The heat exchangers PICKER are manufactured with following building materials, according to families of exchangers. This list is not exhaustive, to refer in the overall plans of the apparatuses to know the possible material combinations for a given family of exchangers. The choice of such or such material is mainly dictated by nature, the temperature and the conditions of circulation of the fluids in the exchangers.
Body
Alloys of aluminium, copper
Covers
Cast iron, bronze
Tiges centrales
Cupro-aluminium
Bundle tubes
Copper, cupro-nickel 90/10
Anodes
Zinc
O rings
Nitrile, Fluorocarbon
(“VITON”), Ethylene-propylene
Plate-tubular
Bronze
Counter-flange
Carbon steel, bronze
Flat joints
Synthetic fibres without asbestos
Baffles
Brass
Screws and bolts
Carbon steel, brass
Shaped joints
Ethylene-propylene
External protection
The heat exchangers PICKER are protected outside from corrosion by means of a reactive primary painting from colour grey. This painting, only intended to ensure the adherence of the later layers (intermediate and/or of completion), is compatible with the majority of the paintings used in industry.