DVAI manufatures bottom PRC (Small Knuckle Radius) or Shallow Head according to NFE81 101 for tanks and vessels.
Dished heads are manufactured from DVAI’s stainless steel plate stock in order to Master the quality and deadlines.
The PRC head is a good and cost-effective solution for equipment that will not be exposed to pressure. It needs less material for the manufacturing.
TECHNICAL CHARACTERISTICS – Norm NFE 81-101
Knuckle radius value (Rc)
DE < 800 : Rc = 30
800 <= DE < 1000 : Rc = 40
1000 < DE : Rc = 50
RI - √( (RI – rc)² - (K – RC)²)
Avec K = 0.5 x (De- 2 E)
- Machine polishing possibility
- Head cutting possibility for openings
- Possibility to manufacture your shells with the exact expansion length of your heads for easy assembling