DVAI supplies dished head GRC according to NFE81 102 or Torispherical Head according to DIN28011.
DVAI manufactures your heads and bottoms by cold press dishing or embossing process, depending on the diameter and the thickness. Dished heads are manufactured from DVAI’s stainless steel plate stock in order to master the quality and deadlines.
Ri (spherical radius) = De (external diameter)
E = Thickness
Rc (knuckle radius) = 0.1 x De
h2 = Ri - √ ((Ri – rc) ² - (K – rc) ²)
With K = 0.5 x (De- 2 E)