MarineLine® E-Newsletters

Profitable Tanker News about Marine Cargo Tank Coatings
Issue 10
New FOSFA Standard to be Reviewed for HCP Tank Coatings

Tanker Shipping & Trade, one of the leading authorities in maritime media, published an article in its August/September 2013 issue on FOSFA’s study of highly cross-linked polymer (HCP) coatings. Tanker Shipping & TradeWith permission from the publisher, Advanced Polymer Coatings reprints this article below to provide you with background on this significant development.


New protocols for HCP tank coatings

New FOSFA StandardDiscussions have been ongoing for a number of years between the Federation of Oils, Seeds and Fats Association (FOSFA) and the tank coating industry about whether highly cross-linked polymer (HCP) coatings, such as Advanced Polymer Coating’s MarineLine and International Paint’s Interline 9001, should be regarded in the same way as stainless steel in respect of styrene monomer and ethylene dichloride (EDC) as last cargoes, reports the summer issue of the International Parcel Tankers Association member newsletter.

There is a restriction at the end of FOSFA’s banned and acceptable last cargo lists stating that EDC and styrene monomer shall not be carried as the three previous cargoes in organic coated tanks, or as the last cargo in stainless steel and inorganic coated tanks.

The manufacturers claim that the adsorption and desorption properties of these paints is far superior to those of standard phenolic epoxy resins, and that they are technically equivalent to stainless steel. The manufacturers have presented the results of research to the FOSFA technical committee with the request that FOSFA treat such coatings as inorganic with respect to last cargo restrictions.

The FOSFA technical committee has agreed that a new criterion should be defined, based on the performance of a coating with respect to absorption, desorption and retention of (ADR) properties, and has developed a protocol and analytical maximum for the testing of these coatings. It is intended that coating manufacturers will follow this protocol for new materials in order to be able to demonstrate that any contamination carried over is below the required amount. The oils and fats committee will therefore be asked when it meets in September to consider amending the restriction to read: “Ethylene dichloride and styrene monomer shall not be carried as the three previous cargoes in organic coated tanks, or as the last cargo in stainless steel and inorganic or certain highly cross-linked polymer coating tanks.”

At the same time it is pointed out that these materials are still coatings and, if poorly applied, used or maintained, may have the same problems as other coatings; for example, blistering, cracking and peeling. It is the role of the superintendent to check the suitability of the tanks to receive their cargo, as it is for all coated tanks.


APC has provided a number of independent and positive tests to FOSFA in this regard from Dr. Verwey Labs, MarinSpec Associates, and onboard ship cargo tank testing.

It should be noted that Advanced Polymer Coatings’ MarineLine® cargo tank coating is already generally recognized as GRAS safe for food grade cargoes and that the coating complies with the U.S. FDA (Federal Food, Drug and Cosmetic Act) and all applicable food additive regulations.

If you would like to learn about MarineLine® cargo tank coatings for your carriage needs, contact APC today.