The COA is committed to safe and reliable container operations and works with Flexitank manufacturers and operators to implement the COA Code of Practice.

The Code of Practice requires that the flexitank manufacturer complies with the COA quality management system and submits to independent quality audits and tests of the flexitank.

On satisfactory completion of the audits and tests, the manufacturer achieves the COA Certificate of Quality Compliance.

The COA Flexitank Quality Management List (FQML) provides a list of flexitank manufacturers and operators that have been awarded the COA Certificate of Quality Compliance.

Compliance with the Code of Practice forms part of the shipping line (carriers) risk assessment process when transporting container flexitank systems.

A flexitank is a large bladder with valve(s) that is designed to fit inside a general-purpose freight container and operates as part of a system which includes the container, flexitank, its fittings and restraining system.

The flexitank is designed for single-use transport of compatible liquids that classified as non-dangerous goods i.e. goods that are not classified or regulated as dangerous goods in accordance with the IMDG Code.

Flexitanks can be constructed from polyethylene, polyethylene blends and polyvinyl chloride, but other materials can also be used.

The freight containers used are usually ISO dry freight 20 ft general purpose units (ISO code GP22).

The Code of Practice requires a maximum payload of 24000 kg and 24000 litres.

Transport is additionally subject to the provisions of the IMO/ILO/UNECE Code of Practice for Packing of Cargo Transport Units (CTU Code).

The use of flexitank systems (flexitanks fitted within an ISO container) for the transport of non-regulated (non-dangerous) liquids has grown substantially in recent years. It is estimated that more than 900,000 flexitanks will be transported in 2019

Upcoming Flexitank Events

COA Flexitank Meeting
Sofitel Hotel, Hamburg
Tuesday 5 November 2019


Previous Flexitank Events

12th COA Flexitank Meeting – Amsterdam

12th COA Flexitank Meeting – Amsterdam

Event location - Hyatt Place Hotel, Amsterdam

Event date - 20160629

June 2015: 11th COA Flexitank Meeting

Event location - Hamburg

Event date - 20150616

Event date end - 20150616

May 2013: 9th COA Flexitank Meeting

Event location - London

Event date - 20130523

Event date end - 20130523

COA 2019 Flexitank meeting

COA 2019 Flexitank meeting

Event location - Qingdao, China

Event date - 20190524