Page 50 - International safety guide for oil tankers and terminals

INTERNATIONAL SAFETY GUIDE FOR OIL TANKERS AND TERMINALS

draining to open containments and mopping up spills if H 2 S
concentrations could exceed the TLV-TWA.
---ใช้เพื่อการศึกษาเท่านั้น---
Passive sampling badges provide an immediate visual indication of when
a specific chemical hazard is detected or when an established safe
Devices (EEBD) to personnel working in hazardous areas. These are veryย์นาวี
exposure level to such a chemical is exceeded. They should only be used
for industrial hygiene purposes such as area sampling and for
determining exposure of personnel over a period of time. They should
never be used as an item of personal protective equipment.

Personal Protective Equipment (PPE)
Procedures should be defined for the use of respiratory protective
equipment when concentrations of vapour may be expected to exceed
the TLV-TWA (5 ppm by volume in air).

Consideration should be given to providing Emergency Escape Breathing

portable and can be donned quickly should gas be detected.

Personnel should be required to wear respiratory equipment under the
following circumstances:
Whenever they are at risk of being exposed to H 2 S vapours in excess
of the TLV-TWA.
When TLV-TWAs specified by national or international authorities are
exceeded or are likely to be exceeded. ึ

When monitoring cannot be carried out.
When closed operations cannot be conducted for any reason and H 2 S
งสมุด ศูนย์ฝกพาณิช
concentrations could exceed the TLV-TWA.
Company and Terminal Procedures
The tanker’s Safety Management System (SMS) and the terminal’s
Operations Manual should contain instructions and procedures to ensure
safe operations when handling cargo and bunker fuels that are likely to
contain H 2 S. The functional requirements should include, but not be
limited to, the following:
Training of all crew members in the hazards associated with H 2 S and
the precautions to be taken to reduce the risks to acceptable levels.
งานห้อ Maintenance procedures for cargo related systems.
Safe operating procedures for all operations.

Gas testing/atmosphere monitoring procedures.

PPE requirements.
Contingency planning.
Emergency response measures.
Measures to protect visitors from exposure.

2.3.6.5 Additional Procedures when Handling Cargoes with
Very High Concentrations of H S
2
Companies and terminals should develop additional procedures for use
when handling cargoes with very high levels of H 2 S. (100 ppm in the
vapour space is considered to be a reasonable threshold.)

16 © ICS/OCIMF/IAPH 2006