RINA has published a detailed set of Tanker Guidelines, intended to support owners during the specification and
tender process for tanker newbuildings.
Ugo Salerno, RINA CEO, says, "There is intense pressure on owners to order
new tankers now and to snap up newbuilding slots. At the same time the
number of choices owners face when dealing with detailed specifications has
never been more complex. We believe these simple, practical guidelines will
help owners to get both better ships and better relations with the yards. A
key part of RINA's mission
is to provide advice and support to owners."
The Guidelines are primarily intended for the technical staff of shipowners
or independent consultants, in charge of management and supervision of new
ship construction projects, specification development or maintenance of
ships in service. The purpose of the Guidelines is to identify the main
factors that are likely to be of principal concern regarding the structural
design of any newbuilding project.
The Guidelines contain the results of structural design studies, concerning
the steel grades
, spacing of primary supporting members and ordinary
stiffeners and design of transverse bulkheads, carried out for some typical
oil tanker designs. The governing factors are reviewed, in the light of
strength and regulatory considerations including selection of design loading
conditions, ultimate strength of the hull girder, fatigue of structural
details and strength of the crossing arrangement between different
structures such as longitudinal and transverse bulkheads. Advice to owners
when drawing up the specification of new building orders is also given.
In addition, the Guidelines review the main characteristics of corrosion in
oil cargo tanks and examine the most efficient means to prevent it, giving
advice on the actions to be taken at the design and construction stages and
while the ship is in service.