Chemical Compatibility Chart

The general elastomer and metal chemical compatibility resistance chart below is intended to be used to aide in the selection of seal materials most suitable for customer applications. The chemicals listed are only a representative sample of products commonly used in the petrochemical industry. For chemical compatibility information not listed in this chart, please contact an HMT representative.


General Elastomer and Metal Chemical Compatibility Resistance Chart

Chemical Urethane
Petrolon CSM3
Viton A
PTFE (Teflon®) PVC GRP or GRP w/TPL*** Aluminum 201/304/316
Stainless Steel
Galvanized Steel
Acetone N N N Y/N N Y NY Y Y/Y/Y Y
Acetyl Bromide N N N --/-- -- Y NY*** -- -- --
Acetyl Chloride N N N N/N Y Y NY N Y*/Y/Y --
Acrylonitrile N N N N/NN Y NY Y Y/Y/Y Y
Allyl Chloride N N Y  --/--Y Y NY N --/Y/Y --
ASTM Fuel C Y* N Y*  N/NY Y NY Y Y/Y/Y Y
ASTM Oil #1 Y Y Y Y/YY Y  Y*Y Y Y/Y/Y Y
ASTM Oil #2 Y Y Y Y/YY Y  --Y Y Y/Y/Y Y
ASTM Oil #3 Y Y Y N/N Y Y NY Y Y/Y/Y Y
Alcohol - Ethyl N Y Y Y/YY Y NY Y/Y/Y N
Alcohol - Methyl N Y Y Y/Y N Y YY N Y/Y/Y N
Aviation Gasoline Y N Y  N/NY Y  NY Y Y/Y/Y N**
Benzene N N N  N/NY Y  NY Y Y/Y/Y N
Butyl Acetate N N N  Y/NN Y  NY Y Y/Y/Y Y
Crude Oil (Sour) Y Y* Y Y/Y  Y Y  Y*Y Y N/Y/Y Y1
Crude Oil (Sweet) Y Y* Y Y/Y Y Y  Y*Y Y Y/Y/Y Y
Cyclohexane Y N Y N/N Y Y  NY Y Y*/Y/Y Y
Diesel Oil Y* Y* Y N/N Y Y  NY Y Y/Y/Y N**
Ethylene Glycol Y Y Y Y/YY Y YY N Y/Y/Y N
Gasoline Y Y* Y Y/N Y Y  Y*Y Y Y/Y/Y N**
Heptane Y N Y  Y/NY Y  NY Y Y/Y/Y Y
Hexane Y Y Y Y/YY Y  NY Y Y/Y/Y Y
Isooctane Y Y Y Y/YY Y  Y*Y Y Y/Y/Y Y
Jet Fuels Y N Y N/NY Y  NY Y Y/Y/Y N**
Kerosene Y Y Y  Y/NY Y YY Y Y/Y/Y Y
MTBE Y* N Y*  --/--N Y  --Y Y Y/Y/Y Y
Methyl Ethyl Ketone N N N  Y/NN Y  NY Y Y/Y/Y Y
Naphtha Y* N Y  Y/NY Y  NY Y Y/Y/Y Y
Pentane N Y Y Y/YY Y  NY Y Y/Y*/Y* Y
Propylene Glycol Y Y Y Y/YY Y  Y*Y Y Y/Y/Y Y
Toluene Y* N N  N/NY Y  NY Y Y/Y/Y Y
Vinyl Acetate N N N  --/--N Y  NY*** Y Y*/Y/Y Y
Xylene N N N N/N Y Y  NY Y Y/Y/Y Y

-- Insufficient data available

* Reduced service life can be expected when this material is exposed to certain types, grades, or concentrations of this chemical. Actual service life will depend on the proximity of the material to the product, concentration of the chemical and temperature of the service environment. Materials in direct contact with the stored product or exposed to concentrated vapors may have a shorter life than materials exposed to air containing varying amounts of the product vapors.

** Do not use galvanized steel for aviation fuels, diesel fuel or gasoline that contains Ethanol.

***HMT Tanksystems has resins and surface laminates for virtually every chemical that can be placed in an aboveground storage tank. Items marked with a triple asterisk (***) will require a Thermoplastic Liner (TPL). See HMT Tanksystems for information.

ⱡ  The corrosive properties of aluminum that is in submerged contact with ethanol are highly varied. The leading cause of corrosion according to material experts is galvanic corrosion due to the fact that ethanol is an electrically conductive liquid. Other experts contend that the corrosion rate may also be affected by concentration, moisture content, residence time and microbial content of the stored product. HMT recommends stainless steel (for the wetted parts) or GRP materials if the tank owner wishes to completely eliminate the potential for premature tank outages due to corrosion of the floating roof. However, some tank owners have installed aluminum floating roofs in ethanol service without significant problems. While HMT recommends aluminum / stainless steel hybrid or GRP IFR's for ethanol service, it is the tank owner’s prerogative to use an all-aluminum IFR if historical records indicate it is a suitable material for his specific application.

Note 1: The zinc coating on galvanized steel parts is resistant to wet H2S but the carbon steel base metal can corrode rapidly when unprotected.

Note 2: The above guidelines were compiled from data believed to be accurate. However, due to unique environmental conditions and contaminations, these recommendations are guidelines only.

Note 3: Petrolon is available in CSM/CSM, CSM/NBR & NBR/NBR laminations.

Teflon® and Viton® are a registered trademarks of DuPont.