Cast iron crack repair by the metal stitching and metal locking process is highly recommended. Metal stitching process for repairing casting is widely used and accepted in the industry, and more successful process for repairing cracks in cast iron.

The steam turbine casing of Hangzhou made was reported damaged due to an accident. The turbine operates at 130 MW peak load.

RA Power Solutions deputed a technician to the site with the latest breed of instruments, equipment and consumables in order to undertake inspection of the turbine casing and to execute necessary repair following observation.

Observation-

Turbine casing due to accident developed multiple cracks at different locations. Cracks of following dimensions were observed.

• Crack having a length of 190 mm with an indiscipline profile
• 2 Cracks having a length of about 300mm
• Casting having dimensions of 600mm/450mm with a thickness of 45mm was damaged into pieces

Crack repair by metal lock and metal stitching.

• Crack repair and damaged casting replacement were undertaken by RA power technicians.
• The damaged casting area was cut, and a disciplined profile was given measuring 650 mm/520 mm. This area was properly ground
• The damaged sample piece was sent for a metallurgical test to know the composition of the material.
• A wooden pattern was made at the site having an exact profile as of the damaged area.
• A new casting piece having superior metallurgical properties than the original damage casting was manufactured.
• The new casting piece was fixed in the damage area by the metal stitching and metal locking process.
• RA power engineers used metal locks, metal keys and all consumables imported from the UK for repair of cracks and damage casting.
• The polishing of the outer and inner surfaces of the damaged area was done and painted.
• The turbine is presently working satisfactorily and has completed 3500 hr of operation.

RA Power Solutions undertakes repair of crack casting by metal stitching and metal locking process for the last 47+ years and has successfully executed repair of heavy components used in power plants, industry, ships, etc.

The metal stitching and metal locking can also be undertaken while sailing the vessel.

To know more about cast iron crack repair, metal locking, cast iron stitching, metal surgery, and engine block repair, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

• cast iron crack repair
• cast iron metal stitching
• cast iron stitching