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SERVICE | IN-SITU MACHINING

IN-SITU MACHINING REPAIR SERVICES
VALVE REPAIR SERVICE
SHAFT REPAIR SERVICES
GEAR REPAIR SERVICES
PUMP REPAIR SERVICES
PIPE REPAIR SERVICES
METAL STITCHING
IN-SITU DESCRIPTION

ADVANTAGES OF IN-SITU MACHINING

O

nsite Machining services for scheduled maintenance, construction, emergency repairs.

PT. BIRAWA ADHI PRATAMA provide services for In-Situ Machining and comes into its own when a workpiece is too large or fixed in application and cannot be moved to a machine shop. Portable machines can be used in some of the most remote situations and produce equally high standards of quality and finish to that of a machine shop. Be it Pipe Cutting, Flange Facing, Milling, Drilling or Boring, the range of portable machines can be mobilised to the location at minimal notice.

In on-site machining work, technical specifications and practical demands often vary from job to job, site to site.Where the application is unique or requires special considerations, BIRAWA has the technical expertise and experience to develop customized work procedures, modifying machines and fixtures to suit the job.

  • Dampens and absorbs compression stresses.
  • Provides a good ‘expansion joint’ for such castings as cylinder liners, diesel heads or any vessels subject to thermal stresses.
  • Distributes the tension load away from fatigue points.
  • Maintains relieved conditions of inherent internal stresses where rupture occurred.
  • Maintains alignment and original surfaces, since lack of heat produces no distortion.
  • The vast majority of repairs can be done in situ, with consequent savings in time with little or no dismantling.
METAL STICHING

PT. BIRAWA ADHI PRATAMA provide services for process "Metal Stitching" allows us to permanantly repair a crack or blow-out hole without welding.

METAL STICHING

PT. BIRAWA ADHI PRATAMA provide services for process "Metal Stitching" allows us to permanantly repair a crack or blow-out hole without welding. The cracked metal is replaced with special metal stitching pins that we install by drilling and tapping to draw the sides of the crack together. This results in a continuous row of interlocking stitching pins to create a strong, pressure-tight repair. To restore the casting to its original strength, we install locks across the joint line of the pins by drilling a precision hole pattern with special drill fixtures. After the hole pattern is created, the locks are driven in, pulling the repair togther even tighter.

The repaired, metal-stitched area is gas and liquid tight to create a pressure tight repair. In addition, metal stitching Dampens and Absorbs Compression Stresses. It also spreads tensile strains and distributes the load away from the original failure point, while maintaining the alignment of the original surfaces.

This metal stitching method is employed mostly on cast iron components, but it is also effective on any other machinable metal, such as ductile iron, steel, aluminum and bronze castings.

METAL CASTING REPAIR DIAGRAM

THE PROCESS

  1. Using a drill jig, rows of blind holes are drilled perpendicular to the direction of the crack, each row to act as a key.
  2. The intermediate partitions are removed with pneumatic chisel.
  3. Keys are driven into the opening and caulked.
  4. Holes for Metalock screws are drilled along the crack between the keys.
  5. The screws are fitted to ensure they overlap, effecting a seal along the fracture.
  6. Finally, the entire installation is caulked to ensure stability and pressure tightness.

A trusted technique used to repair machines and structures

Whilst the tried, tested and unique repair system is a repetitive operation, the application is as varied as the plant and machinery for which it is designed. This extends from ship’s engines to power presses and petro chem refineries to heritage buildings.

Benefits of metal stitching include:

  • On-site insitu metal stitching repair 24 x 7
  • Less downtime - production is up and running again
  • The procedure and process is recognized throughout the world
  • The cold repair process is far more cost effective than the purchase of new, expensive cast parts
OUR CLIENT