The following guidelines have been developed to describe possible equipment options for storage tank systems intended for diisocyanate product service, specifically Monomeric Methylene Diphenyl Diisocyanate (MMDI), Polymeric Methylene Diphenyl Diisocyanate (PMDI) and Toluene Diisocyanate (TDI). Each item on this reference table is more fully described in the subsequent text. This reference table is not meant to be all-inclusive and may not cover all the legal requirements for storage tanks at a particular facility or operation. Consult your supplier for additional information. Consider each item and refer to the accompanying text for discussion. Use of this reference table is not a substitute for the thorough review of the equipment guidelines for diisocyanate storage tanks found in the body of this document.