Vessels
Shells, spheres and the heads that close them. Each of these opens in the browser with default sizes that already give a verified flat pattern: change them to yours, check the drawing, add seam and flange allowances, and export.
Shell with Nozzles
A cylindrical shell unrolled to a rectangle, with the holes for up to four radial nozzles marked in their developed shape.
Open Shell with NozzlesTank Shell
The shell of a storage tank or silo in courses and plates from stock, the vertical seams staggered, with a nozzle or manway marked on its plate.
Open Tank ShellSilo
A silo, bin or hopper as one job: the body, the cone bottom from its wall angle, the spout, a support skirt and a cone roof, with what it holds.
Open SiloReinforcing Pad
The pad welded round a nozzle on a shell or a pipe: rolled to the shell, with the hole for the nozzle and a tell-tale hole, whole or in two halves.
Open Reinforcing PadSphere
A sphere made of plates: gores from pole to pole, or zones round it, with a round cap at each pole.
Open SphereDished Head
A vessel head in petals round a crown plate: torispherical, hemispherical, semi-elliptical (2:1), or a cone with a knuckle.
Open Dished Head