CARGO PUMPS FOR CHEMICAL TANKERS
The Author, of Thune-Eureka A/S, briefly discusses the merits of tank-installed (i.e., deep-well and submerged) cargo-pumps in chemical tankers, as opposed to the provision of separate pump-rooms. The design of pumps for chemical cargoes, in particular in parcel tankers, is then discussed in some detail. Aspects considered include: the various types of pump (centrifugal, and the screw and reciprocating types of positive-displacement pump) available for different applications and the relative merits of the different types; pump speed-control and drive; pump materials, and their corrosion resistance and weldability; and sealing systems for dry-mounted, portable submersible, and submerged pumps. It is concluded that the chemical tanker used for carrying a variety of cargoes (possibly up to 50 different ones simultaneously) should have variable-speed pumps, with hydraulic drive from a ring-main hydraulic system. Tank-installed centrifugal pumps are usually the best choice, but for very viscous liquids at least some of the tanks should have screw pumps housed in a pump-room, or, as an alternative for such cargoes, the tank-installed centrifugal pump could be assisted by a deck-mounted booster pump. As parcel tankers are liable to transport edible oils, to avoid the risk of contamination by hydraulic oil (e.g., that used for driving a submerged pump) the logical answer for the tanks concerned is the deep-well pump (which has its motor on deck). Order from: BSRA No. 47,233.
- Presented at the Uddeholm Technical Seminar, "Nor-Shipping 77", May 12, 1977, Section 7.
Uddeholms ABS-68305 Hagfors, Sweden
- Bjerke, L
- Publication Date: 1977
- Pagination: 10 p.
- TRT Terms: Cargo handling; Centrifugal pumps; Chemical tankers; Pumps
- Old TRIS Terms: Cargo pumps
- Subject Areas: Freight Transportation; Marine Transportation; Vehicles and Equipment;
- Accession Number: 00168333
- Record Type: Publication
- Source Agency: British Ship Research Association
- Report/Paper Numbers: Proceeding
- Files: TRIS
- Created Date: Feb 16 1978 12:00AM