Page 211 - International safety guide for oil tankers and terminals

SHIPBOARD OPERATIONS

---ใช้เพื่อการศึกษาเท่านั้น---
All dimensions are in millimetres
Stud perpendicular to
presentation flanges
งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี

25.4

50

500

800
yellow
100 100
red red

16 mm diameter hole in inboard end of reducer
and in hose flange to accept stud
12.7 mm diameter stud ึ
at 12 o’clock position
on presentation
flange

VAPOUR to be stencilled
on side at 10 o’clock and
2 o’clock positions

Figure 11.3 – Vapour manifold presentation flanges, orientation and labelling

conditions. However, owing to the reliance placed on closed
gauging systems, it is important that they are fully operational and
that backup is provided in the form of an independent overfill
alarm arrangement. The alarm should provide audible and visual
indication and should be set at a level that will enable operations
to be shut down prior to the tank being overfilled. Under normal
operations, the cargo tank should not be filled higher than the
level at which the overfill alarm is set.

Individual overfill alarms should be tested at the tank to ensure
their proper operation prior to commencing loading, unless the
system is provided with an electronic self-testing capability which
monitors the condition of the alarm circuitry and sensor, and
confirms the instrument set point.

© ICS/OCIMF/IAPH 2006 177