Mild steel drums for lubricating oil

1938 ◽  
Keyword(s):  
Mild Steel ◽  
Lubricating Oil ◽  
Steel Drums

Effects of Selected Media on Corrosion Behaviour of Mild Steel

2009 ◽  
Vol 62-64 ◽  
pp. 305-310
Author(s):  
B. Kareem
Keyword(s):  
Sodium Chloride ◽  
Mild Steel ◽  
Corrosion Behaviour ◽  
Low Carbon Steel ◽  
Lubricating Oil ◽  
Distilled Water ◽  
Low Carbon ◽  
Atmospheric Air ◽  
Test Pieces

In this study, investigations were carried out on the corrosion behaviour of low carbon steel (mild steel) in the selected media which are cassava extracts, sodium chloride solution (brine), lubricating oil, distilled water and atmospheric air. The test pieces, after chemical analysis were machined to similar dimensions. Each of the specimens was immersed into equal volumes of the selected media except one for the atmospheric air which was placed in the open air. The weight and hardness measurements were carried out every five days for a period of twenty-five days and loss in weight and hardness of the specimens were determined in succession. The results obtained showed that mild steel was more susceptible to corrosion in cassava extracts, sodium chloride and distilled water, than in lubricating oil and atmospheric air. Follow up statistical test results showed that loss in weight is significant for cassava extracts when compared with other media.

Expanded Tube Joints in Boiler Drums with Special Reference to the Battersea High-Pressure Boilers

1946 ◽  
Vol 154 (1) ◽  
pp. 52-93 ◽  
Author(s):  
W. B. Shannon ◽  
C. W. Pratt ◽  
T. B. Webb ◽  
W. B. Carlson
Keyword(s):  
High Pressure ◽  
Mild Steel ◽  
Historical Review ◽  
Operating Conditions ◽  
Original Design ◽  
Experimental Development ◽  
Holding Power ◽  
Steel Tubing ◽  
The Subject ◽  
Steel Drums

Particulars are given of the major pressure parts of two high-pressure boilers installed at Battersea Power Station, each comprising four alloy steel drums and their interconnecting mild steel tubing. Their design and working conditions are described, and a historical review is presented of their erection and of problems which arose whilst rendering the expanded tube joints leakproof. The gradual resolution of these problems is then traced through several stages. It was realized that the leakage was fundamentally due to the elastic strain which occurs in the tube holes of highly stressed drums, which, at Battersea, amounts to about twice that pertaining to mild steel drums. The holding power of the joint is thus relaxed to an abnormal extent, sufficient to permit leakage. The elastic deflexions, or total “spring” of the joint, resulting from the expanding operation, must therefore be correspondingly increased to accommodate the increased drum strain. Various suggested methods of achieving this are reviewed. Insertion ferrules were selected as the most promising, and experimental development tests to investigate its possibilities are described. A full-scale rehearsal of the method carried out on one of the steam receivers is recorded, and this is followed by a description of the final ferruling and testing of both boilers. A number of general observations and conclusions are given, and the subject of leakage and its causes is discussed in some detail. It is concluded that full advantage can be taken of the benefits which result from the use of high-tensile steel boiler drums, with mild steel tubes expanded into the drums. It is, however, essential that in the design stages the expected operating conditions of the expanded joints should be investigated on the lines suggested in this paper. The adoption of high-tensile steel ferrules as a feature of original design is justified by the results obtained at Battersea.

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