Custom Marine Tanks LLC
USCG Compliance Guide
(A) EACH FUEL TANK SUPPORT, CHOCK, OR STRAP THAT IS NOT INTERGRAL WITH A METALLIC FUEL TANK MUST BE INSULATED FROM THE TANK SURFACE BY A NON-MOISTURE ABSORBING MATERIAL.
Unless a metallic fuel tanks has built-in means for supporting and holding the fuel tank in place, a non-moisture absorbing material must be between the fuel tank surface and the support, chock, or strap. The non-moisture absorbing quality of the material is necessary to prevent localized corrosion of the fuel tank that might occur if moisture was trapped at the support-tank interface for a prolong period of time.
The following table lists some material that appear to be suitable and some that should be avoided. Care should be taken to avoid abrasive combination of materials even though it is not a mandated requirement.
Basically, this requirement provides for the isolation of the metallic fuel tank from potentially moisture ladden support system and also from abrasion by the supports, chock, or strap.
FUEL TANK ISOLATION MATERIALS
NOTE: This list is not limited to the material to be included. They are to establish the intent of the regulatory requirements prohibiting moisture absorbing materials.
Coast Guard, DOT
§183.550 Fuel tanks: Installation
Each fuel tank must not be integral with any boat structure or mounted
on an engine.
Custom Marine Tanks
is not responsible for the installation of tanks. This document is
posted for your information out of The Coast Guard Code of