Large-Bore Lay Flat Hose Coupling, Grooved End

A large-bore coupling that turns the end of a lay flat hose into a grooved pipe end, so the hose connects to grooved steel or HDPE pipe, pumps, valves and manifolds with a standard grooved clamp. It is the usual way to join 8" to 16" dewatering, frac water and transfer lines, where threaded couplings are too heavy and slow.

Construction

• Hose shank: forged, for strength at large bores
• Clamp: re-attachable bolted halves, so the coupling can be refitted to a new hose end
• Finish: hard anodised for wear and corrosion protection (aluminium)
• Materials: aluminium or stainless steel
• Sizes: DN100 to DN400 (4" to 16")

Applications

• Mine and construction dewatering lines
• Frac water and temporary transfer pipelines
• Agricultural and municipal large-bore water transfer

Fitting large-bore lay flat couplings

• Cut the hose square and push it fully onto the shank before closing the clamp halves.
• Tighten the clamp bolts evenly, side to side, to the torque given for the size; re-check after the first pressurisation.
• Match the coupling to the hose: lay flat wall thickness varies by class, and a clamp sized for one wall will not hold another.
• Check the working pressure of both the hose and the coupling — the line is limited by the lower of the two.
• Inspect shanks, clamps and seals for damage before each deployment, and keep seals clean of grit.

How to order

Send the hose bore and type, the mating connection at the other end (Storz size, grooved pipe OD, flange standard and rating, or the mating half) and the working pressure. We supply couplings loose or fitted to the hose as assemblies. Price and lead time are confirmed with the quotation.