Section 7 Size of bilge suction pipes
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 15 Piping Systems and Pressure Plant - Chapter 2 Ship Piping Systems - Section 7 Size of bilge suction pipes

Section 7 Size of bilge suction pipes

Parent topic: Chapter 2 Ship Piping Systems

7.1 Bilge main

7.1.1 Where a bilge main is fitted, its internal diameter d m is to be not less than that required by the following formula:

where
B = breadth of craft, in metres, for mono-hull craft
= breadth of a single hull in metres, for multi-hull craft
D = moulded depth to the watertight deck, in metres
L = length of craft, in metres.

The actual internal diameter of the bilge main may be rounded off to the nearest pipe size of a recognised standard, but d mis in no case to be less than 50 mm.

7.2 Branch bilge suctions

7.2.1 The diameter d b of branch bilge suction pipes is to be not less than that required by the following formula:

where
B and D = are as defined in Pt 15, Ch 2, 7.1 Bilge main 7.1.1
C = length of compartment, in metres.

The actual internal diameter of branch bilge suction pipes may be rounded off to the nearest pipe size of a recognised standard, but d b is in no case to be less than 25 mm.

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