Membrane pressure vessels are designed for constant use as a housing for membrane elements. Vessel has been designed to meet the standards of the American Society of Mechanical Engineers (ASME), Boiler and Pressure Vessel Code, Section X. At an additional cost, vessels can be checked during fabrication by an ASME Authorized Inspector and Code stamped. Pure Aqua stocks a large quantity of 2.5", 4" and 8" membrane pressure vessels that range in pressure from 300psi all the way up to 1000psi for high pressure membrane systems. Each membrane pressure vessel comes with mounting pads, straps, hardware and also both end caps.