Unique features

DUCCO couplings are general purposes couplings for use with grooved end steel pipes. Simple, quick installation procedure requiring only one spanner, makes for low installation costs. Housing key section positively engages grooves around entire pipe circumference mechanically locking pipe together. Built-in defection tolerances as per individual charts allow quicker installation and easier adjustment of pipe laying where levels vary or settlement occurs.

DUCCO couplings can accept some linear expansion and contraction thereby relieving limited pipeline stresses without costly expansion joints. A union per joint facilitates the removal of pipe sections for replacement, servicing, cleaning etc. In the grooved end pipe, the grooves are not as deep as comparable threaded pipe; less metal is removed therefore pressure rating of pipe is largely retained.

Advantages

 Allows angular deflection-misalignment
 Expansion, contraction no need for expansion joint
Reclaimable, no need for union
Allows fast connection with valves
Allows rotation of pipe to distribute
No special skills required
No welding slags
No weakening of pipe at joints
No fire hazard during installation
Speed of installation
Allows prefabrication
Low installation cost