steel tube

　　At Prime Steel Pipe we are constantly working on all different types of projects. No matter what our team is working on, the safety of our employees is always our top priority. We can’t stress enough how important it is to keep all of your staff members safe while working together on a project. There are many precautions that can be taken that will help ensure a safe work environment for all workers in your next steel casing pipe or line pipe project ! 　　 Training 　　Before any team members begin working on a project, it is crucial that they go through a training process that explains their position in detail. They need to understand how to perform their job in a professional and safe manner. Throwing an employee into a project without proper training will lead to an unorganized and potentially dangerous situation for everyone involved. 　　 Have an Agenda 　　This may seem simple, but it is very important that all crew members know exactly what they should be doing and when duri...

　 　Seamless Steel Tube Classification 　　1. Seamless steel tube for structural purposes. Mainly used for general structure and mechanical structure. 　　2. Seamless steel tube for conveying fludes. Mainly used in engineering and large equipment on the transmission fluid piping. 　　3. Seamless steel tube for low and medium pressure boilers. Mainly used for industrial boilers and low pressure medium life of the boiler flud pipeline. 　　4. Seamless steel tubes for high pressure boilers. Mainly used for power station and nuclear power plant boiler high temperature, high pressure transmission fluid tank and pipeline. 　　5. Marine carbon steel and carbon manganese steel seamless pipe. Mainly used for ship boiler and superheater with I, II pressure pipe. 　　6. Seamless steel tubes for high pressure chemical fertilizer equipment. Mainly used for conveying high temperature and high pressure fluid pipelines on fertilizer equipment. 　　7. Seamless steel tube for petroleum cracking. Mainly ...

　　To ensure that the erw steel pipe in the winter welding perfect follow the following steps: 　　First, increase the welding current welding, slow down the welding speed, the appropriate increase in the cross-sectional area and length of the weld, if necessary, preheat. 　　Second, not outside the groove on the base metal to start arc, arc extinction to be filled when the pit. 　　Third, as far as possible not in low temperature conditions for bending, correction and assembly weldments. 　　Fourth, preheating before welding, welding process to strictly maintain the interlayer temperature should not be lower than the preheating temperature. 　　Fifth, the use of low hydrogen or ultra-low hydrogen welding materials. 　　Six, the entire weld should be finished as far as possible to avoid interruption.

　　Straight seam steel pipe wall thickness control is a difficult production. At present, the straight seam steel pipe manufacturers to improve the wall thickness in the production of precision uses the methods generally including: 　　1, Tube heating 　　Heating to the average to prevent rapid up and down temperature. Each take-off and landing temperature is to maintain a smooth slow, the maximum rise and fall temperature does not exceed 30 ℃. 　　2, Rolling mill mandrel 　　Average wall thickness of thick wall tube and solid billet make the probability of mandrel bending deformation significantly reduced, can effectively improve the wall thickness of the precision. 　　3, The accuracy of mandrel 　　The outer core of the machining accuracy control in ± 0.1mm, mandrel straightness bias does not exceed 5mm. Welding, the two core rods between the piercing a finishing pin positioning, welding in order to avoid the formation of the total straightness bias is too large. 　　4, The perfect ...

　　Seamless steel tubes are divided into hot-rolled (extruded) seamless steel tubes and cold drawn (rolled) seamless steel tubes due to their different manufacturing processes. Cold drawn (rolled) tubes are divided into two types: round tubes and shaped tubes. 　　1. Process flow overview: 　　Hot-rolled seamless steel pipe (extrusion seamless steel pipe): round billet → heating → perforation → three-roll cross-rolling, continuous rolling or extrusion → pipe removal → sizing (or reducing diameter) → cooling → blank pipe → straightening →Hydraulic pressure test (or flaw detection)→marking→inbound 　　Cold drawn (rolled) seamless steel pipe: round tube billet → heating → perforation → head → annealing → pickling → oiling (copper plating) → multi-pass cold drawing (cold rolling) → blank tube → heat treatment → straightening → Hydraulic test (inspection) → mark → storage 　　2. Seamless steel pipes are divided into the following varieties due to their different uses: 　　GB/T8162-1999 (seam...

　　Oil special pipes are mainly used for oil, gas well drilling and oil and gas transportation. It includes oil drill pipes , oil casings, and oil pipes. Oil drill pipes are mainly used to connect drill collars and drill bits and transmit drilling power. The oil casing is mainly used for supporting the well wall during and after the completion of the drilling process to ensure the drilling process and the normal operation of the entire well after completion. The oil pumping pipe mainly transports the oil and gas at the bottom of the oil well to the ground. 　　Oil casing is the lifeline for maintaining oil well operations. Due to different geological conditions, the state of the downhole is complicated, and the combined action of pulling, pressing, bending and torsional stress acts on the pipe body, which puts high requirements on the quality of the casing itself. Once the casing itself is damaged for some reason, it may result in a reduction in production and even scrapping of the enti...

