Carlos Quandt Aug 13, 2010:

pressão head, pelo que entendo, é equivalente a pressão hidrostática.
É medida em função da altura da coluna de líquido (em metros, pés, polegadas, milimetros)
veja na ref. da wikipedia - pressure head or static head.

Salvador Scofano and Gry Midttun (asker) Aug 13, 2010:

Hi Isabelle, thanks!
Pressure is not very likely to be the term. The text never mentions anything related to the pressure in the next paragraphs. I understood that the level is the key for the leakage problem in this case (leakage in cargo oil tanks and bunker oil tanks). Thanks again and have a nice weekend!

Isabelle17 Aug 13, 2010:

could it be pressure head? Tanker vessels for the transportation in bulk of liquid cargo are known in the art. See, for example, U.S. Pat. No. 2,918,032. Such tanker vessels generally comprise a plurality of liquid-tight transverse bulkheads and one or more liquid-tight longitudinal bulkheads which subdivide the tanker vessel into a plurality of liquid-tight storage compartments. If the bottom or a side of the hull of such a tanker vessel is ruptured by grounding or some other accident, the affected cargo tanks will leak until the "pressure head" of the liquid cargo in each tank, i.e., approximately the portion of the liquid cargo disposed above the waterline of the vessel, flows out of the tanker vessel. Such leakage is a significant potential problem in so-called "SWBT" and "double-bottom" tanker vessels which have greater freeboard than conventional tanker vessels, and, hence, a greater cargo pressure head.

http://www.freepatentsonline.com/4241683.html

Salvador Scofano and Gry Midttun (asker) Aug 13, 2010:

Obrigado, Teresa. Realmente é por aí.

Salvador Scofano and Gry Midttun (asker) Aug 13, 2010:

Vou retirar. Achei o termo "desnível" usado para a área de hidráulica, que acredito que atenda ao contexto.

Maria Teresa Borges de Almeida Aug 13, 2010:

A inspiração veio daqui... IATE
Domínio Ciências da Terra
en Definição height of a column or body of fluid above a datum expressed in linear terms, often used to express gauge pressure
Refª definição CETOP-RP100

Termo head
Fiabilidade 3 (Fiável)
Refª termo CETOP-RP100
Data 01/02/2008

pt Termo altura

Maria Teresa Borges de Almeida Aug 13, 2010:

Será... ... altura?