About AP Fabrications.  AP Fabrications specializes in skid-based process equipment and has built and installed more than 15 biodiesel plants around the United States, with 3 more in the works. They have machine shop capabilities and fabrication and welding capabilities to cut and form raw materials into tanks and pressure vessels to suit every customer's needs. In addition, they have certified crews available to install process equipment and piping at sites away from the shop. The shop has its ASME U stamp for pressure vessels, PP stamp for boiler and power piping, and the R stamp for repair of pressure vessels.  AP Fabrications, 801 E. 2nd St, Stuttgart, AR 72160.  (870.673.8504).