Medium Knuckle Radius MRC - NFE 81 104
DVAI is the specialist of MRC (Medium Knuckle Radius) bottoms accroding to NFE 81-104. The dished heads are manufactured from DVAI’s stainless steel plate stock in order to master the quality and deadlines.
NFE 81-104 technical features
H2 = RI – √ ((RI – RC) ² – (K – RC) ²)
With K = 0.5 x (DE- 2 E)
E = Thickness
DE: external diameter
E: nominal thickness
RI: spherical radius
RC: knuckle radius
H2: theoretical internal arrow
H1: straight edge height
With K = 0.5 x (DE- 2 E)
E = Thickness
DE: external diameter
E: nominal thickness
RI: spherical radius
RC: knuckle radius
H2: theoretical internal arrow
H1: straight edge height
Technical data
| De | E | h2 | Ri | rc | H1 |
|---|---|---|---|---|---|
| 1250 | 5 | 194 | 1250 | 50 | 25 |
| 1500 | 5 | 230 | 1500 | 55 | 25 |
| 1900 | 5 | 293 | 1900 | 70 | 25 |
| 2500 | 6 | 387 | 2500 | 95 | 25 |
| 3000 | 6 | 505 | 3000 | 180 | 25 |
Other types of tanks heads
Half sphere
Conical head
Spherical cap
Flat head
Our services
Klopper heads stock
Openings for nozzles
Edge machining
