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Section U - Uni-Flange Pipe Restraints and Adapter Flanges

UFA400 for Steel Pipe

UFA400 for Ductile Iron Pipe

UFA900 for PVC Pipe

1300 Restraint Device for PVC Pipe

1350 Pipe Restraint for PVC Bell Joints

1360 Pipe Restraint for PVC Pressure Fittings

1390 Pipe Restraint for PVC Pipe Bell Joints

Casing Spacers

1400 Retainer Gland for Ductile Iron Pipe

1450 Wedge Action Restrainer

1500 Joint Restrainer for PVC Pipelines

SO-EZ Gasket for MJ Connections

Uni-Flange Pipe Restraints and Adapter Flanges

Uni-Flange Adapter Flanges

The design of the Uni-Flange Adapter is really quite simple. We took the best feature of three different products and combined them into one fitting.

The FLANGE is made of ductile iron; tougher and stronger than the conventional gray iron threaded flange. Impact resistant, the flange also resists breakage when bolts are over-tightened.

The GASKET is the standard AWWA mechanical joint gasket which has been in use over 50 years.

The RESTRAINT is provided by a set screw locking device similar to that used in mechanical joint retainer glands. This principle has been in use throughout the world, in lieu of concrete thrust blocks and other restraining devices, for more than 50 years.

Uni-Flange Joint Restraints

Mechanical joint restraint was originally designed for use in earth quake prone areas. Uni-Flange restraints not only guard against this problem, but they provide quick, reliable, money saving joint restraint on ductile iron, PVC, and steel pipes in any condition. In the last 20 years mechanical restraint has become very popular.

Restrained Casing Spacers

The Ford Restrained Casing Spacers, in 4" through 24" pipe sizes, offer several advantages over conventional methods of positioning carrier pipes within casings under roadways, railroads, bridges, and canals.

The only casing spacer to combine axial joint restraint (thrust restraint preventing pipeline separation) with casing spacer performance. It is two products in one.

Uni-Flange Series 1400

The Series 1400 is a mechanical joint restraining gland, incorporating individually actuated wedges located around the circumference of the pipe. When the specially designed wedge actuating screws are tightened, the teeth on the bottom of each wedge lock onto the pipe surface. Under normal operating conditions, this is all the restraint that is required. If external forces cause the pipe to move, the wedge teeth remain locked on the pipe and the wedge moves against the actuating screw, enclosed in its ductile iron pocket. This feature allows the joint to prevent separation yet remain resilient and flexible after assembly. In high pressure applications, or when surge pressures occur, the 1400 uses the line pressure to increase its restraining grip on the pipe. If the pressure decreases, the wedge returns to its original position and controlled expansion and flexibility are available again.

Uni-Flange Series 1450

The 1450 consists of a Series 1400 wedge action retainer gland installed on the pipe spigot, connected with high strength, low alloy rods to a ductile iron backup ring that seats behind the pipe bell. It offers the following advantages:
Fast, economical restraint of push-on pipe bells. There is no need for special (and expensive) "factory restrained joint" pipe.

High pressure capabilities. Rated at 350 psi in 4" through 16" sizes, 250 psi in 18" through 36" sizes. Minimum 2:1 safety factor at full rated pressure.

Recommended for any thickness class or pressure class of ductile iron pipe. The contoured wedges of the 1400 component fit the pipe properly. They spread the restraining force around the circumference of the pipe and maximize performance. There is no point loading of the pipe.

Uni-Flange Series 1500

The Series 1500 is a mechanical joint restraining gland. It performs two functions during installation; gasket sealing and thrust restraint.

The Series 1500 incorporates a series of ductile iron restraint segments that fit in pockets around the inner surface of the specially designed gland housing. These segments are contoured to fit each pipe size exactly and have integrally cast restraint edges along their bottom surface. After the seal is made, the "Auto-Tork" segment actuating screws are tightened. This locks the restraint segments onto the pipe surface, providing complete and total thrust restraint for the joint.

The restraint segments of the 1500 are the key to the design. They spread the restraining force, offering full circle contact and support of the pipe. This is important with PVC pipe, especially for thinner wall classes. The restraint segments are designed with a "slot" at the top, which accepts the channeled foot of the activating bolt, so they cannot fall out of their pockets. The Series 1500 meets or exceeds the capabilities of "Factory Restrained Joint Pipe" at a fraction of the cost.