　　GCr15 seamless steel pipe is a high carbon chromium bearing steel with less alloy content, good performance and wide application. After quenching and tempering, it has high and uniform hardness, good wear resistance and high contact fatigue performance. The cold working of the steel is medium in plasticity, the cutting performance is general, the welding performance is poor, the sensitivity to white spots is large, and the temper brittleness is obtained. 　　Chemical composition / element content (%) 　　C: 0.95-1.05 　　Mn: 0.20-0.40 　　Si: 0.15-0.35 　　S:<=0.020 　　P:<=0.027 　　Cr: 1.30-1.65 　　The heat treatment system is: steel bar annealing, wire annealing or 830-840 degree oil quenching. 　　Heat treatment process parameters: 　　1. Ordinary annealing: 790-810 degrees heating, after the furnace is cooled to 650 degrees, air cooling - HB170-207 　　2. Isothermal annealing: 790-810 degrees heating, 710-720 degrees isothermal, air cooling - HB207-229 　　3. Normal fire...

　　Carbon steel pipe can be divided into seamless steel pipe , straight seam steel pipe, spiral steel pipe, high-frequency welded steel pipe. Rolled seamless carbon steel pipe is the raw material of round tube, tube embryo to be cut through the cutting machine into a length of about 1 m of blank, and the conveyor belt to the furnace heating. The billet is fed into a furnace and heated at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. After the round tube billet to go through the pressure piercing machine to wear empty. Generally more common punching machine is conical roller piercing machine, this punching machine production efficiency is high, product quality is good, perforation expansion diameter large, can wear a variety of steel. After piercing, the round tube blank has been three-roll cross-rolling, rolling or extrusion. Squeeze after the tube diameter. Sizing machine through the high-speed rotation of th...

　　T-welded carbon steel pipe containing Ni in the acidic environment, strong corrosion resistance in the presence of sulfuric acid or hydrochloric acid environment, the T-shaped welded carbon steel pipe in the higher the content of Ni, the stronger the corrosion resistance. In the general environment, only in the T-shaped welded steel pipe to add Cr to prevent the phenomenon of erosion. The poor edge of the strip is another cause of the wrong side of the important reasons. Mass flow rate, heat flux, and structural parameters (helical curvature diameter and T / D ratio) on the saturated bubble boiling heat transfer coefficient in the vertical spiral tube were investigated. 　　Welded carbon steel pipe in the production, the wrong side occurs, its impact on many factors. In the production practice, often by the wrong side of the wrong side of the steel pipe downgrade. Therefore, it is necessary to analyze the cause of the spiral steel pipe misalignment and its prevention measures. 　　A...

　　A reducer is a type of pipe used for pipe caliber. The forming process usually adopted is a reduction press, a diameter expansion press, or a reduction diameter and a diameter expansion press. For some sizes of different diameter pipes, press forming can also be used. 　　Reduced diameter / expanded diameter forming 　　The reduction forming process of the large and small heads is to put a tube blank having the same diameter as the large end of the large and small heads into a forming mold, and to move the metal along the cavity and shrink and form by pressing in the axial direction of the tube blank. According to the size of the reducer of the reducer, it is divided into one press forming or multiple press forming. 　　 Stamping 　　In addition to the use of steel pipes as raw materials for the production of large and small heads, the size of the head can also be produced by stamping forming process. The shape of the die used for drawing is designed with reference to the inner surf...

　　Straight seam welded pipe is formed by strip forming of high-frequency welded pipe by strip steel, gradually forming steel pipe billet, then welding into steel pipe by high-frequency heating, scraping the outer burr by scraper, and finally producing the required shape by straightening and straightening sawing The size of the straight seam welded pipe . This is what we usually call the production of straight seam welded pipe. It is literally explained that the weld is a straight line. The difference between a welded steel pipe and a spiral welded pipe is that the weld of the spiral welded pipe is a spiral curve, but they are all welded. Steel Pipe. 　　The coiled tube is a steel sheet formed by a steel plate through a roller machine, and then welded into a steel pipe by submerged arc welding or electric welding, and then sizing to other shaping equipment. This tube is low in efficiency and the quality of the tube is small. Unstable, low dimensional accuracy, but less investment in equ...

　　Factors affecting measurement of pipeline straightness. 　　1. Improper adjustment of the straightening frame 　　Bending phenomenon: The erw steel pipe bends out from the sizing unit and is bent in one direction. 　　2, Uneven thickness of the coil 　　Bending phenomenon: The bending phenomenon of the steel pipe is serious, and the bending direction of the steel pipe is not one direction. 　　3, The temperature of the upper and lower surfaces of the steel pipe is uneven 　　Bending phenomenon: The steel pipe in production is straight after cutting, but it bends when cooling on the finishing stand, and the overall bending direction of the steel pipe is the same. 　　4, Insufficient sizing 　　Bending phenomenon: The steel pipe is straight before the hydrostatic pressure test, but the bending phenomenon occurs after the hydrostatic pressure test, and the bending direction is fixed. 　　 http://www.xysteelpipe.com/info/Factors-affecting-measurement-of-pipeline-straightness-1424-1.htm