Rubber selection can be intimidating as there are a number of engineered high performance linings which can have several different applications. I will list a few different elastomers and durometers as a general guideline.
There can be many different formulations of the compounds listed below with different physical properties than what is listed.
Soft Natural Rubber, 30-60 Duro Shore A, Temp Limit 160 Deg F, Resistance to Hydrocarbons Poor
Typical Uses: Acid Storage depending on concentration, Transportation equipment, Abrasive Services, Sulphur dioxide scrubbers.
Semi Hard Natural Rubber, 80-85 Duro Shore A, Temp Limit 180 Deg F, Resistance to Hydrocarbons-Fair
Typical Uses: Chemical Processing and Plating
Hard Natural Rubber, 90-100 Duro Shore A, Temp Limit 200 Deg F, Resistance to Hydrocarbons-Fair
Typical Uses: Chemical Processing, High temperature nickel-copper plating, steel pickling, vacuum service.
Graphite Loaded Hard Rubber, 90-100 Duro Shore A, Temp Limit 212 Deg F, Resistance to Hydrocarbons-Fair
Typical Uses: Special lining for wet chlorine gas, in chlorine cells and associated equipment. High wear applications.
Three-ply (Soft, Hard, Soft) 40-50 Duro Shore A, Temp Limit 230 Deg F, Resistance to Hydrocarbons-Fair
Typical Uses:Steel pickling lines, Phosphoric Acid
Neoprene 40-70 Duro Shore A, Temp Limit 230 Deg F, Resistance to Hydrocarbons-Very Good
Typical Uses: Chemical or abrasive services with oil present, best for strong bases, good weather resistance, fire retardant.
Nitrile, 60-90 Duro Shore A, Temp Limits 200 Deg F, Resistance to Hydrocarbons-Excellent
Typical Uses: Aliphatic hydrocarbons, kerosene, animal, vegetable and mineral oils.
Butyl, 50-75 Duro Shore A, Temp Limits 225 Deg F, Resistance to Hydrocarbons-Fair
Typical Uses: Oxidizing acids, 70 percent hydrofluoric acids, super phosphoric acid, best water resistance, good for alternative service.
Chlorobutyl, 40-60 Duro Shore A, Temp Limits 200 Deg F, Resistance to Hydrocarbons-Fair
Typical Uses: Much the same as butyl but easier to apply and faster curing, sulfur dioxide scrubbers.
EPDM, 40-60 Duro Shore A, Temp Limits 180 Deg F, Resistance to Hydrocarbons-Poor
Typical Uses: Hypochlorite bleach, ozone and weather resistant.
Feel free to ask about applications and we can suggest compounds.
Dear Sir,
Thank you for this article. Am looking for more information on elastomeric lined pipes for slurry applications; looking for information on what’s offered in the market, general price ranges, how the different type of linings compare in performance – etc. Any assistance in finding this information is greatly appreciated.
John
75% of the lining sold for slurry application is Natural Rubber 40 Durometer in either 1/4″ thick or 1/2″ thick. 1/4″ usually for 8″ dia pipe and below and 1/2″ for anything larger. 40 Duro natural rubber is by far the least expensive of the linings.