This is made from rolled mild steel plate, usually between 15 and 30 mm thick, welded to form a cylinder which may be up to 230 m in length and up to 6 m in diameter.
The top of the pipe is welded to a # cm square # ± # mm thick mild steel plate that contains a # mm diameter vent hole centrally located in the plate to which a # mm long steel pipe nipple of # mm internal diameter is welded
The top of the pipe is welded to a 38 cm square, 10 ± 0.5 mm thick mild steel plate that contains a 78 mm diameter vent hole centrally located in the plate to which a 152 mm long steel pipe nipple of 78 mm internal diameter is welded.
(a) A vented vessel consisting of mild drawn steel pipe with an inner diameter of 265 ± 10 mm, a length of 580 ± 10 mm and a wall thickness of 5.0 ± 0.5 mm.