Product description
A restrained push-in ductile iron pipe system designed to prevent joint separation during ground movement, settlement, hydraulic loading and seismic activity.

Key features

Restrained push-in joint
Prevents pipe separation
Distributes axial forces along the pipeline
Allows controlled angular movement
Allows controlled longitudinal movement
Maintains sealing during displacement
No conventional bolts or nuts required for the standard joint
Fast assembly and disassembly
High resistance to hydraulic forces
Helps reduce water loss
Suitable for unstable, weak or seismic ground conditions

Maximum angular deflection

DN 80–300: 4°
DN 350–700: 3°

Standards stated in the catalogue

Seismic design: ISO 16134
Functional testing: ISO 10804
External coating: ISO 8179
Internal lining: ISO 4179 and EN 598
Pipe manufacture: ISO 2531
Rubber sealing system associated with Tyton-type joints

R.J. Pipe locking-ring welding procedure

When a pipe is cut during installation or supplied without a welded locking ring, the catalogue provides the following welding specification:

Welding process: Shielded Metal Arc Welding — SMAW
Joint type: single weld
Base metal: SG cast iron
Material standard: EN-GJS400-15
Base-metal thickness: 5–12 mm
Electrode type: ENiFe-CI
Electrode standard: ANSI/AWS A5.15
Electrode diameter: 3.25 mm
Current polarity: DCEP
Welding current: 75–100 A
Welding voltage: 22–24 V
Welding position: horizontal
Welding speed shown in the catalogue: 3–6 m/s

The welding values above are reproduced as stated in the supplied catalogue page.

R.J. Pipe — Seismic-Resistant Restrained Joint Pipe

R.J. Pipe locking-ring welding procedure