Metal bellows are flexible and precise pipe connectors made of various metals with many corrugated convolutions.
As elastic vessels, metal bellows can absorb the vibration of the pipeline and the displacement caused by thermal expansion and contraction. And it can also effectively isolate the different media and pressures inside and outside the pipeline。
Because of its elastic characteristics, metal bellows have been widely used in many piping systems and have become an indispensable and important component.
Classified By Processes
Formed Bellows
Formed bellows are to press different media inside the pipe to achieve the corrugated shape. The more common methods are hydroforming and mechanical expansion forming.
Welded Bellows
Welded bellows are bellows formed by welding many individual stamped metal diaphragms with a combination of inner and outer diameters. Compared with formed bellows, it has the two outstanding advantages of large deformation and long life.
Electroformed Bellows
Electroformed bellows are to electroform a metal layer on an aluminum mandrel with the internal shape and structure of bellows, and then use chemicals to dissolve the aluminum mandrel. This method is mainly used to produce some extremely small precision bellows. The main material is nickel and nickel alloy.
Classified By Materials
Stainless Steel Bellows
Stainless Steel Bellows have good formability, toughness, weldability, corrosion resistance and non-magnetic or weak magnetic.
Brass Bellows
Brass Bellows has good ductility and high corrosion resistance, but it is easy to crack due to excessive stress.
Bronze Bellows
Bronze Bellows: has a little higher tensile strength, better corrosion resistance, and better conductivity than brass.
Beryllium-copper Bellows
Beryllium-copper Bellows: has good tensile strength and conductivity compared with other materials.
Monel Bellows
Monel Bellows: has very excellent corrosion resistance.
Nickel Bellows
Nickel Bellows: a hard, ductile, and ferromagnetic material.
Titanium Bellows
Titanium Bellows: as strong as steel, but weigh only half of it.
Incoloy Bellows
Incoloy Bellows: a kind of super austenitic stainless steel.
Hastelloy Bellows
Hastelloy Bellows: has good corrosion resistance and thermal stability
