Page 28 - ITAtube Journal 2/2019

Technical Papers
Before machining
2. Combined reactor pipe ange
Flange OD: DN400 No. of bolt hole: 20 Seal face type: at Machine: TU600
Procedure:
Clean surface
Machining with cutting tool Low rotation, low feeding Fine machine with insert bits
Conditions:
Seal face corrosion
Cutting Depth: 0.3mm the machining cutting depth determined depending on the corrosion situation
Surface tolerance: Ra1.6
3. Heavy oil hydrogenation lter ange
Flange OD: DN400
Num. of bolt hole: 16
Seal face type: RTJ Machine: TU1100RTJ
Conditions:
As the width of the seal groove is too big, the ring gasket hardly has any effect.
4. Residuum oil hydrogenation reactor cover
Seal MD: 1090mm
Num. of bolt hole: 24
Working temp.: 340 °C Working pressure: 170 MPa Seal face type: RTJ Machine: TU1100RTJ with extended support arm
Conditions:
The seal surface deformed due to the hardness of the gasket and incorrect tighten method. The mounted dimension has beyond the max. clamping
OD of the machine, we have to use extended arm. But we don’t know what will follow once we use non-standard accessory.
Deformed Crack
ITAtube Journal No2/May 2019
28