16Mn thick wall coiled pipeOperation mode and characteristics

All continuous pipe welds shall be penetration tested.

First, select the specification and put forward the pipe, such as 90 & deg; Elbow,Q460b thick wall coiled pipe, which can calculate the curvature to calculate the 90 DEG of the long material; Elbow, and then cut with the length as the fixed length.

.Grounding current, while external welding uses a larger welding current. However when the welding current is large, the effect of welding rod is intensified, and the melting amount of welding wire is also increased accordingly, the weld reinforcement is increased, the weld formation is deteriorated, and the edge transition is poor.

The pipeline installation sequence is based on the principle of sub area and sub system, with small diameter, from the lower layer to the upper layer, from difficult to easy from the pipe gallery to the equipment. In principle,Q235B welded pipe, the pipeline connected with the machine is configured from the inside to the outside to reduce the impact of welding stress on the installation accuracy of the machine. The interface between indoor and outdoor pipelines shall be left outdoors. Q345B thick wall coiled pipe is a kind of material in carbon steel and is widely used. The thickness of Q345B thick wall coiled pipe is generally more than 10mm, which is widely used in drainage engineering, sewage pipeline, dredging pipeline, construction pipeline, etc. Q345B thick wall coiled pipe is a welded pipe product, and the process in the welded pipe is relatively simple and flexible. This type of steel pipe usually has no inventory and is processed by user. If the quantity is small, the raw materials are not good. The main problem of Q345B thick wall coiled pipe is welding. As long as it is possible, the delivery related requirements can be compared with other products.

.Finish machining is performed below, and after shot peening, the scales on the inner and outer surfaces of the elbow are removed, and both ends are processed with grooves to facilitate welding.

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;.

The rolled pipe shall meet the specified arc degree, end face deviation, straightness, etc.

With the development of domestic economic situation and the acceleration of welding and casting trend, the advantages of NC cutting are gradually recognized. It has long provided various brand products such as hot-rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing and rolling pipe factory. The designated products are complete and the quality is guaranteed. NC cutting not only greatly improves the rate of plate and product quality, but also improves the working environment and labor efficiency. At present, 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, and only 10% is manual cutting; The CNC cutting machine only accounts for part of the total blanking. 10%, of which the proportion of NC plasma cutting is small. In industrial production, the thermal cutting of thick wall coiled pipe generally includes gas cutting, plasma cutting, laser cutting and so on. 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. It shows great advantages in saving materials and improving labor productivity. This leads to the development of plasma cutting technology from manual or semi-automatic to NC, which has become one of the main directions of NC cutting technology. NC plasma cutting technology is a set of high-tech technologies such as NC technology, plasma cutting technology and inverter power supply technology. Its development is based on the common progress of computer, plasma arc characteristic research, power electronics and other disciplines. The CNC cutting technology began in the 1980s, and the CNC plasma cutting technology was later. However recently, some domestic universities, research institutes and manufacturers have studied NC plasma cutting technology and gradually developed and produced various specifications of NC plasma cutting equipment, narrowing the gap of foreign advanced technology.

How about thick wall coiled pipe? Generally, which can remove oxide scale, rust and old coating. Sometimes it can be used as reprocessing after sand blasting. Although chemical cleaning can make the surface reach a certain cleanliness and roughness, its anchor lines are shallow and easy to pollute the environment. Under the action of abrasive impact and force, the steel pipe can also achieve the required uniform roughness.

Deviation reel as follows (unit: mm): nominal diameter & amp; amp; lt; 800 800 to 1200 1300 to 1600 1700 to 2400 2600 to 3000 perimeter Deviation & plusmn; 5± 7± 9± 11± 13 ovality is 1% of the outer diameter, 4 6 8 10 and no more than 4 steel plate coils have standards. At present, we carry out construction according to the acceptance of standard GB / t19793-92.

market.The rolling pipe production technology requires that the rolling pipe weld is a double-sided weld, two longitudinal welds are allowed, and the weld spacing exceeds 300 mm. The welding appearance and quality standard shall not be lower than the level standard in the welding specification.

The steel plate coil adopts the secondary forming process. When rolling, first bend both ends of the steel plate, and the diameter shall be less than the diameter of the coiled pipe. Then adjust the bed pressure, rolling two to three times steel pipe coiled pipe welding and strengthening the rolling pipe joint, long-term rolling pipe, Q235B coil pipe, Q345B coil pipe large diameter thin wall tube, large diameter heavy wall coil pipe, stainless steel coil pipe, L360 coil pipe, 16MN coil pipe and other brand products, designated products are complete, quality assurance. Then transported to the welding platform for welding.

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, 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, but there is still a very obvious gap with foreign countries, and only 10% is manual cutting; The CNC cutting machine only accounts for part of the total blanking. 10%, 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, service and quality. Your satisfaction is our pursuit! Welcome to inquire. In industrial production,Q355b straight seam welded pipe, 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, low cost. The rolling pipe is mainly used for pipes, billboards, columns, etc.

Where to sell API.All continuous pipe welds shall be penetration tested.

Qualitative properties, for example, the strength of steel is greater than that of its main constituent element iron. Professional hot rolled steel pipe, large diameter thick wall rolling pipe, thick wall straight seam rolling pipe steel casing, rolling pipe factory, safety, environmental protection and economy! The products are exported to foreign countries and are deeply trusted. The physical properties of the alloy, such as density, reactivity and Young's modulus, may be similar to the constituent elements of the alloy. High quality thick wall steel plate coil, but the tensile strength and shear strength of the alloy are usually very different from the properties of the constituent elements and the atomic arrangement in the simple substance.

Hot rolled steel pipe is a kind of thick wall steel pipe rolled under the condition of heating the steel plate.

.Meet the following requirements: 1. The longitudinal joint of butt joint shall not be greater than 10% of the wall thickness plus 2mm, and shall not be greater than 3mm. 2. The longitudinal joint of joint 200mm away from the pipe end shall not be greater than 2mm. 3. Other parts shall not be greater than 1mm. 4. The vertical deviation between the end face of coiled pipe and the center line shall not be greater than percent of the outer diameter of pipe and shall not be greater than 3mm. The straightness deviation shall not exceed 1mm / m. 5 the weld cannot be double-sided molded coiled pipe. When the nominal diameter is greater than or equal to 600mm, it is recommended to seal and seal in the pipe. In order to obtain better uniform cleanliness and roughness distribution, the particle size and proportion design of rinse agent is very important. The roughness is too large, which may cause the anti-corrosion layer to become thinner at the peak of the cloud path. At the same time, because the cloud path is too deep, bubbles are easy to form in the process, which seriously affects the performance of the layer.

The influence of welding process parameters mainly includes two aspects: according to the production characteristics of spiral steel pipe, the welding current is usually smaller for internal welding and larger for external welding. However under the condition of large welding current, the stirring effect of molten pool is intensified, and the melting amount of welding wire is also the same

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, 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.