These vessels are designed to contain any liquid or gaseous substances at pressures slightly equal or higher than that of atmospheric conditions. Also, these tanks are equipped with controls and accessories to complete a sub-process as part of the whole process. Enertech allows the customer to decide on the applicable codes and standards to be used, with American Society of Mechanical Engineers (ASME) and American Petroleum Institute (API) as the most preferred codes; but is not limited to the two codes.