Small and medium-sized enterprises carry out specific action strategies, which are related to the difficulty of surviving on the market. Often at the stage of formation they are looking for niche markets and focus on them throughout their further business. The research conducted by the gas sector undertakings sought to determine the extent to which this type of procedure is being implemented. The market life of the company and the level of specialization were taken into account. It was also taken a study to find out if there was a link between the ability to survive on the market and the level of specialization the company was realizing. High specialization limits the possibility of self-fulfillment of complex orders from customers, which makes it necessary to establish cooperation between enterprises. Consequently, the study also concerned the frequency of such cooperation.