Section 4 Auxiliaries and Piping Arrangement

401. Pressure pipes and pipe connections

1. Strength of the pipes subjected to the internal pressure is to be in accordance with the require- ments in Pt 5, Ch 6, 102. 6 of Rules for the Classification of Steel Ships. Direct connection of pipe lengths and connection of pipes with flanges are to be in accordance with the requirement in Pt 5, Ch 6, 104. 1, 2 and 3 of Rules for the Classification of Steel Ships.

2. Pt 5, Ch 6, 102. 6 of Rules for the Classification of Steel Ships, minimum wall thickness for steel pipe (only for scupper pipes and exposed portions of air pipes which terminate above the freeboard deck or superstructure deck), are to be applied to the barges complying with ILLC(Internal Load Line Convention).

406.

Air pipes, overflow pipes and sounding devices

1. The requirements in 401. 2 of the Guidance apply to the minimum thickness of air pipes of barges complying with ICLL.

2. The “particular compartment” referred to in 406. 5 of the Rules is small watertight compartment where a manhole is provided at an easily accessible position on the upper deck or other similar decks, or each watertight compartment where a manhole is provided at an easily accessible position on the upper deck or other similar decks for pontoon type cargo barges which are divided into many watertight compartments.

407.

Bilge systems

1. The "particular compartment" referred to in 407. 1 of the

2 of the Guidance.

Rules is compartment referred to in 406.

2. The capacity of the power bilge pumps specified in 407.

tained from the following formula, even where one of the

3 of Rules is not to be less pumps becomes out of use.

than Q ob-

Q = 5.66d2 × 10- 3 (m Į/h)

d = 1.68Ρ̓ L (B + D ) + 25 (mm)

3. The diameter of the bucket cylinder of the manual bilge pump is not to be less than ᾘ′ obtained

from the following formula.

d' =

lBD

142

+ 100 (mm)

ᾘ′ : The diameter of the bucket cylinder (mm)

ᾨ : Length of the compartment to be drained by the manual pump (m)

4. The compartment referred to in the above 1 may be considered as being provided with suitable drainage means specified in 407. 13 of the Rules.

408. Scuppers

The requirements in 401. 2 of the guidance are applied to the minimum thickness of scuppers of barges complying with ICLL.