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Flange
A mechanical piece used to join other pieces, not permanently, with the use of screws or nuts.
Type of flange:
Depending on the support surface 
▪ flat
▪ joggled
▪ simple insertion type
▪ double insertion type
Depending on how it is fixed to the pipe 
▪ to be lap welded
▪ to be butt welded
▪ to be pocket welded
▪ with support ring
▪ threaded
▪ blind

Flow rate
The quantity of liquid to be pumped, transferred or raised in a given period of time: it is expressed in liters per second (l/s), liters per minute (l/m) or cubic meters per hour (m³/h). Symbol: Q.

FPM (FLUORINATED ELASTOMER) (i.e.: VITON®)
APPLICATION
This elastomer’s considerable resistance to heat and chemical agents has improved the performance of some parts for automobiles, airplanes and industrial equipment. With its use, it is possible to supply the industrial sector with items such as seals, o-rings, diaphragms, coatings, rubberized fabrics, pipes and a large variety of special items which can be used in an extremely wide range of conditions.
RESISTANCE TO OILS, GREASES AND OTHER CHEMICAL AGENTS
The performance of the fluorinated elastomer when in contact with fuels, oils, solvents and chemical agents is unequalled by any other synthetic rubber. It is also highly resistant to lubricants, the majority of mineral acids and many aliphatic and aromatic hydrocarbons, such as carbon tetrachloride, toluene, benzol and xylene.