Bellows plays a protective role for pipelines such as pumps and valves

Corrugated pipe lifting, should use special lifting tools, such as sling, special chuck number. Prohibit the use of steel wire rope to prevent scratching the appearance; and in lifting and placing, should prevent the impact of bumping to form scratches. Check the welding materials and equipment before welding. The quality of the produced bellows check, of course, also contains the general said: the first three checks, the production process should also check the bellows by branch to ensure product quality.
 
Choose the power source with straight external characteristics, DC when the choice of positive generally suitable for welding of thin plates below 6mm, with beautiful weld seam formation, welding deformation of small characteristics. In order to avoid the presentation of welding porosity, welding parts such as rust, oil and other finishing clean. Welding arc length, welding general steel, to 2 ~ 4mm is good, and welding corrugated pipe, to ~ 3mm is good, too long is not good maintenance effect. Butt priming, in order to avoid the reverse side of the bottom welding channel is oxidized, the reverse side also needs to implement gas maintenance. In order to make the argon gas well maintained welding pool, and facilitate the welding operation, tungsten line and welding workpiece should generally adhere to 80 ~ 85 ° angle, filler wire and workpiece appearance angle should be as small as possible.
Bellows flux cored wire welding key and attention, the use of flat characteristics of the welding power, DC welding, the choice of inverse. The use of general CO2 welding machine can be applied, but the pressure of the wire feed wheel please adjust slightly loose. Arc length, bellows MIG welding, generally in the eruption transition conditions down to welding, the voltage should be adjusted to the arc length of 4-6mm.
The corrugated pipe is formed on the corrugated pipe forming machine by laminating the corrugated pipe plate through several passes and by welding. Because of the high strength of the bellows, and its structure is face-centered cubic lattice, easy to constitute process hardening, so that the bellows forming: on the one hand, to accept the larger friction, so that simple wear; on the other hand, the bellows plate material is easy to form a bond with the appearance, so that the bellows and the appearance of strains. Our analysis of imported bellows shows that the appearance of this type of treatment is the choice of super-hard metal carbide or nitride cladding treatment.