bids are invited for repair and overhauling service - metalic blast bay tank; steel dmr 249a/is 2062; yes; service provider premises one in no metallic ballast bay tank to be manufactured and provided for ships diving support cell at district hq. with following specification for safe charging of high-pressure diving cylinders pre and post diving onboard ships under command. material - steel dmr 249a/is 2062/ equivalent, thickness 10 mm. dimension- length-36 cm, breadth-35 cm height 76 cms. job includes following: - (i). removable top side opening, preferably bolted. (ii). four-point stand arrangement with rubber bushes. (iii). water filling point on top and drain point with valve on bottom. (iv). opening for connecting of diving compressor charging mechanism. (v). opening with auto closing flap for inserting and removal of diving cylinders pre and post charging of diving cylinders. rubber beading to be provided on openings. tank to be painted as per paint scheme total quantity :