Pressure vessels are hermetically-sealed containers that hold gases or liquids at controlled pressures.Typically, at a regime that those substances would not normally be subjected to.
Although the designation of
pressure vessel steel may seem niche, these grades service an extremely wide range of markets.
Common pressure vessel steels are found in domestic hot water storage tanks, compression chambers, petrochemical facilities, LNG tankers, hydraulic and pneumatic reservoirs, and so on. Despite handling an extreme variety of substances at varying temperatures and volumes, each of these applications is unified by the need for high-quality materials with the right thermodynamic properties for the job. Choosing the right pressure vessel steel for your application is subsequently crucial.
There are several factors to consider are:1. Operating temperatures: Many compressed gases are stored at cryogenic temperatures, requiring steels with low brittle-ductile transition temperatures.
2. Tensile strength: Pressure causes tension which can lead to material failure. High-tensile steels Like A516 Grade 70 ensure that pressure vessels avoid this.
3. Weldability: Forming a contiguous hermetically-sealed chamber from steel plates requires alloys to be highly weldable with low loss of mechanical properties following welding.
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