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Removal of Turbine Casing Bolt and Screw Size-Up

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The company developed and employs a variety of on-site equipment in order to carry out repair of components that cannot be taken out of the site.

Type of Machine

  • TBN Casing Machine
  • Boring M/C
    (A dedicated device for a Screw thread and Bolt Removal)
  • Milling Machine
  • Polishing Machine
  • Etc.

Repair & Maintenance of LP Inner Casing ( Below 2 inches )

Removal of IP Casing Bolt and Screw Size-Up ( 4 inches )

Removal of HIP TBN Casing Bolt and Screw Size-Up ( 6 inches )

Cut off an Anchor Bolt

Portable M/C Set Up

Removal of Anchor Bolt

Removal Completion

Portable CNC M/C Set Up

Bolt Size-Up Completion

Classification of repair methods according to bolt materials.

Bolt Materials Used Equipment Note
1.25 Cr steel 1.Magnetic drill
2. Portable Boring Machine
3. Portable CNC Milling Machine		  
12Cr 1.Magnetic drill
2. Portable Boring Machine
3. Portable CNC Milling Machine		  
Inconel Portable CNC Milling Machine  

Classification of repair methods according to bolt size.

Bolt Size Used Equipment Method of Tapping Note
Standard Depth of embedment
Below 2” < 100mm Magnetic Drill Hand-operated Tap  
Portable Milling Machine Hand-operated Tap  
Above 2” > 100mm Portable CNC Milling Machine Whirling process of CNC Screw