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Title	CARGO PUMPS FOR CHEMICAL TANKERS
Accession No	00168333
Authors	Bjerke, L
Corp. Authors / Publisher	Uddeholms AB
Publication Date	19770000
Description	10 p.
Abstract	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.
Supplemental Information	Presented at the Uddeholm Technical Seminar, "Nor-Shipping 77", May 12, 1977, Section 7.
TRT Terms	Cargo handling ; Centrifugal pumps ; Chemical tankers ; Pumps
Other Terms	Cargo pumps
Subject Areas	M03 AUXILIARIES
Report Number	Proceeding
Availability	British Ship Research Association Order Number: BSRA No. 47,233
Document Source	British Ship Research Association
TRIS Files	MRIS
Database	TRIS Online

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