar systems and ensures water-tightness under high pressure.

Since the seal is integrated into the coupling, it does not dislocate and does not require to be installed on the worksite.

Whether they are produced by the continuous filament winding method or centrifugal casting, the pipes with identical nominal diameter have identical outer diameter. Therefore, regardless of the manufacturing method, the same RUSELBORU GRP couplings can be used on pipes with the same nominal diameters.

Angular Deflection on Couplings

Couplings are designed to meet the performance criteria (angular deflection, pressure, external load, and vacuum) of EN 1119, ISO 8639 and ASTM 4161. Angular deflection ratings allowed by the standards are presented in the table below.