Threaded closures consist of field weldable hubs forged from carbon steel in SA-350 and SA-105. Caps from SA-350-LF2 and SA-516-Gr. 70 carbon steel meet ASTM and ASME Section VIII, Division I. Mating threads are wide pitch ACME. Hinge is designed to allow custom adjustment after installation, and is standard for 14″ and larger. For hinges on 3″ through 12″, please see individual pricing. Options include horizontal, vertical, or angle mounting; left or right-handed orientation; ANSI class 150 through 2500; ASME code stamp; NACE MR-01-75 certified; various elastomer compound o-rings; customer-specified external coating; hinged assembly; pressure warning device.