Q355b large diameter welded pipeInstallation manuals and methods

announcer:hp709HP180518493 release time:2022-03-16 14:24:35

welded pipe definition: the pipe formed by crimping the plate and strip into a pipe barrel with specified shape and size and welding the joint with appropriate welding. Applied discipline: Material Science and Technology (level discipline); Fundamentals of materials science and Technology (level discipline); Material synthesis, preparation and processing (level discipline); Plastic processing technology (level discipline) what are the main raw materials of electric welded steel pipe?

The wall thickness of coiled pipe like coiled pipe is under 20mm and the outer diameter is 450-3000mm. It is made of steel plate by direct rolling, welding, forming, butt joint and rebar removal. Coil pipe has the characteristics of short processing time, rapid delivery and low cost. The rolling pipe is mainly used for pipes, billboards, columns, etc.

.The straightening of thick wall coil pipe is to enter the inlet roller table of the straightener from the upstream roller table. When the head of thick wall coiled pipe is sensed by the middle position sensing element of the inlet roller table, the roller table decelerates; When the head of the thick wall coiled pipe is sensed by the position sensing element at the end of the inlet roller table, the inlet roller table section falls, and the closing delay of the inlet quick opening cylinder starts timing; When the pipe head enters the middle position of the inlet straightening roll, the inlet quick opening cylinder is closed, the thick wall coil is bitten in, the professional hot-rolled steel pipe, large-diameter thick wall coil, thick wall straight seam coil, steel casing, the performance of the coil factory is stable, safe, reliable and maintenance free, and the technical level has reached the domestic level and the advanced level of similar products in the world. At the same time, the roller table at the inlet section falls. The second is the setting of quick opening cylinder delay. When the pipe head enters the middle position between the intermediate roll and the outlet roll, the quick opening cylinders of the intermediate roll and the outlet roll are closed one after another, and the rolling pipe, Q235B rolling pipe, Q345B rolling pipe, large-diameter thin-wall rolling pipe, large-diameter thick wall rolling pipe, stainless steel rolling pipe, L360 rolling pipe and 16Mn rolling pipe ensure the quality. Your satisfaction is our pursuit! Welcome to inquire. Thick wall coil enters the straightening process.

The longitudinal weld of the same barrel part of the coiled pipe shall not be greater than 2.

.The production process of thick wall welded pipe can be divided into cold rolling, cold rolling and hot rolling. The steel pipes are made of 10, 35 and 45, which are referred to as ordinary steel pipes for short, and 16Mn is between ordinary steel pipes and alloy steel pipes. This material is called low alloy steel pipe, the steel pipe materials are 27SiMn, 12Cr1MoV, 10crmo9 15CrMo and 35CrMo, and the stainless steel pipe is collectively referred to as alloy steel pipe. According to the use, it is divided into structural seamless steel pipe; Seamless steel pipe transportation; Seamless steel pipe for boiler; High pressure seamless steel pipe for boiler; High pressure seamless steel pipe for fertilizer equipment; Seamless steel pipe for geological exploration; Jointed steel pipe; Seamless steel pipe for petroleum cracking; Marine seamless steel pipe; Cold drawn cold rolled precision seamless steel pipe; Various alloy pipes.

The quality of steel rolling pipe is greatly affected by the size of weld, mainly including welding process parameters, shape and position parameters of welding wire, flux flow, flux process performance, forming joint and other comprehensive factors.

Weld inspection is necessary to detect the weld quality of steel coil pipe. After welding, all the welds are tested by on-line continuous ultrasonic automatic flaw detector to ensure the NDT coverage of the welds. If there are defects, it will automatically alarm and spray marks, and the production will adjust the process parameters at any time to eliminate the defects in time.


Q355b large diameter welded pipeInstallation manuals and methods



Pipe rolling is to form the steel pipe blank with a steel plate rolling machine then weld it into steel pipe with submerged arc welding or electric welding, and then conduct sizing and forming on other forming equipment. This kind of pipe is single piece production with low efficiency, unstable pipe quality and low dimensional accuracy, but the equipment is simple and the investment is less. Longitudinal welded pipe equipment has high efficiency, good quality,Q355b large diameter thick wall welded pipe, high precision and good performance. It is the main equipment for large-scale production of steel pipes.

