The BiDi process is an automatic, precise operation. The Bidirectional pipe machine is controlled by Vision 3 automation, a solid-state electronic control system requiring no machine operator. The result is a high output of consistently superior quality pipe. The automatic process further ensures accurate dimensions on joints and trouble-free joint performance.
The BiDi® process produces steel reinforced concrete pipe suitable for traditional thin wall pipe markets. The proven roller-compacted process achieves high concrete compaction through use of a unique computer-controlled counter-rotating rollerhead and trowel. The action of the assembly eliminates torsional stresses in the green pipe and finishes internal bores to an exceptional standard. This ensures the finished product will meet worldwide thin wall pipe specifications including those from Australia, New Zealand and Japan. The BiDi process utilizes a low water/cement ratio concrete to produce pipe with high strength, low permeability and excellent abrasion resistance.
A proven production innovation is the use of patented form-mounted pneumatic cage positioners for proper placement of the steel reinforcing. Use of the cage positioners improves hydrostatic testing and overall pipe durability while eliminating the need for plastic and/or steel spacers to locate the cage. Thin wall pipe produced by the BiDi process have successfully passed all required D-load (external load) and hydrostatic tests, with absorption typically testing at 3-4 percent.