rubber lining repair works butyl in phosphoric acid day tank d 10 m dia . at np plant , fact cd . , rubber lining repair works ( butyl ) in phosphoric acid day tank d [ 10 m dia . ] at np plant , fact cd . , rubber lining of day tank d at np plant , with pre-vulcanized butyl rubber calendared sheets to a thickness of 12 mm . work involves: pre-vulcanized butyl rubber calendared sheets 6 mm thick suitable for cold bonding , with required adhesives , solvents , curing agent etc . shall be supplied . packing , forwarding , transportation , loading / unloading and storage at fact cd site , ambalamedu , kochi shall be done . surface preparation shall be done by shot / grit blasting with proper cleaning . rubber lining / application shall be done with pre-vulcanized butyl rubber calendared sheets to a thickness of 12 mm in two layers of 6 mm thick each by cold bonding method on bottom plate and shell plate up to 1 metre height from bottom , including manholes , nozzle pipes and flanges on phosphoric acid day tank d at np plant , fact cd as per scope of work detailed in special conditions of contract , general conditions of contract and specification sheets attached . cold bonding , curing , inspection , testing , site supervision , and safety requirements shall be done as per attached specification sheet no . 030b of fact -cd . , rubber lining of day tank d at np plant , with pre-vulcanized butyl rubber calendared sheets to a thickness of 06 mm . work involves: pre-vulcanized butyl rubber calendared sheets 3 mm thick suitable for cold bonding , with required adhesives , solvents , curing agent etc . shall be supplied . packing , forwarding , transportation , loading / unloading and storage at fact cd site , ambalamedu , kochi shall be done . surface preparation shall be done by shot / grit blasting with proper cleaning . rubber lining repair works / application shall be done with pre-vulcanized butyl rubber calendared sheets to a thickness of 06 mm in two layers of 3 mm thick each by cold bonding method on shell plate inside above 1 metre height from bottom including , inside roof area , manholes , nozzle pipes and flanges on phosphoric acid day tank d at np plant , fact cd as per scope of work detailed in special conditions of contract , general conditions of contract and specification sheets attached . cold bonding , curing , inspection , testing , site supervision , and safety requirements shall be done as per attached specification sheet no . 030b of fact -cd .