1. Hot-rolled process can significantly reduce consumption, reduce costs
Where it can be hot-rolled billet should be hot-rolled metal, because metal hot deformation resistance than cold-rolled low, can significantly reduce energy consumption during rolling.Normally, the finished products of hot-rolled seamless steel pipe in price is lower than cold-drawn seamless steel pipe.
2. The hot rolling process can improve the performance of metals and alloys
Because coarse grains of hot-rolled state can cast broken, microcracks healing and reduce or eliminate casting defects, converting low ductility cast structure into a higher plastic deformation of tissue.
Steel is considered to be carbon steel when no minimum content is specified or required for chromium, cobalt, niobium, molybdenum, nickel, titanium, tungsten, vanadium or zirconium, or any other element to be added to obtain a desired alloying effect; when the specified minimum for copper does not exceed 0.40 percent; or when the maximum content specified for any of the following elements does not exceed the percentages noted: manganese 1.65, silicon 0.60, copper 0.60.
Different types of carbon steel pipes
Classes of carbon steel Carbon content %
Ultra-high carbon steel 1.00 – 2.00
High carbon steel 0.60 – 0.99
Medium carbon steel 0.30 – 0.59
Low carbon steel 0.16 – 0.29
Mild carbon steel 0.05 – 0.15
Black steel pipe is uncoated and made without steam, and therefore, it is widely used for transporting gas like propane and natural gas to residential and commercial building. Black steel pipe is manufactured as seamless pipe which makes it a better type for gas transportation. It can be used for fire sprinkler system since it can prevent fire better than galvanized pipe. Since it has a dark color surface that is form by iron oxide during the
