PV plates rolling direction
PV plates rolling direction
(OP)
I know that it is not usual, but may somebody inform if there is any restriction in ASME Sec VIII Div 1 or other Sections to manufacture a PV with the direction of the plate conformation executated during the fabrication, parallel to the plate rolling direction (as received from the mill)? In this case the axis of the shell (cylinder) will be parallel to the plate rolling direction.
In other words, the cylinder circumferential stress from the internal pressure will be perpendicular to the plate mill rolling direction and not parallel (as usual).
In other words, the cylinder circumferential stress from the internal pressure will be perpendicular to the plate mill rolling direction and not parallel (as usual).





RE: PV plates rolling direction
No restrictions to rolling direction that I'm aware of. As long as you keep your standard longitudinal and circumferential joints everyone should be happy. Anyone roll the plate diagonally, like a spiral welded pipe?
See http://www.coking.com/Vendor/CBI.htm for an application where the plates are formed with the axis of rotation perpendicular to that of the mill.
jt
RE: PV plates rolling direction
In particular for as-rolled plates, the tensile test specimen orientation that is required by paragraph, 11.2 states that the "longitudinal axis of the tensile specimen shall be transverse to the final rolling direction of the plate". Based on this statement it makes no difference how the plates are rolled as long as the rolling direction is established.
Tensile Testing for heat treated plates (after rolling) is also specified in ASME SA-20.
RE: PV plates rolling direction
RE: PV plates rolling direction
Do you think, that if it is used the austenitic SS shell materials, is it recommended to request the plates raw materials with tension tests in the direction transverse of final rolling and also a bend test with the bending axis parallel to the plate rolling direction (as informed in SA 480)?
RE: PV plates rolling direction