The Lede Model 1100 ring joint coupling provides a An ideal pipe joining method where pipe is difficult to much more secure joint than a comparable roll-grooved groove or when welding is not the preferred joining system, simply because the contact area of the rings is method much greater than that of the roll groove profile. In addition the welded rings are able to withstand 2-3 times

The processing of a roll groove on pipe becomes more the shearing forces of roll grooves. difficult as the pipe O.D. and or wall thickness increases. Roll grooving pipe large than 14’’ (350mm) can be difficult and requires the proper tools and equipment. Pipe having a wall thickness greater than 0.375’’ (9.5mm) may not be practical to roll groove. In such cases the Lede ring joint piping system offers an excellent alternative.

Ring welding requires only a structural weld, which, unlike pipe to pipe direct welding or flange welding, does not directly affect the sealing capability of the joint, thus eliminating the need to inspect the weld for leaks.

The Lede ring joint coupling is classified as a Type II Class 1 mechanical coupling of ASTM F1476 and also meets or exceeds the design and performance requirements of AWWA C606.

Applicable to plain-end and or beveled-end pipe

First weld a factory-supplied ring on each pipe end. Next

mount the rubber gasket over the pipe ends and place the The weld rings provide much better pressure restraint coupling segments over the gasket and fasten the bolts and than that of a roll-grooved joint 24 bars/350 psi nuts. The same C-shaped style gasket as used in the working pressure for 350mm to 600mm/14’’ to 24’’ grooved system effectively seals the pipe ends. Rings can be Factory supplied weld rings are much more economical welded in the fabrication shop or in the field and the than type A, B, C, D, E or G shoulder rings

coupling housings can be installed on the job site.

No inside protrusion or flare at the pipe end as is oGen

seen in a roll-grooved joint

The wide housing segments assembled with two bolts and nuts at each segment provide a positive grip of the pipe.