bids are invited for facility management services - lumpsum based - industrial; as per sla; consumables to be provided by service provider (inclusive in contract cost) - comprehensive maintenance of floating head shell & tube heat exchangers e-138a & e-138b (excluding re-tubing work) , tube plugging , repeat shell-side hydrotest: , repeat tube-side & shell-side hydrotest , tube bundle pulling and reinstallation: , mobilization and demobilization for re-tubing work , tube re-tubing: , hydrojet cleaning of exchanger tubes using a minimum 15,000 psi hydro jetting machine , mobilization & de-mobilization of hydro jetting machine including the technicians.