In process industries a break in one of the processes in the chain of production can lead to severe consequences as the entire production flow will be stopped and thus the entire output. Therefore, maintenance of the machinery and availability of spare parts are two pertinent issues. In order to secure the latter, process-based companies purchase and build up a stock of spare parts that subsequently leads to high capital being tied up. At the company Smurfit Kappa Kraftliner in Piteå no consistent system has been worked out to handle the issue of storing spare parts. Today, the company stores spare parts together with other type of material and products. This leads to problems connected to the possibility of overlooking and maintaining the high level of service needed to keep spare parts available at all times for the manufacturing department and at the same time keep the value of the tied up capital as low as possible. Therefore, the purpose of this thesis is to study how spare parts in the paper industry should be systemized and structured to enable an effective management of spare parts, which would lead to a decrease regarding tied up capital? In order to achieve the purpose, the study started with an analysis of the current situation at the company. A theoretical framework was developed with a focus on logistics management, spare part management, standardization and cooperation. A benchmarking was also carried out by studying two other paper mills and their management of spare parts. The result of the study is concluded in five main recommendations aiming at reducing tied up capital regarding spare parts and their storage. The headlines of these recommendations are:- Standardized work and Knowledge transfer - ABC-Classification - An action plan to reduce tied up capital - Extended use of computer systems - To divide the storage in the computer system This thesis has partly been carried out at Smurfit Kappa Kraftliner Piteå so personnel at the company have continuously been involved in the study to help securing the applicability of the results.