Q345B thick wall coiled pipeApplication in parts processing

The main purpose of preheating is to reduce the cooling rate of welded joints and preheat temperature. As can be seen from the table, preheating can reduce the cooling rate, which is ideal. Therefore, when welding thick wall coils with hardening trend, the main technical measure to reduce the cooling rate and hardening trend is preheating rather than increasing the line energy. Plasma cutting of thick wall coiled pipe is more effective than gas cutting

Generally, the wall thickness of coiled pipe is 20mm and the outer diameter is 450-

.The electric contact pressure gauge is used to press down the pressure of the oil cylinder on both sides of the conveyor to ensure the smooth transportation of strip steel.

Thick wall coiled pipe is made of steel plate. Thick wall coiled pipe can be divided into coiled pipe and hot rolled thick wall coiled pipe.

.The influence of welding process parameters on welding current mainly includes two aspects: according to the production characteristics of spiral steel pipe, small welding current is usually used for internal welding

It is important that the thick wall coiled pipe will not damage the performance of raw materials. The disadvantage of hot roll thick wall rolling pipe is that the treatment time is long Very expensive. Thick wall rolling pipe is widely used: cylinder,Q460b thick wall coiled pipe, hydraulic, bridge, roller, etc.

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.

Application of hot rolled steel pipe: the disadvantage of changing hot rolled steel pipe into seamless steel pipe with fixed specification and model is another major feature of hot rolled steel pipe. In the production process, hot rolled steel pipe has been widely used, especially in large equipment such as oil cylinder production, bridge construction, engineering column, large drum and so on. Save materials and labor for the above enterprises, reduce production costs, improve the market competitiveness of finished products, and promote the development of enterprises to a certain extent. Continuous pipe is committed to producing all kinds of circumferential seam,16Mn large diameter thick wall welded pipe, longitudinal circumferential continuous pipe and penstock, and is reformed on the basis of the same specification and model of traditional pipe rolling equipment. The function of parameters of pipe rolling equipment is improved by 30%, which fills the gap that can not be produced by traditional steel rolling equipment. It can produce steel pipes with diameter of more than 400 and wall thickness of 8-100mm.

Mixed alloy (eutectic mixture): when the liquid alloy solidifies, Qinhuangdao thick wall steel plate coil the alloy formed by the crystallization of each component of the alloy, such as solder, bismuth cadmium solid melt alloy and the alloy forming solid solution when the liquid alloy solidifies, such as gold and silver alloy; Many properties of alloys are better than pure metals, so alloys are mostly used in applied materials. The formation of alloys often improves the single element

The so-called expanding diameter actually belongs to the pressure processing technology that uses hydraulic or mechanical pressure to apply customized to the inside of the steel pipe, so as to expand the steel pipe outward along the radial direction. Mechanical mode is simpler and more efficient than hydraulic mode, so it is more common in practical application. In particular, it is adopted in the very advanced expanding process of several large-diameter straight seam rolling pipelines.

retailer.The misalignment of butt weld of coiled pipe shall not exceed 20% of wall thickness and shall not exceed 2mm. Butt joint of two pipes with small adjacent deviation value.

The steel plate rolling pipe we call the steel plate rolling pipe is actually a process. The following small series will describe the process sequence: plate inspection, blanking, beveling, steel plate rolling, assembly spot welding, campus, perimeter and roundness deviation inspection, welding, weld inspection, pipe test and delivery. Professional hot-rolled steel pipe,Q550b large diameter thick wall coiled pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory and other special products, old brands, price advantages and guaranteed quality. These processes can not be less.

It should be noted that in practice, it is difficult to achieve the ideal proportion of metal sand and metal ball in the rinsing agent, because the hard and brittle metal sand has a higher crushing rate than the metal ball. For this reason, the mixture should be sampled continuously and the mixed rinse should be tested. According to the particle size distribution, and the amount of metal sand is usually the same in the new rinse agent.

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, high precision and good performance. It is the main equipment for large-scale production of steel pipes.

retailer.The diameter of thick wall coiled pipe is usually higher than dn450. Thick wall coiled pipe is sometimes two welds. The reason why this happens is mainly due to the problems of raw materials and equipment processing. The steel plate with the required width of welded pipe required by the customer is usually not produced by the steel plant, so two plates need to be welded, so the weld will occur.

Starting from the service life of tools and the surface quality of pipes, the hot furnace is divided into heating furnace and reheating furnace according to their functions. The former uses heat to the processing temperature; the latter is used to reheat the blank to the necessary processing temperature in the processing process. There are many forms of heating furnace, but the ring heating furnace is mainly used. This furnace bottom, It can rotate slowly. The blank is loaded along the diameter direction of the furnace bottom from the inlet. When it is rotated to the outlet, it can be heated and homogenized to the specified temperature. The furnace process is relatively slow, and the heating operation needs patience. Because if the heating operation is not standardized cracks, folding and eccentricity on the inner or outer surface of the tube blank will only affect the product.

Gas and other projects.

.First, select the specification and put forward the pipe, and then cut with the length as the fixed length.

All continuous pipe welds shall be penetration tested.

Before starting up which can calculate the curvature to calculate the 90 DEG of the long material; Elbow, it is necessary to check whether the hot coil machine operates normally and fill the oil hole with oil.