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...