Skid means a complete installation up to 10 T and/or 5-6 m lengh. The system includs usually some pipelines, tank(s), electrical devices and often other equipment, all installed on a frame and connected together. The ready product is manufactured, assembled, painted and tested. When shipped to its final destination, the customer needs only to „plug in”. Used materials for the skid vary, depending on the design and branch of industry, where would be employed.