Ductile iron pipe and fitting with restrained joint system (R.J. Pipe)
R.J. joint system is the first generation of restrained joint. It is an advance design of Push-on flexible restrained joint whose it`s locking system prevents from pipe slip-out while earthquake or subsidence. Therefore, these types of pipes are known as earthquake restrained joint. One of the main specification of this kind of joint is ease of assembly and disassembly without bolt and nut
Results of performance tests based on ISO 16134 for R.J joint system has following technical specifications:
Applications:
- Suitable for earthquake regions and unstable soils, without concrete thrust blocks in the joint place
- Suitable for trenchless application systems
- Suitable for bridge, highway and railroad crossing
Advantages:
- Suitable axial displacement and angular deflection with perfect sealing
- Easy and fast installation without nut and bolt
- High resistance against hydraulic forces
Available coatings and linings:
- Coatings:
- Metallic Zinc (Zn) or Zinc-Aluminium (Zn-15%Al)
- Black Bituminous, Blue or Red Epoxy Paint
- Linings:
- Portland cement mortar (Anti-sulphate)
- Blast furnace slag cement mortar
- High Alumina cement mortar