Article List
- How to clean seamless steel pipeSteel pipes will rust if they are exposed for a long time. If they are buried for a long time, the surface will also be oxidized, if not cleaned. Then it will affect the normal function. In particular, 40Cr seamless steel tubes, which are generally used in important fields of industry,
- The differences of welded pipe and seamless steel pipe1. The molding process of the tube :① Welded pipe is cut from steel strip to narrow steel strip, and then wrapped into tube with die cold processing. And then a special welding seam welded pipe. The outer welds are polished. The internal burr of the ordinary welded pipe is not hit. Only the precisio
- Seamless steel tube apply in fire hydrant systemWe can often see the fire hydrant system in our daily life. And we also use this in everywhere like in building, in warehouse, in Cinema and others. But, do you know how to choose the pipe of fire hydrant system?In common condition, it used the seamless steel tube to produce,
- The difference between annealing, normalizing, tempering, and quenching of seamless steel tubes1. Annealing Heat the steel to a certain temperature and keep it warm at this temperature, and then slowly cool it to room temperature.
- What’s the difference between bearing steel and carbon steel ?What is bearing steel & carbon steel? Bearing steel: Bearing steel is used in producing ball bearing, roller bearing ring, Bearing steel has high and steady hardness and wear resistance. High elastic limitation.
- seamless steel pipe and ordinary steel pipeThe ordinary steel pipe, such as tap water pipes, It is usually welded by flat plate bending, you can find a weld above; the diameter is generally thick spiral welded seam. Seamless steel pipe is generally molten molten steel through the annular backlog out after the tensile and other processing technology molding, so there is no weld.
- What’s normalization treatmentWhat’s normalization treatment? It is also called NBK. It is one kind of heat treatment to get over stress of steel. It heats the goods under more than 30-50℃ with Ac3 or Accm. Keep the temperature some time, and cool the metal by air, sprinkle, spray or in a draught.
- Analyze Steel Tube Standard about DIN2391Today I will simply expound what is DIN2391 standard and analyze some detail information in this standard.The DIN2391 that is Germany standard specifies technical delivery conditions and dimensions about cold finished seamless precision steel tubes. Like this tube should have following requirements:
- Pickling process of seamless steel pipeDuring the rolling process of seamless steel tube, especially precision seamless steel pipe, the pickling process is very important. It can remove the oxide scale and rust on the surface. How does it happen? The method of removing the oxide and rust on the surface of steel by acid is called acid was
- Rust removing method of steel pipeThere are about 5 ways to remove rust from steel pipes. They are cleaning, pickling, ejecting and rust removing. 1.CleaningThe cleaning method is the use of solvent, emulsion cleaning steel surface, in order to achieve the removal of oil, grease, dust, lubricants and other similar organic compounds,