Castings shall be as manufactured produced by Upadhaya Valves manufacturers pvt. Ltd., Howrah. They shall be of uniform quality, Free from blowholes, Porosity, Shrinkage distortion, Hard spots or other defects. They shall be smooth and well, Cleaned by shotblasting or by some other approved method. Unless an alternate specification is made they shall be coated with asphalt paint which shall result in a smooth coating, Tough and tenacious not tacky, When cold and brittle.