Structural Modifications and Repair

MHI's welding department is fully capable of making repairs to the most stringent requirements. Examples of MHI's past performance include repairs to commercial and naval vessels in way of Cargo Hold Damage, Exhaust Gas Eonomizers, Boilers, Hull Damage, Foundations, Tank Repair, Boat Davits, Super Structure and Main Deck repairs. This group holds certification in the following areas:

Weld repair of 1200lb Steam Boilers
Superheater Tube to Header Seal Welds
Post Welding Stress Relief
SMAW (Shielded Metal Arc Welding) of S-1 (Carbon Steel) Pipe and Plate
S1 Mtl. Comp. Pipe, Plate and Structural
SMAW S1 - S8 Material
GMAW (Gas Metal Arc Welding) S-25 Material
SMAW S-1, S2, S3, & S11 A Material
SMAW S-1 to S-34 Fitting to Pipe
SMAW S-5 CRMO Alloy
SMAW CRMO Pipe and Plate
GTAW 2-34, S-42, & S-43 Material
GTAW S-8 to S-8 With Backing Ring
GTAW/SMAW S-8 Open Root Butt
GTAW S-25 pipe
GTAW of Aluminum Plate
GTAW S-8 to S-1, S-2, S-3, S-4, S-5, S-6, S-11
SMAW S-1 to S-8 Material
GTAW S-34 Material (P-68 Joint Design)
GTAW Insert SMAW Remainder S-1 Material
FCAW S-1 Material
FCAW S-1 Material, Ceramic Backing Strips
SMAW S-1 to S-8 Pipe & Fittings
SMAW Temper Bead Process for S-1 Material
GMAW S-22 Material
SMAW S-1, S-2, S-11A, S-11B, S-11D & P-11A
GTAW S-34, S-42, S-43, Alloys
GTAW Socket Welds, S-34, S-43, S-43 Less than 3/16" thick
SMAW S-34, S-42, S-43 with Backing Ring
SMAW S-1, Alloy Socket Welds Less Than 3/16" Thick
GTAW S-34 to S-1 Cuni Pipe to Carbon Steel Fittings
SMAW S-5, S-4, S-3, S-1 Alloys
SMAW S-1 & P-1 Alloys
GTAW S-1 Alloy Socket Weld Less Than 3/16"
GTAW S-1 with Backing Rings
SMAW S-8 Socket Weld Less Than 3/16"
GTAW S-11B, S-11A, S11D, A11C, S-2, S-1 to S-B Less Than 3/16" Thick
GTAW S-8 Socket Welds Less Than 3/16'
GMAW S-11B, S-11A, S-11D, S-11C, S-2, S-1 to S-8 Alloys
GTAW S-8 Alloy
GTAW S-8 Alloy Root & First Pass
GTAW S-25 to S-25 Alloy 5086H32
SMAW S-1/4N11 Fillet