Regarding the failure of nitrogen production adsorption cylinders
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The DN1600 nitrogen generation adsorption cylinder is designed with a pressure rating of 0.97 Mpa and an operating pressure of 0.85 Mpa; it is made from Q235-B steel. Why did multiple cracks appear at the stress concentration points in the cylinder’s structure after only half a year of use? Is it related to enabling two cold dryers simultaneously with the user in order to keep the operating temperature below 0 degrees? I would appreciate it if colleagues could offer their suggestions to help identify the cause.
The adsorption cylinder shares the same design as its counterparts; it has no fatigue design nor heat treatment, and cracks of that kind do not occur in it.
If the design and manufacturing do not meet the standards, the pressure vessel manufacturing unit shall be held responsible for this.