Leaders in Onsite Abrasive Blasting & Protective Coatings
OwnerGujarat State Petroleum Company
ClientLarsen & Toubro Limited
Area Applied2500m2
StructureSix-legged wellhead jacket

Special Efforts: Usage of cherry picker & scaffolding at up to 30m


  • Blasting : SA 3
  • TSA : 250µm
  • Sealer : Silicone Aluminium

Ash Marine Pte Ltd successfully carried out thermal spraying and sealer coat painting works for the six-legged wellhead jacket for Deen Dayal Field Development project which commenced late 2010. Constructors for the jacket were Kencana HL based in Lumut, Malaysia. Thermal Spray Aluminium coating was applied on the splash zone areas of the jacket. An area spanning 2500 square meters was coated. Three numbers of twin arc spray machines using 3.2mm wires were used for this project which required a nominal aluminium thickness of 250µm. Blasting requirements were SA3 and silicone aluminium sealer coating was applied on the TSA coated surface.

TSA repair works due to weld and mechanical damage were part of the work scope. This project presented particular challenges in that half of the areas had to be applied with TSA during and after the installation. Application had to be carried above ground at heights up to 30 metres on scaffolds and cherry-pickers. Apllication on platform grating which was already installed and erected at 20m-30 proved particularly challenging and had to be carried out with cherry-pickers. Limited mobility and tight space posed a tremendous challenge in carrying out the application which was surmounted with ingenuity and out of the box thinking. All quality inspections and tests, conducted by Ash Marine and Kencana personnel was witnessed by L&T and EIL and verified by DNV had passed without a problem. The TSA application was completed and handed over well within dateline on the 15th of March 2011.

Vishal Mehta – Lead Engineer, L&T
Balaji Prasad – Project Quality Manager, L&T