NATIONAL SHIPPING AGENCIES LLC

Ship repairs

BLANKING / PLUGGING / COFFERDAM BASED REPAIRS

FABRICATION OF ALL KINDS OF COFFERDAMS, BLANKS AND PLUGS WHICH ARE REQUIRED TO RESTRICT WATER INGRESSION TO ALLOW FOR INTERNAL REPAIRS TO BE UNDERTAKEN SAFELY. THESE REPAIRS RANGE FROM VALVE REPLACEMENT TO INTERNAL PIPELINE OVERHAULING. THESE OPERATIONS CAN EFFECTIVELY ALLOW THE VESSEL TO AVOID DRY DOCKING CAUSING OFF HIRE TIME AND LARGE COMMERCIAL COSTS.

REMOVAL AND INSTALLATION OF TRANSDUCERS / SPEED LOGS / ECHO SOUNDERS

FABRICATION OF ALL KINDS OF COFFERDAMS, BLANKS AND PLUGS WHICH ARE REQUIRED TO RESTRICT WATER INGRESSION TO ALLOW FOR INTERNAL REPAIRS TO BE UNDERTAKEN SAFELY. THESE REPAIRS RANGE FROM VALVE REPLACEMENT TO INTERNAL PIPELINE OVERHAULING. THESE OPERATIONS CAN EFFECTIVELY ALLOW THE VESSEL TO AVOID DRY DOCKING CAUSING OFF HIRE TIME AND LARGE COMMERCIAL COSTS.

INSTALLATION OF ROPE GUARDS / ROPE CUTTERS / SACRIFICIAL ANODES / SEA CHEST GRATINGS

FABRICATION AND UNDERWATER INSTALLATION OF THE BELOW UNDERWATER HULL APPENDAGES WITH HIGHLY EXPERT AND SKILFUL TEAM. ROPE GUARD ROPE CUTTERS SACRIFICIAL ANODES (BOLTED AND WELDED) REPLACEMENT OF SEA-CHEST GRATINGS.

PROPELLER TRIMMING AND ACFMTESTINGS

REPAIRS OF THE PROPELLER BLADES BY TRIMMING / CROPPING OF THE EDGES TO MAKE THEM SMOOTH WITH THE HELP OF SPECIALIZED TOOLS. PROPELLER BOSS CAP FINS (PBCF) CAN ALSO BE INSTALLED UNDERWATER ADDITIONALLY, MSS ALSO OFFERS A NDT PROCEDURE KNOWN AS ALTERNATING CURRENT FIELD MEASUREMENT (ACFM) FOR PROPELLERS TO VERIFY IF THERE ARE ANY CRACKS PRESENT IN THE BLADES, THE TEMPORARY REPAIRS CAN BE ARRANGED TO SEIZE THE PROPAGATION OF THE CRACKS.

UNDERWATER WELDING / CUTTING AND INSERT REPAIRS

WET WELDING ALONG WITH APPROVED WELDING PROCEDURE SPECIFICATION (WPS) TO CONDUCT UNDERWATER WELDING FOR SCOPES SUCH AS ROPE GUARD, ROPE CUTTERS, INSERT PLATE REPAIRS, RUDDER ACCESS PLATES , SACRIFICIAL ANODES (BOLTED AND WELDED), REPLACEMENT OF SEA-CHEST GRATINGS.

BLANKING / PLUGGING / COFFERDAM BASED REPAIRS
We offers the fabrication of all kinds of Cofferdams, Blanks and Plugs which are required to restrict water ingression to allow for internal repairs to be undertaken safely. These repairs range from valve replacement to internal pipeline overhauling. These operations can effectively allow the vessel to avoid dry docking causing off hire time and large commercial costs.
REMOVAL AND INSTALLATION OF TRANSDUCERS / SPEED LOGS / ECHO SOUNDERS
We offers the fabrication of all kinds of Cofferdams, Blanks and Plugs which are required to restrict water ingression to allow for internal repairs to be undertaken safely. These repairs range from valve replacement to internal pipeline overhauling. These operations can effectively allow the vessel to avoid dry docking causing off hire time and large commercial costs.
INSTALLATION OF ROPE GUARDS / ROPE CUTTERS / SACRIFICIAL ANODES / SEA CHEST GRATINGS
We provide the Fabrication and underwater installation of the below underwater Hull appendages with highly expert and skilful team. Rope Guard Rope Cutters Sacrificial Anodes (Bolted and Welded) Replacement of Sea-chest Gratings.
PROPELLER TRIMMING AND ACFM TESTINGS
We offers Repairs of the Propeller Blades by trimming / cropping of the edges to make them smooth with the help of specialized tools. Propeller Boss Cap Fins (PBCF) can also be installed underwater Additionally, MSS also offers a NDT procedure known as ALTERNATING CURRENT FIELD MEASUREMENT (ACFM) for Propellers to verify if there are any cracks present in the blades, the temporary repairs can be arranged to seize the propagation of the cracks.
UNDERWATER WELDING / CUTTING AND INSERT REPAIRS
We have specialized team of Divers who are Class approved for Wet Welding along with approved Welding Procedure Specification (WPS) to conduct underwater welding for scopes such as Rope Guard, Rope Cutters, Insert Plate Repairs , Rudder Access Plates , Sacrificial Anodes (Bolted and Welded), Replacement of Sea-chest Gratings.