OIL-RESISTANT PIPE GASKETS

May 4, 2017

Nitrile Butadiene Rubber (NBR), also known as Buna-N, and neoprene, a synthetic rubber made from chloroprene, are the materials of choice when looking for oil-resistant pipe gaskets. The additional physical properties these rubber compounds require to achieve oil resistance have major impacts on the compounding, processing, and shelf life of the gasket—which, in turn, have major impacts on availability, cost, and installation.

Pipe Gaskets & Manhole Connectors

Neoprene/nitrile rubber compounds provide the best possible resistance to oils, greases, and waxes in a variety of applications. They also help prevent material breakdown from oxidation, ozone, and weathering. Plus, they’re resistant to water immersion.

At Press-Seal, we find that the majority of our 4G nitrile gaskets and PSX: Direct Drive Nitrile manhole connectors is utilized for oil resistance. Typically implemented in outdoor applications and known for their high resistance to chemicals, these gaskets and connectors feature compounds that are also manufactured for:

Service stations
Petroleum storage terminals
Refineries
Truck stops
Car/truck washes

Selecting a Pipe Gasket Compound

Concrete pipe gaskets utilize several types of rubber compounds, and selection of the proper compound depends on the specific application. Review the chart below to discover best qualities of neoprene and nitrile that make them such sought-after gasket compounds.

Characteristics	Neoprene	Nitrile
Oil Resistance	Good oil resistance	Excellent oil resistance
Physical Properties	3,000 psi (20 MPa) max tensile strength 800% max elongation Good compression set	3,000 psi max tensile strength 600% max elongation Good compression set
Environmental Properties	Good–excellent flame resistivity Good gas impermeability Good impact resistance Good abrasion resistance Good tear resistance 225 degrees Fahrenheit (107 degrees Celsius) max continuous temp 300 degrees Fahrenheit (149 degrees Celsius) max intermittent temp 0 degrees Fahrenheit (-18 degrees Celsius) stiffening point temp -50 degrees Fahrenheit (-46 degrees Celsius) brittle point temp Excellent weatherability Fair–good oxidation resistance Good ozone resistance	Good–excellent gas impermeability Good impact resistance Excellent abrasion resistance Good tear resistance 200 degrees Fahrenheit (93 degrees Celsius) max continuous temp 300 degrees Fahrenheit max intermittent temp 0 degrees Fahrenheit stiffening point temp -50 degrees Fahrenheit brittle point temp Good weatherability Fair–good oxidation resistance
Immersion Properties	Excellent alcohol immersion Good transmission fluid immersion Good water immersion	Good–excellent unleaded gasoline immersion Good–excellent ethyl immersion Excellent alcohol immersion Excellent transmission fluid immersion Good–excellent water immersion

Oil-Resistant Gaskets from Press-Seal

Does your project require oil-resistant gaskets? We can help! Reach out to us toll free at (800) 348-7325 or locally at (260) 436-0521.

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