Mactenn has maintained a philosophy of self sufficiency for the manufacture of our products. Since 1980, the company has possessed a National Board license for the design and manufacture of ASME Section VIII Division 1, U and UM Code stamped vessels. Special pressure vessels for pneumatic conveying systems have been produced for design pressure to 500 psig. In-house machining operations and system control panel production ensures that we have tight control of our costs and quality requirements at each stage of the process. The company has also been awarded a TÜV license for the production of pressure vessels for use in Germany and other European countries.