Raw materials such as ferric chloride are prepared into corrosive solution in proportion. Generally, the production process of thick wall continuous pipe can be divided into cold drawing and hot rolling. The production process of cold rolled seamless steel pipe is generally more complex than that of hot rolling. The pipe blank must first be tested for coil diameter. If there is no response crack on the surface, the round pipe shall be cut into a blank with a length of about m by a cutter, but acid shall be used for annealing during annealing, and attention shall be paid to whether there are a large number of bubbles on the surface. If a large number of bubbles appear, the quality of the steel pipe will not meet the response standard. The appearance of cold-rolled seamless steel pipe is shorter than that of hot-rolled seamless steel pipe, but the surface is brighter than that of thick wall seamless steel pipe, the surface is not too rough, the diameter is not too prickly and the strength is high. The manufacturer offers, operates in good faith, thick wall continuous pipe, spot supply, and complete specifications,Q235B straight seam welded pipe,. Then, large diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory, high price, service, on-site settlement, honest operation! The corroded sample is cleaned in the ultrasonic generator after cleaning and the powder falling off the sample during ultrasonic cleaning is collected for filtration and drying to obtain the carbide particles falling off the sample after corrosion. The pipe rolling plant will conduct scanning electron microscope and energy spectrum analysis on the cleaned samples and collected carbonization. What is the application of pressure perforation in pipe rolling production?

The diameter of large-diameter thick wall coiled pipe is generally above dn450. Long term supply of hot rolled steel pipe, large diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory, old brand price advantage and quality guarantee! Sometimes there are two welds for large-diameter thick wall coiled pipe. Why does this happen? It is mainly due to the problems of raw materials and equipment processing. The steel plate with the required width of large-diameter welded pipe required by the customer is not produced by the steel plant, so the two plates must be welded, so this kind of weld occurs. The main problem of large-diameter thick wall coiled pipe is welding. As long as the flaw detection can be carried out, the delivery can be carried out. The relevant requirements are broader than other products. The detection of large-diameter thick wall coiled pipe is mainly ultrasonic flaw detector, and the longitudinal weld on the same barrel section of the coiled pipe should not be more than two. The group of butt welds of coiled pipe shall be flush. When the nominal diameter is greater than, back sealing welding shall be carried out in the pipe. During pipe rolling processing, the surface damage of the plate shall be prevented.

Energy costs.After pushing, the elbows should be formed in this hot state, which is not allowed. In addition, after pushing the head, the outer diameter of the front end is usually large and formed by the forming die. The forming die is actually a press. It must have a set of molds, two semi arcs, the sector continues to retract from the circumferential position of the rewind pipe before rewinding, and will eventually reach the initial expanding position, which is the small shrinking diameter of the sector required by the expanding process. In practical application, in the process simplification, the three steps can be combined and simplified, which has no impact on the expanding quality of steel pipe. How to calculate the weight per meter of steel coil? Steel coil belongs to steel pipe, so it is combined with general formula when carrying out theoretical weight.


Q355b large diameter welded pipeInstallation manuals and methods



The quality of steel rolling pipe is greatly affected by the size of weld, mainly including welding process parameters, shape and position parameters of welding wire,16Mn welded pipe, flux flow, flux process performance, forming joint and other comprehensive factors.

quality index.Because the coiled steel pipe plays an important role in construction, railway construction and bridge construction, its quality standards are also more important. If you don't understand the quality specifications and standards, it is easy to have an impact. Generally, we can purchase from these aspects.

Generally, the wall thickness of the coil is 20mm and the outer diameter is 450-3000mm. It is directly rolled and welded from the steel plate. It has the advantages of short processing time, fast delivery and low cost. Coil is mainly used for pipes, billboards etc.

Since the groove sizes of longitudinal and circumferential joints of hot-rolled pipes are different, it is necessary to confirm whether the inner side is upward before plate rolling to ensure the correctness of groove direction.

.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

Separate & ldquo; Hot coil & rdquo; The word is a noun, which is the abbreviation of hot rolled coil, and the hot coil used here to connect with thick wall steel pipe is a verb, indicating a kind of behavior.

When the pipe is rolled, the distance between the two welds shall be greater than 100mm, and the distance between the outer wall of the outer branch pipe shall not be less than 50mm.