Hallsta Paper Mill, which is part of Holmen, manufactures paper from wood. In the manufacturing process, there are many piping systems and tanks that require continuous maintenance, both corrective and preventive. Several accidents have occurred during maintenance work where media have remained in the pipes and been expelled onto the maintenance worker. The media in the pipes are often hot and can consist of pulp, water, or steam. Before maintenance work takes place, the pipes are drained, but media sometimesremain in the pipes. The purpose of this thesis is to find a solution to verify that the pipes are empty. A literature study has been conducted on measurement methods that can be used to achieve the purpose. Theory on ultrasound and temperature has been developed and then used in measurement experiments. The literature study also includes industrial safety. Document studies have been conducted in Hallsta's reporting system for accidents as well as in routines and lists. Interviews, observations, and measurement experiments have also been carried out. The data analysis methods used are fishbone diagrams and a comparison between the results of the measurement experiments. Based on the results and the analysis of the results, a solution has been developed to verify that the pipes are empty, which partially meets the purpose. The solution can only be used on pipes containing water and not with pulp or steam.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:uu-533329 |
| Date | January 2024 |
| Creators | Leek, Anton, Olsson, Gustav |
| Publisher | Uppsala universitet, Industriell teknik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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