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Marine and machinery systems and equipment 2018

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Marine and machinery systems and equipment 2018 ( marine-and-machinery-systems-and-equipment-2018 )

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Term Definition piping system a piping system is defined to include piping, as well as components in direct connection to the piping such as pumps, heat exchangers, evaporators, independent tanks etc. with the exception of main components such as steam and gas turbines, diesel engines, reduction gears and boilers redundancy the ability to maintain or restore a function when one failure has occurred Redundancy can be achieved for instance by installation of more than one unit (component redundancy) or by having two or more separate systems capable of performing the same function (system redundancy). system availability the time the system is available — System category Continuous availability (R0) High availability (R1) Manual system restoration (R2) Repairable systems (R3) Repair time None 30 seconds 10 minutes 3 hours For more detailed definitions seeDNVGL-OS-D202 Ch.2 Sec.1 [2]. self-elevating unit ship-shaped/surface unit a unit with movable legs capable of raising its hull above the surface of the sea a unit with a ship- or barge-type displacement hull of single or multiple hull construction intended for operation in the floating condition 5 Abbreviations Abbreviations used are given in Table 6. Table 6 Abbreviations Term ABS ANSI API ASME BS CG DIN EN GMAW GRE GRP GTAW Definition acrylonitrile butadiene styrene American National Standards Institute American Petroleum Institute American Society of Mechanical Engineers British Standard (issued by British Standard Institution) DNV GL class guidelines Deutsches Institut für Normung e.V. European norm gas metal arc welding glass fibre reinforced epoxy glass fibre reinforced polyester gas tungsten arc welding Offshore standards, DNVGL-OS-D101. Edition January 2018 Marine and machinery systems and equipment Page 13 DNV GL AS Chapter 1 Section 1

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