In order to ensure optimal performance of heat transfer along the corrugator, we advice to undertake periodic internal performance evaluation and/or maintenance to the steam system, combined with an annual/biannual external site service.
However, it is important to note that there is no existing preventive maintenance that can avoid unexpected mechanical failure on mechanical components such as steam traps, non-return valves, blocked strainers, bad-positioned siphons, etc.
In opposition to the typical failures that can occur in a corrugator, such as a mechanical failure involved in a Single Facer, the Double Facer belt roll, etc., the main adversity production teams face when dealing with heat transfer problems is that, unless catastrophic, it won’t have an immediate clear effect on production. Therefore, this is likely to result in a gradual decrease of production quality and/or speed, followed by a modification of the corrugator operational parameters (pressure set points, wrap percentages, etc., required to achieve a given paper temperature target), as a result of the operator avoiding the problem (a problem that has not been correctly diagnosed or not noticed). In the long term, this modification of the operational parameters becomes a norm, where operators may get used to the problem, hence the problem ceases to exist (until appropriate diagnose is made), thus affecting the operational parameters of the corrugator. In brief: instability and lack of repeatable operational conditions with the consequent non-standard product outcome.
Such failure, when met, will most likely have an impact in production that will clearly exceed, in economical terms, the overall steam system preventive maintenance budget. This reinstates the importance / need of a complementary approach: RAS.
More information on RAS is available upon request