Kunlian Steel Pipe provides: 20g thick-walled seamless steel pipe use The steel pipe whose outside diameter and wall thickness is less than 20 is called a thick-walled steel pipe.
It is mainly used as petroleum geological drilling pipe, cracking pipe for petrochemical industry, boiler pipe, bearing pipe, and high-precision structural pipe for automobiles, tractors and aviation.
Seamless steel pipe manufacturing process 1. Hot rolling (extrusion seamless steel pipe): round billet → heating → perforation → three roll oblique rolling, continuous rolling or extrusion → stripping → sizing (or reducing) → cooling → Straightening→hydraulic pressure test (or flaw detection)→marking→stock The raw material for rolling seamless tubes is round tube blanks. The round tube blanks are cut to a length of about 1 meter through a cutting machine, and are conveyed by a conveyor belt. Heat into the furnace. The billets are heated in a furnace and the temperature is about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. After the tube blanks are released, they are put through the pressure puncher. The most common punching machine is a conical roller puncher. This puncher has high production efficiency, good product quality, large perforation diameter, and can wear a variety of steel types. After piercing, the round billet is successively rolled, rolled or extruded by three rolls. After squeezing, take off the sizing. The sizing machine drills through the cone at a high speed into the steel die to form a steel pipe. The inner diameter of the steel pipe is determined by the outer diameter length of the sizing machine drill. After the steel pipe is sizing, it enters the cooling tower and is cooled by spraying water. After the steel pipe is cooled, it must be straightened. After straightening the steel pipe, it is sent to the metal detector (or hydraulic pressure test) by the conveyor belt for internal inspection. If there are cracks inside the pipe, air bubbles and other problems will be detected. After the quality inspection of steel pipes, strict manual selection is also required. After the quality inspection of the steel pipe, the paint is sprayed with the serial number, specifications and production lot number. And lifted into the warehouse by a crane.
Sharp Blade, used to cut things like wallpaper, so it is called "wallpaper knife", also known as "art knife". Decoration, decoration, advertising plaque industry is often used.
The most important feature of wallpaper knife is to use the segmented blade which is easy to replace. When using, it can fold off the non sharp section. It can keep the sharpness all the time without sharpening the knife.
Art knife, also known as carving knife or wallpaper knife, is a kind of knife used for art and handicrafts. It is mainly used to cut soft things. It is mainly composed of plastic handle and blade. It is a pull-out structure. There are also a small number of metal tool handles. Most of the blades are inclined. They can be broken along the line of the blade body with blunt blade. New blade appears, which is convenient to use. There are various sizes of art knives.
Wholesale Utility Knife,Office Use Retractable Art Knife Cutter,Sharp Art Knife
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