Tham khảo tài liệu 'guide to ship repair estimates episode 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Capacity m3 hour Man-hours per machine 10 50 20 55 50 60 100 70 200 80 300 90 400 100 500 120 600 150 Note For three-stage compressors charge rate to be increased by 150 . Receivers Table Air receivers Opening up manholes cleaning internal spaces for inspection painting internal areas and closing manholes with owner s supplied jointing materials. Capacity m3 Man-hours per receiver 1 16 5 20 10 24 15 28 20 32 30 36 40 40 50 48 60 52 Mechanical works 61 Pumps Table Horizontal centrifugal-type pumps Disconnecting and removing top half of casing releasing shaft coupling from motor drive slinging and removing impeller shaft and wearing rings. Withdrawing impeller shaft sleeve and bearings from shaft. Cleaning all exposed parts calibrating and reporting. Reassembling as before using owner s supplied parts jointing materials and fastenings. Capacity m3 hour Man-hours per pump 5 20 10 24 20 32 50 34 100 40 200 48 300 52 500 56 750 60 1000 64 1500 72 Notes Assuming single-stage pump. Assuming driven by an attached electric motor. For multi-stage turbine-driven pumps see the rates given for water-tube boiler feed pumps and assess accordingly. 62 Guide to Ship Repair Estimates in Man-hours Figure 12 A vertical electric-driven centrifugal water pump Mechanical works .
