Mixture: According to mix design and regular checking aggregates, water and Cement are used by weight. Instructions are written on boards for proper mixtures. Instructions are given to consume mixture within 30 minutes for its proper strength. IS 456 is followed for this.
Molding: All moulds are properly cleaned from Hand Grinder after opening. Proper supports are given for centering of cages. {If it is higher dia 2 cages are made as per IS: 458 and upper cage is always 75% of inner cage} Proper oiling is done on moulds as well as on bushes and rings. These are properly packed with tie rods and nut-bolts.
Manufacturing: After molding moulds are properly kept on runners with the help of Chain Pulleys. Initially while pouring the mixture RPM of machine is very slow for proper pouring and than RPM are up to 1500 as per the requirement of IS: 458. When the proper spinning is done it leaves extra water which gives the strength to the pipe. After it, finishing of pipes is done by cutting from rods and brushes.
Demolding: While demolding, with the help of Chain pulleys moulds are separated. Moulds are demoulded after 24 hours for proper quality of pipes.
Marking: After manufacturing process, all pipes are marked and dated from permanent marker. Supervisor record all these marked numbers in front of tagged numbers and after wards these are stored in Computer by date and marked number wise with the weigh of cages.
Curing: After Demoulding with the help of Trolleys, Hydra and ceilings pipes are kept in curing tanks for proper curing. Rotation of pipes is done daily and 24 hours Sprinklers are on. After 28 days curing pipes are taken out from tanks and storage is done.