FABRICATION AND ERECTION OF FIRE WATER STORAGE TANK

SUPPLY & FABRICATION OF BOTTOM PLATES / ANNULAR PLATES OF THE TANKS WITH SUITABLE THICKNESS AS PER API 650, DATA SHEET AND TECHNICAL SPECIFICATION OF TENDER DOCUMENT.

SUPPLY & FABRICATION OF SHELL COURSE OF SUITABLE THICKNESS AS PER API 650, DATA SHEET AND TECHNICAL SPECIFICATION OF TENDER DOCUMENT ALONG WITH WIND GIRDER.

SUPPLY & FABRICATION OF CONE ROOF OF SUITABLE THICKNESS AS PER API 650, DATA SHEET AND TECHNICAL SPECIFICATION OF TENDER DOCUMENT.

SUPPLY,FABRICATION & ERECTION OF SHELL MANHOLE Supply, fabrication & erection of Manhole for Tankage Work, Shell Man Hole NB 24" dia,API 650, Shell man hole 600mm diameter with reinforcement pad plates, as per API 650 with flange, Fabrication of manhole cover plate.

NB 4" (N7A/B) (with internal pipe)

BOTTOM PLATE TESTING OF WELDING JOINTS Testing the welding joints of the tank bottom with vacuum box method up to a vacuum of 5 PSI or by air compressor method. Rate to include arrangement of all equipment like glass box, compressor rubber tubes, torchlights and mud packing complete etc. as per specifications. Refer technical specification.

HYDROSTATIC TESTING OF TANK SHELL Hydrostatic testing of tank shell by filling water to maximum level. Rate to include supply and filling of water up to maximum level, observing for weld joint leaks or plate leaks if any. Hammering the joints as per the directions of Engineer-in-charges, decanting water after successful completion of testing, cleaning the bottom, shell and roof and drying it completely as per specifications. Refer to technical specification. Necessary piping, arrangement of water is also in contractor' s scope.

TANK CALIBRATION Supply and erection of float type mechanical level gauge. Physical calibration of tank bottom by water meter up to the datum plate. Rate to include arrangement of equipment and necessary pumping water, taking readings as directed and presenting the same etc.Calibration of tank shell using strapping tape when the tank full with water. Rate to include supply and erection of necessary scaffolding platforms, taking readings at top and bottom of each shell strake after applying sufficient pull by spring balance and presenting results as directed.Refer to technical specification and calibration of tanks as per IS: 2007 and 2008 and CPWD certification. Note: In case of any leaks observed during any of the above tests contractor shall decant the water at his own cost to the satisfaction of the engineer-in-charge. Contractor shall repeat the process till all the leaks are rectified.

PAINTING SURFACE PREPARATION Preparation of external surfaces of tank shell, Bottom (Underside) wind girders, roof ( top surface of deck ), shell and roof appurtenances,& nozzles and internal surface of shell and nozzle by copper slag Blast cleaning thoroughly to SSPC-SP-10 OR S A 2.5 of Swedish Ivonsk Standard SIS 055900-1967 to bare metal to ensure thorough cleaning of surfaces to receive paints as per specifications. Rate to include for providing and fixing scaffolding & curtaining in an approved manner and cleaning of Tank farm area after blast cleaning is completed. Note: Contractor to arrange and keep at site relevant Swedish photographic standards for inspection by AGCL/PLECO Site incharge failing which permission to proceed with work will not be granted.

EXTERNAL PAINTING FOR CARBON STEEL CONE ROOF, ABOVE GROUND TANKS FOR WATER TANKS. Painting the external surfaces of all the type of carbon steel tanks such as external surface of cone roof Vertical tanks which includes shell area and roof area, steel stair case and railings, wind giders, all MS structures & pipelines attached to tanks from the outer shell, tank shall be clean and surface preparation shall be as per specification of Sa-2.5 standard (Copper Slag Blast Cleaning and painting with 2 coat of epoxy Zinc phosphate primer (P6) of 35 microns and 1 coat of Epoxy High Building Coating (F6) to a DFT of 100 μ per coat and 1 coat of Acrylic Polyurethane paint of 40 μ to a Total DFT of minimum 210μ.The colour of paint is to be got approved by the EIC before commencement of work. The water tank is normally painted with sky blue . The rate shall be inclusive of providing camaflouge with additional layer of synthetic enamel of required colour to the tanks . The work should be carried out with all safety standards complete in all respect including supply of all required labours , Scafolding, materials, paints, tools & tackles as per scope and specification of this tender and direction of Engineer in charge.

PAINTING UNDERNEATH OF BOTTOM PLATE Suppy & Application of primer and 2 coats of Coal Tar Epoxy paint ( Minimum DFT 100 micron in each coat) on underneath side of bottom plates of above ground tanks

INTERNAL PAINTING OF STORAGE TANKS: Internal painting (Full Painting) of Carbon steel tanks etc : Painting surfaces such as Underside of tank roof, Upperside of Bottom plates,inner surface of Shell upto first strake or complete inside shell plate as may be decided, underside surface of roof plate, all inside steel structures and inside appurtenances including all exposed surfaces of inside fittings and fixtures wherever painting is possible after surface prepration to SA 2½ standard using mettalic abrasive and painting with Two Pack Polamide Cured 1 coat of Epoxy High Building Coating (F6) to a DFT of 100 μ per coat Total DFT of minimum 100μ. Work Should be carried out with all safety standards complete in all respect including supply of all required labours , Scafolding, materials, paints, tools & tackles as per scope and specification of this tender and direction of Engineer in charge.

SUPPLY & PAINTING HEADINGS ENGLISH/HINDI Supply and painting of corporations names in ENGLISH/ HINDI letters in the middle of the top shell of the tank in black enamel paint (Size of letters 24 Inch Height)

SUPPLY & PAINTING LETTERING ON TANKS Supply and painting the following on the second shell of the tanks in black enamel paint (Size of letters 18 Inch Height) Tank Number Name of the product Tank capacity Date of Hydro test Date painted Date commissioned

SUPPLY & PAINTING LOGO SIGN Supply and painting the Logo sign as directed by Engineer in-charge. Rate to include for supply of required shade of enamel paints of approved make, supply and erection of scaffolding & curtaining and painting the logo as per standard drawing complete. Logo should be painted as per required colour code. (Size of LOGO 48 Inch Height)

PROVIDIND & APPLY , COLOUR BANDS FOR TANK Providing and applying in two coats synthetic enamel paint of approved make with required colour and shade for product identification on the bottom most shell and on the toe of the primary wind girder of the above ground tanks.