Technical standards for steel-lined equipment
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Dear colleagues, our company had a hydrogenation reactor some time ago (with a carbon steel shell and a stainless steel lining). During the regular inspection of this special equipment, it was suspected that the gap between the lining and the shell was too large – the designed thickness of the shell was 70 mm, while that of the lining was 5 mm; however, the actual measured thickness was 85 mm, suggesting that the lining and the shell were not properly fitted together. Are there any relevant manufacturing standards or testing methods regarding the required gap between the lining and the shell?
What is the bonding rate of stainless steel composite panels? nb 47002?
In the case of composite panels, relevant standards specify requirements for the adhesion rate, with different levels having varying adhesion rates. It is guessed that the 85 mentioned by lz refers to a local measurement of the device; it’s likely that some part of the stainless steel has peeled off during use
Lining equipment? How was this thickness of 85 measured?
Depending on the grade of the stainless steel composite sheet, if it is grade B1, the allowable degree of non-adhesion is 0%; for grade B2, it is ≤2%, and for grade B3, it is ≤5%. For hydrogenation reactors, we generally use grade B1, as any degree of non-adhesion is not permitted
Is the stainless steel lining of yours loose? Either explosive lamination or multi-layer nesting
During my first encounter with it, I studied the seam welding process in detail; it seems that this method isn’t suitable for this equipment, as there are gaps between the steel plates, which leads to inaccurate detections