45# reelHow to debug in the industry to save energy and protect the environment

Have we learned about the packaging process of the steel used? Today, let's discuss the packaging process of lower thick wall coil.

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

.8-100mm steel pipe.

Today's equipment is double-sided submerged arc welding, because it goes without saying that double-sided welding is necessary here.

.Today's equipment is double-sided submerged arc welding,20# large diameter reel, because it goes without saying that double-sided welding is necessary here.

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± The ovality is 1% of the outer diameter, and the quality of no more than 4 steel plate coils is greatly affected by the weld size, mainly including the comprehensive factors such as welding process parameters, welding wire shape and position parameters, flux flow, flux process performance and formed joint.

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, the new rinse agent is added to the cleaning machine, and the amount of metal sand is usually the same in the new rinse agent.

Round welded pipe joints shall be circular. The arc length of the coil calibration circle shall be 1 / 6 to 1 / of the circumference of the pipe, and the gap between the sample and the pipe shall comply with

Relying only on the radial diffusion of the fluid and the role of radial secondary flow is equivalent to updating the boundary layer and renewing the mass transfer surface. It enhances the mixing of the fluid during laminar flow and improves the mass transfer effect. The spiral tube will also improve the tube type, that is, the flow pattern of shell flow. It will increase the radial mixing outside the tube and reduce the channel flow and dead zone on the shell side. At the same time, due to the proximity to cross flow, The mass transfer surface of the fiber is constantly updated, and the mass transfer coefficient of the shell side will increase. This is the general advantage of spiral tube. But it has other special functions in many practical applications. The spiral tube heat exchange made according to the spiral tube structure has the advantages of solid structure, strong adaptability, wide range of material selection, easy and low production cost. It is widely used in Hebei large-diameter spiral steel pipe manufacturers in refrigeration and air conditioning, chemical industry, medicine and other industries. The original steam parameters of medium pressure boiler mostly use surface desuperheater. Due to the limited temperature regulation range of casing surface desuperheater in the original design, maintaining the superheated steam temperature often becomes a restrictive factor for the change of boiler fuel and operation mode. In order to increase the temperature regulation range of surface desuperheater, Harbin Xinfuhua project designed FH spiral tube desuperheater, also known as Panxiang tube desuperheater. This will reduce the temperature very well.

Before starting up, it is necessary to check whether the hot coil machine operates normally and fill the oil hole with oil.

Credit guarantee.The process of heating the whole thick wall coil or welding area before welding is called preheating. For the steel with high welding strength grade, it has hardening trend, especially good thermal conductivity, it is necessary to preheat the weldment before welding.

The arc length of the coil calibration template shall be 1 / 6 ~ I of the circumference of the pipe / the gap between the template and the pipe. What is the manganese content of the straight seam coil? Q345B coil manganese is a common element in structural steel. Manganese in carbon steel is mainly added to the steel water as deoxidizer in the steelmaking process, manganese is a mixed alloy element, and the manganese content in 16Mn steel and 15MnV steel is 2-6%.

Steel plate materials mainly include Q235, Q345, 20,45# large diameter welded pipe, 45, 35cimo and 42cimo with 16 manganese and 16 manganese capacity. Generally, cold rolled plate can be used for pipe winding. Like oil, chemicals, piling and urban water supply, heating, 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 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

knowledge.Compared with seamless steel pipe, thick wall rolling pipe has the disadvantages of low cost, rapid delivery, breaking the fixed specification of seamless steel pipe, etc. Thick wall coiled pipe is made of steel plate or steel strip by bending and then welding. According to the weld form, it is divided into straight welded pipe and spiral welded pipe. According to the purpose, it is divided into general welded pipe, galvanized welded pipe, oxygen blowing welded pipe, wire sleeve, metric welded pipe, idler pipe, deep well pump pipe, automobile pipe, transformer pipe electric welding thin-wall pipe, electric welding special-shaped pipe and spiral welded pipe. Rolling pipe is committed to producing all kinds of rolling pipes and steel penstocks with circumferential seam and longitudinal ring,16Mn large diameter thick wall welded pipe, and is reformed on the basis of similar specifications and models of traditional rolling equipment. The function of improving the parameters of the rolling and welding steel pipe equipment by 30% fills the gap that the original traditional rolling equipment can not produce. It can produce steel pipes with diameter of more than 400 and wall thickness of 8-100mm. Materials mainly include q23 q34 20#, 16 manganese 16 manganese capacity, etc. Product executive standard: GB / t50205-200, GB / t3092-2001, etc. The products are widely used in petroleum, chemical industry, natural gas transportation, pile driving and urban water supply, heating, gas supply and other projects.

With the increase of arc length, the range is expanded, the weld pool is widened, and a wider weld formation will be obtained. If welding is carried out in a horizontal position, only the width of the weld will change without affecting the edge of the weld. Over external welding is carried out on a slope, and the molten weld metal will flow laterally under the action of gravity. It can be seen that the greater the welding voltage and the wider the weld pool, the more serious the weld metal will develop, * and eventually lead to the bias current of weld metal.

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

.It is to preheat rather than increase the line energy. Reel needs quality, honest business! Let's talk about our productivity.

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 4-100mm. The main materials are q23q3420, 435cimo and 42cimo, 16 manganese and 16 manganese capacity. Generally speaking, cold-rolled sheet can be used for pipe rolling. Product standards: GB / t50205-200, GB / t3092-2001, etc.

Continuous pipe products are widely used in petroleum, chemical industry, natural gas transmission, pile driving, urban water supply, heat supply, gas supply and other projects. The detection of thick wall continuous pipe is mainly ultrasonic flaw detection. The longitudinal weld of the same barrel section of thick wall continuous pipe shall not exceed two passes. The butt weld of thick wall continuous pipe shall be flush with the. When the nominal diameter is larger than, back sealing welding shall be carried out in the pipe. In the process of pipe rolling, the rolling quality of pipe, Q235B rolling, Q345B rolling, large diameter thin wall rolling, large diameter thick wall rolling, stainless steel rolling, L360 rolling and 16Mn rolling were analyzed. Professional hot rolled steel pipe, large diameter thick wall rolling pipe thick wall straight seam rolling pipe, rolling pipe factory, large quantity, excellent quality and low price, fire resistance - Waterproof - high temperature resistance strong and durable, safe and reliable