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Low Compression Set Fluorcarbon Uncured Compound Used In Gas Tube Sealing
Five common rubber materials are used in oil and gas industry :NBR rubber, HNBR rubber, FKM rubber, Alfas Rubber, and Propylene copolymer and FFKM rubber.
Natural gas main components are: most methane, small amount of ethane and propane and butane.
Fluorine rubber copolymer and terpolymer type have good resistance to the butane and Methane and Propane that means fluoro rubber also have good resistance of the natural gas.
Fluororubber is a kind of polymer. It has particularly excellent performance and is widely used in the production of special sealing products. In the pipeline and joint of natural gas products, fluorogum O-type Square-type sealing ring is also widely used.
Natural gas is a combustible gas mixture consisting mainly of (CH4) hydrocarbon gases. There are three main forms of existence:
1. Ordinary natural gas refers to natural gas at room temperature and pressure with a relative density of 0.59. Under standard conditions (101325Pa, 0℃), the density of natural gas mixture is 0.71 Kg/m3 and the air density is 1.29 Kg/m3, and the relative density is the ratio of the two.
2. Compressed natural gas (CNG) refers to natural gas with a pressure of more than 20MPa and a general pressure of 25MPa. It is an ideal vehicle fuel.
3. Liquefied natural gas (LNG) refers to the natural gas that is transformed into a liquid state. Under normal pressure, the temperature is cooled to -162℃. From gas to liquid if cooled to -140℃ at 20MP.
| Batch: | 20070202 | Colour: | Red | |||||
| Press Cure: | 170℃*10min | Post Cure: | 230℃*24h | |||||
| Room Temperature: | 23 | Humidity: | 55% | |||||
| Test Item | Test Result | Test Method | ||||||
| Test Condition : Temperture :177℃ Time:600 Sec | ||||||||
| (TS2)Scorch time,Ts2,sec | 1:05 | ASTM D1646 | ||||||
| (TC10)Scorch time,Tc10,sec | 0:56 | ASTM D1646 | ||||||
| (TC90)Time to 90%cure,t'90,sec | 2:20 | ASTM D1646 | ||||||
| (ML)Minimum torque,ML,dN-m | 3.45 | ASTM D1646 | ||||||
| (MH)Maximum torque,MH,dN-m | 16.42 | ASTM D1646 | ||||||
| Typical Properties Test: | ||||||||
| Hardness Shore A | 73 | ASTM D2240 | ||||||
| Tensile strength(MPa) | 12.8 | ASTM D412,Die C | ||||||
| Elongation(%) | 251 | ASTM D412,Die C | ||||||
| compression set,24h at 175℃(%) | 23.1 | ASTM D395 | ||||||
| Astm No.3 Oil Resistance,70h at 150℃ | ||||||||
| ,change in Volume,% | 1.45 | ASTM D471 | ||||||
| Heat Aging,70h at 275℃ | ||||||||
| Change in hardness,pts | 3 | ASTM D2240 | ||||||
| Change in tensile,% | 5 | ASTM D412,Die C | ||||||
| Change in elongation,% | -12 | ASTM D412,Die C | ||||||
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