APPENDIX 3: DESIGN AND CONSTRUCTION OF VESSELS AND BARGES

1. Introduction

As there is a considerable variety in the existing design of vessels and barges for styrene movements, each vessel/barge should be inspected prior to contracting and should conform to a checklist compiled from specific design requirements.

General Recommendations

In addition to the relevant IMO and ADNR requirements vessels and barges should have:

• Vapour return facilities.
• A closed ullage system and a system for overfill protection including an automatic alarm.
• Efficient stripping facilities.
• Double hull
• A communication system
• Stainless Steel preferred, otherwise lined mild steel (zinc silicate lining or Teflon coated)

For new vessels and barges, a computer system to control/measure tank contents on board is recommended.

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