The company's product range has increased over time, reflecting well customers' demands for complete solutions from design to startup of equipment from the same service company. In doing so, one party is responsible for the project as a whole. After the equipment is operational, HD then offers maintenance services and provision of spare parts, thereby following the product while it is in operation with customers.
HD suppliers include Denmark, UK, Germany, Sweden, Italy, USA, and other countries. Below you can see the list of the main product categories offered by HD.