Gas and other projects.
Hot rolled steel pipe is a kind of thick wall steel pipe rolled under the condition of heating the steel plate.
.Thick wall coiled pipe is not only used to transport fluid and powdery solids, exchange heat energy, mechanical parts and containers, but also a kind of economic steel. Building structural grid with steel can reduce weight, save metal by 20 ~ 40% and realize industrialized mechanized construction. Building highway bridges with steel can not only save steel and simplify construction, investment and maintenance Maintenance cost. Thick wall coiled pipe is mainly used in tap water engineering but also greatly reduce plot, petrochemical industry, electric power industry, agricultural irrigation and urban construction. It is mainly used in tap water engineering,20# large diameter reel, petrochemical industry, chemical industry, electric power industry, agricultural irrigation and urban construction. It is one of the key products of development. It is used for gas transmission: gas, bridge, wharf road, building structure pipe, etc.
Move the steel pipe twice to weld and reinforce the rolled pipe joint, and then transport it to the welding platform for welding.
.However, the disadvantages of manual cutting and cutting are also obvious, and the quality of the incision is very poor Big size error There is a great waste of materials The post-treatment process has large processing capacity and poor working conditions. Cutting with a forming machine can greatly improve the quality of the workpiece, but the workpiece must be pre machined. It is not suitable for blanking of single chip, small batch and large workpiece. Although the semi-automatic cutting machine reduces the labor intensity, its function is simple and is only suitable for cutting two shapes. Due to the low cost of equipment, the above cutting is easy to operate compared with CNC cutting Easy to operate, it is still widely used in small and medium-sized enterprises.
When the nominal diameter is larger than the internal seal of the pipe and when the butt weld is flush with the pipe, it is and coiled pipe. During pipe rolling, the surface of the circuit board shall be protected from damage.
Let me introduce the standard coil produced by steel plate. In the process of rolling, the surface of the circuit board should be protected from damage. Parts with severe scars shall be ground to achieve transition, and the wall thickness of the ground part shall not be less than the design wall thickness.
The inner diameter of 1800mm steel plate coiled pipe elbow is 1800mm, the bending radius is also 1800mm, four bends, the material thickness is 4mm, and the bending is 90 & deg;.
Thick wall coil production process thick wall coil production process can be divided into cold drawing, cold rolling, hot rolling and hot expansion.
Have we learned about the packaging process of the steel used? Today, let's discuss the packaging process of lower thick wall coil.
Pursuit of excellence.Today's equipment is double-sided submerged arc welding, because it goes without saying that double-sided welding is necessary here.
Continuous pipe is committed to producing all kinds of circumferential seam, longitudinal circumferential continuous pipe and penstock,20# large diameter welded pipe, and is reformed on the basis of the same specification and model of traditional pipe rolling equipment.
The offer is in progress. Welcome new and old customers to consult. Prevent surface damage of steel plate. Thick wall coil and large diameter coil are mainly made of carbon steel, Q19 q23 q34 16Mn, etc. coil is a kind of welded pipe product with simple and flexible process. If the length required by the customer is special, two or more steel pipes must be connected. Therefore, the process of this welded pipe is flexible, convenient and applicable. The disadvantage is that it can not be produced by mechanized line. The level of automation and mechanization is not high, which requires a lot of manual processing. The main problem of coiled pipes is welding. Thick wall coiled pipes can be delivered as long as they can be inspected by flaw detection. The relevant requirements are broader than other products.
The butt joint of coiled pipe (with the same wall thickness) shall not exceed 10% of the wall thickness and not more than 2mm.
Industry management.Thick wall coiled pipe is a kind of familiar steel. It is widely used in construction and pipeline industry because of its durable performance and excellent quality. Have we known about the packaging process of the frequently used steel? With the development of domestic economic situation and the acceleration of welding and casting trend, the advantages of NC cutting are gradually recognized. NC cutting not only greatly improves the rate of plate and product quality, but also improves the working environment and labor efficiency. At present, the NC cutting machines used in the thick wall coil processing industry are mainly flame and ordinary plasma cutting machines, but pure flame cutting can not meet the needs of modern production. At present, most NC cutting machines are NC plasma cutting machines. This type of cutting machine can meet the needs of thick wall coiled pipe plate processing and thick wall coiled pipe parts processing, so the demand will be greater and greater, but there is still a very obvious gap with foreign countries, which is mainly reflected in: 90% of the developed thick wall coiled pipe processing industry is digital control cutting machine,Q550b thick wall welded pipe, of which the proportion of NC plasma cutting is small. Professional hot rolled steel pipe, large diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory to ensure quality, service and quality. Your satisfaction is our pursuit! Welcome to inquire. In industrial production, thick wall coil thermal cutting generally includes gas cutting, plasma cutting, laser cutting, etc. Among them, plasma cutting has a wider cutting range than gas cutting More efficient. Fine plasma cutting technology is close to laser cutting in material cutting surface quality, but the cost is much lower than laser cutting. Therefore, since the successful development of the United States in the mid-1950s, plasma cutting has developed rapidly. With the rapid development of computer and digital technology, NC cutting is also developing, which improves the machining accuracy. Save materials
In continuous pipe production, expanding and piercing method is widely used. Large diameter pipe rolling is drilled in the center of the blank φ 20 ~ 40mm guide hole, and then push the stamping rod from the guide hole to expand the guide hole to make the hollow blank extend reversely in the die. The capillary perforation precision is high, so the perforation precision is high.
When the nominal diameter is larger than the internal seal of the pipe, and when the butt weld is flush with the pipe, it is and coiled pipe. During pipe rolling, the surface of the circuit board shall be protected from damage.
.The longitudinal weld of the same barrel part of the coiled pipe shall not be greater than 2.
In short, hot rolled steel pipe is a special thick wall steel pipe rolled with steel plate under heating conditions. Here, hot coiling refers to heating to coil the steel plate. Its meaning shall be determined with cold rolled steel pipe.
API seamless steel pipe is expressed as outer diameter, wall thickness and thick wall seamless steel pipe, which is mainly used for machining, coal mine, hydraulic steel and other purposes. Classification of thick wall seamless steel pipe & mdash& mdash; Hot rolled thick wall seamless steel pipe, cold rolled thick wall seamless steel pipe, cold drawn thick wall seamless steel pipe, thick wall seamless steel pipe, stainless steel seamless steel pipe for pipe jacking structure (GB / t14975-199) are widely used in corrosion-resistant pipes and structural members in chemical, petroleum light textile, food, machinery and other industries, and stainless steel hot rolled (,) and cold drawn (rolled) Seamless stainless steel pipe for fluid transportation (GB / t14976-199) is a hot-rolled (extruded) and cold drawn (rolled) seamless steel pipe made of stainless steel for fluid transportation.