Application treatment method of seamless steel pipe:

1. Grinding of the nozzle of the seamless steel pipe: After cutting, an angle grinder should be used to grind the plastic layer of the nozzle. The purpose is to avoid melting or even burning of the plastic layer during flange welding, which may damage the pipeline. Use an angle grinder to grind the nozzle plastic layer.

2. Plastic coating treatment of seamless steel pipe: After grinding, use oxygen and C2H2 to heat the nozzle outside the pipe until the inner plastic layer melts, and then the skilled worker will use the prepared plastic powder to evenly apply the nozzle to the nozzle. , It should be noted that it must be smeared in place, and the flange plate should be smeared above the water stop line. In this process, the heating temperature should be strictly controlled. If the temperature is too high, bubbles will be generated during the plastic coating process. If the temperature is too low, the plastic powder will not melt completely during the plastic coating process. The phenomenon that the layer falls off, so that the seamless steel pipe part of the pipeline is corroded and damaged.

3. Cutting of seamless steel pipes: According to the actual required pipeline length, metal saws and toothless saws should be used to cut the pipelines. When using water welding in the cutting process, there must be a method of protecting the raw materials. When cutting, fire-resistant and heat-resistant materials should be used as baffles at both ends of the fracture to catch the sparks and hot iron beans that fall during cutting, and protect the original plastic layer of the raw material.

4. Seamless steel pipe pipe connection: After plastic repair, connect the pipe and the pipe fittings, add rubber pads between the flanges during the connection process, and tighten the bolts to a sealed shape.

Seamless carbon steel pipes are made of steel ingots or solid billets through perforation to make capillaries, which are then hot-rolled, cold-rolled or cold-drawn.

The raw material of seamless carbon steel pipe is a round tube blank, which is cut by a cutting machine into a billet with a length of about 1 meter, and sent to a furnace for heating through a conveyor belt. The billets are fed into the furnace and heated at about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature control in the furnace is a key issue. After the round tube blank is released from the furnace, it must be pierced by a pressure piercer. Generally, the most common punching machine is the conical roller punching machine. This kind of punching machine has high production efficiency, good product quality, large amount of perforation and diameter expansion, and can wear a variety of steel grades. After perforation, the round tube blank is successively cross-rolled, continuously rolled or extruded by three rolls. After extrusion, the tube should be removed and sizing. The sizing machine rotates into the steel billet at high speed through the conical drill bit to punch holes to form steel pipes. The inner diameter of the steel pipe is determined by the outer diameter of the drill bit of the sizing machine. After the steel pipe is sizing, it enters the cooling tower and is cooled by water spray. After the steel pipe is cooled, it will be straightened. After straightening, the steel pipe is sent to the metal flaw detector (or hydraulic test) by the conveyor belt for internal flaw detection. If there are cracks, bubbles and other problems inside the steel pipe, it will be detected. After the steel pipe quality inspection, it must pass strict manual selection. After the quality inspection of the seamless steel pipe, the serial number, specification, production batch number, etc. are sprayed with paint. And lifted into the warehouse by crane.

Application treatment method of seamless steel pipe:

1. Grinding of the nozzle of the seamless steel pipe: After cutting, an angle grinder should be used to grind the plastic layer of the nozzle. The purpose is to avoid melting or even burning of the plastic layer during flange welding, which may damage the pipeline. Use an angle grinder to grind the nozzle plastic layer.

2. Plastic coating treatment of seamless steel pipe: After grinding, use oxygen and C2H2 to heat the nozzle outside the pipe until the inner plastic layer melts, and then the skilled worker will use the prepared plastic powder to evenly apply the nozzle to the nozzle. , It should be noted that it must be smeared in place, and the flange plate should be smeared above the water stop line. In this process, the heating temperature should be strictly controlled. If the temperature is too high, bubbles will be generated during the plastic coating process. If the temperature is too low, the plastic powder will not melt completely during the plastic coating process. The phenomenon that the layer falls off, so that the seamless steel pipe part of the pipeline is corroded and damaged.

3. Cutting of seamless steel pipes: According to the actual required pipeline length, metal saws and toothless saws should be used to cut the pipelines. When using water welding in the cutting process, there must be a method of protecting the raw materials. When cutting, fire-resistant and heat-resistant materials should be used as baffles at both ends of the fracture to catch the sparks and hot iron beans that fall during cutting, and protect the original plastic layer of the raw material.

4. Seamless steel pipe pipe connection: After plastic repair, connect the pipe and the pipe fittings, add rubber pads between the flanges during the connection process, and tighten the bolts to a sealed shape.

Seamless black steel pipe is made up of steel that has not being galvanized. Its name comes from the skin, dark-colored iron oxide coating on its surface. It is used in applications that does not requires galvanized steels.

Read more : seamless black steel pipe