Straub Open Flex Couplings Truco distributes the full range of Open Flex couplings from leading manufacturer Straub. These are hinged and unhinged axially flexible pipe couplings for the repair of pipes of all materials. The range also includes a wide pipe coupling for the restoration and repair of metal pipes in the upper pressure and diameter range. These couplings are suitable for all qualities of water, wastewater, air, fuel, chemicals and solid materials. Straub pipe couplings are designed and constructed according to the DIN 86128-1 and 86128-2 directives: Diameter: 48.3 to 4 064 mm Wrap-around design for easy access Reusable For pipes with anchor points EPDM and NBR sealing sleeves used as standard Temp. range (FPM/FKM sealing sleeves): -20° to 180° C