Which is the main pressure component of the pressure vessel
Pressure vessel shell, head, end cover, manhole covers, manhole flange, manhole over, expansion joint, opening reinforcement ring of spherical shell plate, flange, the spherical tank, heat exchanger tube plate and the heat exchange tube more than M36 equipment main bolts and takeover of nominal diameter greater than or equal to 250 mm and pipe flanges are as the main pressure parts.
?head of the pressure vessel shell (cover), expansion joint, flange, the spherical tank of spherical shell plate, tube plate heat exchanger and heat exchange tube more than M36 equipment main bolts and takeover of nominal diameter greater than or equal to 250 mm and the pipe flange See solid volume gauge P3
Please refer to the TSG R0004-2009 "fixed pressure vessel safety technology supervision regulation", which has detailed rules!!
