Internally Rifled Boiler tube are tube with internal diameter with spiral ribs made from cold drawn process. Multi rifled tube are used to evaporate water into steam in Thermal Power plant application. Internal rid shape helps higher heat transfer at higher steam quality level. Multi rifle tube are only supplied in cold drawn form in fix length as per the client requirement. Though rifle tube are much expensive the normal tube , but output and result turn out to profit at end.
From Rifled tube, Better heat transfer at lower mass flux levels. Rifle tube are used to transfer head of fluid before reaching the boiler.
Rifled tube is used in high pressure boiler and Power plants in CDS form. Rifled tubes in a conventional boiler provide a larger margin of safety for natural circulation and assisted circulation and many economic advantages. Rifled tube improves boiler efficiency. Multi Rifled tubes are also used in heat exchangers to provide highly energy efficient means of heat transfer.
Advantage of Multi Rifled Cold Drawn seamless pipe is as below:
- Improved heat transfer rate even at higher steam quality levels
- Very good heat transfer even at low mass flux levels
- Reduction in mean metal temperature of the tube wall
- Ability to increase heat transfer rate by optimizing rifling geometry