Carbon steel pipe can withstand high pressure, can resist high temperature, used for transporting steam, compressed air, inert gas body, gas, natural gas, hydrogen, oxygen, acetylene, ammonia, liquid ammonia, water, oil and other media.
Since the carbon steel has a certain corrosion resistance, so carbon steel pipe can be used to transport at room temperature alkali solution and corrosion medium "after heat treatment to eliminate welding stress force, carbon steel pipe can also be used to transport the caustic]. The carbon steel pipe can also be used for conveying other corrosive media, such as the lining of the corrosion resistant coating, or the corrosion resistant material lining, such as lead and rubber.
2 low alloy steel tube
Low alloy steel pipe is generally made of pearlite heat resistant steel, which is characterized by high strength and heat resistance, and has a certain resistance to corrosion.
(1) has good mechanical properties and processing properties of 16Mn, using a temperature of 40 ~ 475 DEG C, good weldability, welding at ambient temperature generally without preheating, needs no heat treatment after welding, 16Mn steel yield strength ratio of about 20 high-quality carbon steel is as high as 30%, the corrosion resistance of also more than 20 steel. It is mainly used in medium high pressure pipe and vessel.
(2) 15CrMo and 12CrMo have sufficient creep strength and antioxidant capacity, so the heat resistance is good, and has a certain anti - sulfur effect. 12CrMo steel using temperature 350 ~ 450 DEG C, 15CrMo steel using 350 ~ 560 DEG C temperature. Their cold processing performance is good, cold and hot bending, but after bending need by 850 ~ 900 Deg. C normalizing treatment; welding performance is good, but before welding should be preheated and after welding to heat treatment. Mainly used for conveying high temperature and high pressure steam medium and medium temperature and medium pressure medium (such as semi water gas, hydrogen gas, etc.) and high temperature oil and gas.
(3) due to the presence of vanadium and improving the stability of the organization, the heat resistance is higher than that of 12CrMo and 15CrMo and make the temperature of 350 ~ 580 DEG C, 12CrMoV steel machining performance and welding performance and 12CrMo similar, manual electric arc welding E5515-B2-V welding rod, welding should be preheated to 250 ~ 350 DEG C, backward welding line 730 ~ 760 DEG C tempering treatment. Manual gas welding using H08CrMoV welding wire, welding after 1000 and 740 ~ 760 DEG C normalizing and tempering. Mainly used for conveying high temperature high pressure steam medium.
My company's wear resistant ceramic pipe is in the inner lining of the carbon steel tube, which is the final material in the transmission of wear and tear is ceramic, so long life, and some can be used for more than ten years, especially in the power plant, cement, chemical and other enterprises.
Wear resistant ceramic pipe is also divided into two kinds of one is the overall ceramic pipe, one is the placement of ceramic pipe, can be selected according to the material delivery.