ASTM B111 C70600 O61 L Low Fin Tube Heat Exchanger Condenser Evaporator Oil Gas

ASTM B111 C70600 O61 Low Fin Tube Heat Exchanger Condenser Evaporator Oil Gas

What is ASTM B111 Finned Tube?

The structure parameters are mainly the inner diameter and outer diameter of the finned tube, the wall thickness of the finned tube, the fin pitch, the thickness of the fins and the height of the fins.
The low finned tube mainly relies on the ribbing outside the tube (ribbing coefficient of 2~3) to expand the heat transfer area, which has a larger surface area compared to the bare tube with the same consumption of metal materials. The ribbing can make the heat transfer surface peel off the flow layer and improve the heat transfer effect by increasing the heat transfer surface disturbance, which strengthens the heat transfer for the second time. The main factors that affect the reinforced heat transfer on the ribbed surface are the fin height, fin thickness, fin spacing and thermal conductivity of the fin material. In addition, since one side of the heat transfer wall is extended into the finned surface, the convective heat transfer on the smooth side and the thermal conductivity of the base wall have certain effects on its total heat transfer. The fin spacing size of the low finned tube needs to be determined according to the surface tension of the liquid and the shear force on the liquid film generated by the flow .
The practical application proves that the low finned tube also has excellent fouling resistance because fouling tends to form parallel pieces of scale along the edge of the crest, and the tube expands and contracts with temperature changes during operation. On a bare tube, the fouling will form a cylinder on the tube wall and there is no natural mechanism to prevent fouling. Due to the lower fins, the cleaning method and difficulty of the low finned tube is exactly the same as that of the light tube. In addition, the low finned tube is made of ordinary light tube as a blank, by simple rolling processing, its mechanical strength and corrosion resistance is no less than the original light tube billet, can fully guarantee the long-term reliable work of heat exchangers.

Chemical Composition OF ASTM B111 C70600 O61​

Mechanical Propertie OF ASTM B111 C70600 O61​

Physical Properties OF ASME SA249 TP304

Material Grade

Tensile Requirements

Application:

Heat exchanger

Condenser

Evaporator

Oil Gas