Spiral tube, also known as spiral steel pipe and spiral welded pipe, is of low carbon steel or low-alloy structural steel according to certain of the Helix angle (angle) rolled up into tubes and pipes made of welded, it can use a narrow strip of large diameter steel pipe.
Also known as the spiral tube or spiral. Spiral tube's diameter is about 30 NM, diameter of about 10 nm, adjacent screw spacing is approximately 11 NM. Spiral pipe per 1 week consists of 6 nucleosomes to form H1 histone in spiral pipe inner surface of the cavity to maintain the spiral structure plays an important role. Composed of nucleosomes 10 nm 30 nm fiber fiber spiral formation, further compression of the DNA length 6 times.
Spiral tubes are mainly used for oil and gas pipelines, its specification represented by the * outer diameter wall thickness. Single face welding and double-sided spiral pipe welding, pipe shall ensure the water pressure test, tensile strength and bending performance of compliance.