Double roll welded pipe

Double roll welded pipe is made of copper plated steel strip by the unique and copper brazing technology of rolling production for a high precision steel tubes. It is plated with a layer of soldering material than steel with low melting point (generally for copper strip), after cold bending forming machine into double roll tube welding tube, again through the special heating device, the interlayer welded to form a double roll of welded pipe.

Double roll welded pipe have been widely used in many parts automotive brake systems and fuel delivery pipe, carburetor public electricity box compressors, heat exchangers, condensers, and pneumatic machinery, agricultural irrigation pipe. Double coil pipe is generally used as a raw material, copper welding knot media from the role in order to ensure a strong leak-proof steel. Other types of coatings can also be used to double the volume pipe, such as zinc, nickel, tin, hinged blessing, chrome and so on. In general, the production of double-roll pipe manufacturers have built a dense monolayer of thin-walled welded pipe mill love to double, single pipe for different purposes, with each other fair use. In other countries, the production of single-precision thin-walled pipe to use more advanced DC welding or rectangular wave soldering.

Double roll welded pipe combines the advantages of seamless pipe with high strength and welded pipe with high precision, while a certain extent, make up for their shortcomings. Double roll pipe has several advantages as follows:

(1) with anti-vibration and high pressure rupture properties, its vibration fatigue resistance 2-3 times higher than copper or aluminum tube.

(2) has good processing properties, can be bent to a small radius.

(3) high dimensional accuracy and good surface quality.

(4) relatively inexpensive.