bids are invited for custom bid for services - cleaning of coke deposition of vertically mounted usx exchanger tube diameter of tube 6 inch 152mm of gas cracking furnace with 20000 psi hydrojetting machine power lance and accessories , custom bid for services - cleaning of polymer scaling of horizontally mounted heat exchanger tubes with 20000 psi hydrojetting machine with power lance and accessories , custom bid for services - cleaning of polymer scaling of vertically mounted heat exchanger tubes with 20000 psi hydrojetting machine with power lance and accessories , custom bid for services - cleaning of water or steam or condensate scaling of horizontally or vertically mounted heat exchanger tubes at suitable pressure with 20000 psi hydrojetting machine with power lance and accessories , custom bid for services - cleaning of polymer scaling of shell or dish end tube bundle or pipes or vessel or columns or other equipment with 20000 psi hj pump , custom bid for services - cleaning of water or steam or condensate scaling of shell or dish end tube bundle or pipes or vessel or columns or other equipment with 20000 psi hj pump