ISO 11711-1:2019 船舶と海洋技術—水生妨害種—パート1：バラスト水排出サンプルポート | ページ 6

3.1

ballast discharge pipe

primary pipe used to transfer water between a ship's ballast tanks and overboard discharge

3.2

ballast water

water with its suspended matter taken on board a ship to control trim, list, stability or stresses of the ship

3.3

ballast water system

arrangement of pumps, piping and tanks on ships used to control trim, list, stability or stresses of the ship

3.4

ballast water management system

BWMS

equipment that processes ballast water (3.2) such that the water discharged (the treated water) is intended to meet the specified performance requirements for eliminating or reducing aquatic organisms

3.5

blind flange

closed end of pipe or fitting (3.6) , extending perpendicular to its axis with, bolt holes equally spaced in a circle to abut with another flange (3.7) and isolate a section of pressurized piping

[SOURCE:ISO 2531:2009, 3.10, definition of"flange", modified -"closed" added at the beginning of the definition, and"to abut with another flange and isolate a section of pressurized piping" added at the end.]

3.6

fitting

component other than a pipe, which allows pipeline deviation, change of direction or bore

[SOURCE:ISO 2531:2009, 3.9, modified -"casting" replaced by"component", and Note deleted.]

3.7

flange

end of a pipe or fitting, extending perpendicular to its axis, with opening and bolt holes equally spaced in a circle to abut with another flange

[SOURCE:ISO 2531:2009, 3.10, modified -"opening and" and"to abut with another flange" added.]

3.8

full port valve

full bore valve

valve designed such that flow is unrestricted when it is open

3.9

gasket

sealing component of a joint between two flanges (3.7)

[SOURCE:ISO 2531:2009, 3.13, modified -"between two flanges" added.]

3.10

isolation valve

full port valve (3.8) with flanged faces installed on the sample port (3.14) to allow sealing of the sampling access and installation of a sample probe (3.15)

3.11

nominal size

DN

nominal pipe size

NPS

alphanumeric designation of size for components of a pipework system, which is used for reference purposes

Note 1 to entry: It comprises the letters DN (when relating to millimetres) or NPS (when relating to inches) followed by a dimensionless whole number, which is indirectly related to the physical size of the bore or outside diameter of the end connections.

[SOURCE:ISO 2531:2009, 3.20, definition of"nominal size, DN", and ISO 13703:2000, 3.1.15, reworded.]

3.12

return port

flanged opening that provides a means to return processed water to the ballast pipe downstream of the sample port (3.14)

Note 1 to entry: It does not necessarily accommodate the insertion of a sample probe (3.15) .

3.13

sample collection device

device that can concentrate and collect the larger class of organisms (via a filter or plankton net), collect a whole water sample, or both

3.14

sample port

flanged opening for inserting a sample probe (3.15) into the ballast pipe

3.15

sample probe

tube inserted into the ballast discharge pipe (3.1) through the sample port (3.14) that provides the ability to connect to external piping for collection and processing of a ballast water (3.2) sample

Note 1 to entry: Further specifications of the sample probes will be provided in ISO 11711-2.

3.16

treatment

process or combination of mechanical, physical or chemical methods to kill, remove or render harmless organisms within ballast water (3.2)