Applied Test Systems, Inc. (ATS) produced its first custom hydraulic pressure tester in the year 1968. Based on this initial product, and with ongoing guidance from members of ASTM International Technical Committee F-17, a full line of quality high-pressure testing systems, fixtures, and accessories has been developed and is continually being improved. The primary focus in ATS pressure testing has been ASTM designations D1598 and D1599, and our two standard lines of products have been thoroughly developed to suit testing according to these guidelines.