Steel tubes for precision application
|Product applied standard||EN 10305|
|Finished products package||Steel belt hexagonal package/plastic film/woven bag/sling package|
Product Manufacturing Process
Inspection (spectral detection, surface inspection, and dimensional inspection)
Cold-drawing (the addition of cycled processes such as heat treatment, pickling and cold drawing should be subject to the specific specifications)
Cold drawing/hard +C or cold drawing/soft +LC or cold drawing and stress relieved +SR or annealing +A or normalization +N (selected according to customer’s needs)
Performance test (mechanical property, impact property, flattening, and flaring)
Immersion of anti-corrosive oil
Product Manufacturing Equipment
Shearing machine/sawing machine, walking beam furnace, perforator, high-precision cold-drawing machine, heat-treated furnace, and straightening machine
Product Testing Equipment
Outside micrometer, tube micrometer, dial bore gage, vernier caliper, chemical composition detector, spectral detector, tensile testing machine, Rockwell hardness tester, impact testing machine, eddy current flaw detector, ultrasonic flaw detector, and hydrostatic testing machine
Chemical equipment, ships, pipelines, automotive parts, and mechanical design applications
Seamless steel pipe
Seamless steel pipe (SMLS) is formed by drawing a solid billet over a piercing rod to create the hollow shell, without welding or seam. It is suitable for bending and flanging. The most advantage is increasing the ability of withstanding higher pressure. So it is widely used for boiler and pressure vessel, automotive area, oil well, and equipment components.
Seamless steel pipe can be cut, threaded or grooved. And the coating method includes black / red lacquer, varnish painting, hot dip galvanization, etc.
Cold Drawn Mill：
Cold drawn mill is used for producing small size pipe. There are several times of cold forming process, so yield strength and tensile strength values increase, while elongation and toughness values decrease. A heat treatment must to be applied for each cold forming operation.
Comparing hot rolled pipe, cold drawn pipe maintains precise dimension, smooth surface and shining appearance.
Package of carbon steel seamless pipe
Plastic caps plugged at the two sides of pipe ends
Should be avoided by the steel strapping and transport damage
Bundled sians should be uniform and consistent
The same bundle(batch) of steel pipe should be came from the same furnace
The steel pipe has the same furnace number,the same steel gradethe same specification