Cheng Fluid Systems, Inc. products meet welding requirements as defined by ASME Standards, "Process Piping" fabrication per ASME B31.1, B31.3, and other required standards. Our design, manufacturing and calibration systems, processes and facilities meet the system requirements defined by strict quality management standards to form our flow conditioning products.
Our talented group of welders, fabricators, and machinists coupled with our other services and our attention to detail give us the ability to pursue a wide variety of ASME Code work.
The CRV® is supplied as a pipe stub with internal welded vanes. The pipe stub is prepared with beveled ends for butt welding; Flanges are optional. The CRV® should be flanged or welded into the piping system, at (and no more than one pipe diameter away from) the inlet side of the last elbow before the pump’s suction nozzle. The CRV® should be positioned in the piping system so that the flow arrow on the CRV®s name tag points in the same direction as the flow in the piping system. Standard welding practices can be used in welding the CRV® into the piping system.
Internal vanes are welded according to ASME section IX. Vanes to housing are continuous, full penetration welds. Vanes to center junction are continuous, fillet welds. Weld examination done on vane to housing welds by dye penetrant test. Charpy test, hydro test, x-ray weld examination and other test can be done per customer request.
There are no moving parts in a CRV®, therefore no spare parts are required, and no maintenance of the CRV® is needed.
Cheng Fluid Systems, Inc. is assessed and certified based on demonstrated ability to meet the requirements of an ASME standard and continue to provide a vital service to enhancement of public safety and facilitation of international commerce.
