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Corrosion Performance Of Welded Steel Tubes

TF Sources Co.,Limited | Updated: Sep 19, 2018

In the case of a T-welded steel pipe containing NI, the corrosion resistance in acidic environment is strong, in the environment containing sulfuric acid or hydrochloric acid, the higher the content of NI in the T-welded steel pipe, the stronger the corrosion resistance. In a general environment, it is possible to prevent erosion by simply adding a CR to the T-welded steel pipe. The poor edge condition of the steel strip is another important cause of the wrong side.

The influence of mass flow rate, heat flux density and structural parameters (helix curvature diameter and ratio of T-welded steel pipe diameter dc/d) on the heat transfer coefficient of saturated bubble boiling in vertical spiral tube. In the production of T-welded steel pipe, the wrong side happens frequently, and its influence factors are many. In the production practice, the pipe is often degraded by the error margin.

Therefore, it is necessary to analyze the causes and preventive measures of the wrong side of the spiral steel pipe. Due to the poor shape and dimensional accuracy of the steel lead tail, it is easy to make the steel strip hard bend and cause the wrong side. Analog parameter range: Vertical pipe: Pipe diameter d=lomm, tube length l=660mm; three vertical T-welded steel tubes: diameter d=10mm, the ratio of curvature diameter and spiral tube diameter of the T-welded steel pipe is dc/d=15,20,25, the helix pitch pt=20mm, hose length respectively l= 503mm,l=660mm,l=817mm. Mass flow g=200~400kg/(M ' 2 s), heat flux q=5~15kw/m ' 2, saturated pressure p, saturated =0.414880mpa, saturated temperature T, saturated =283.15k.

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