• Span Chem Technologies

Hydro Jetting And Hydro Milling

Span Chem Technologies offers Hydro Jetting And Hydro Milling. They specialize in providing hydro jetting services using high pressure jetting units to supplement their chemical cleaning services. Hydro milling has been widely used in industrial cleaning and pre-commissioning applications for the removal of hard deposits from steam, lube oil, compressor, and process line systems, as well as tube bundles and vessels. It is recommended especially in the case of large diameter piping (>24") offering significant savings in utilities and waste disposal as compared to chemical cleaning. In order to help preserve the long-term integrity of these process piping systems, hydro-milling can be used to remove all undesirable foreign contaminants and particulate matter. The nozzle head, fixed on the end of the high pressure hose is static, the entire length of HP hose itself is then rotated using a Rotating Hose Device (RDR unit). The RDR unit is either hydraulically operated or pneumatically operating rotary device. The RDR unit (a wheeled rotary joint) sits externally from the pipe being cleaned, in such a manner that the rotary device can travel the cleaning distances with the rotating hose length which is inserted into the pipeline opening. The high pressure swivel installed on the RDR unit allows rotational speeds from as low as 10 rpm up to 300rpm thus cleaning the internal pipe wall in its circumference. The High pressure nozzle head and water jets are specially configured to ensure the nozzle stand-off distance from the pipe internal wall surfaces is kept constant, and the hose rotational speed is set to ensure the optimum water jet dwell time is achieved to clean the hardest scales and debris requiring removal from the pipe surface.