DISHED AND FLANGED HEADS

LINK HONOR is the specialist of stainless steel dished heads and bottoms according to different standards.

A dished head is constituted by a spherical cap, a toric element and a cylinder-shaped edge.

· PRC : Small knuckle radius head NFE 81-101 or Shallow head

· MRC : Medium knuckle radius head NFE 81-104

· GRC : Large knuckle radius head NFE 81-102 or Klöpper head, DIN28011

· Elliptical head NFE 81-103 or Korbbogen head, DIN28013

 

DE: external diameter
E: nominal thickness
RI: spherical radius
RC: knuckle radius
H2: theoretical internal arrow
H1: straight edge height

We manufactures Heads according to PED 97/23 EC for pressure vessels. The stainless steel material is certificated according to Pressure Equipment Directive (97/23/EC).

TOLERANCES ACCORDING TO NFE 81 100

- Expansion length tolerances:

· Case of MRC and PRC: 

- If De <= 2000: 0/+6 mm

- If De > 2000: 0/+10 mm

· Case of GRC and ELL:  

- If De <= 6000:          +/- 0.003 x De
- If De > 6000:            +/- 0.001 x De

- Thickness tolerances: minimal thickness = 85% of nominal thickness

- Depth tolerances strong + strong:       

· Depth <= 6mm : +/- 0.0075 x De

· Depth > 6mm : +/- 0.01 x De

• 
• 
• 
• 
• 
• 
• 
•