ERW Steel Pipe

    Macroscopic analysis of cracking     Casing pipe crack direction for the horizontal, crack propagation along the circumference, the circumference of about 460mm. The flow can flow from the outer wall of the casing along the middle of the crack into the <24415mm casing, indicating that part of the crack has penetrated the casing wall thickness.     The main process of casing production is as follows:     Furnace refining → continuous casting → ring furnace heating → perforation → rolling → stepping furnace → sizing → sawing → quenching and tempering → straightening → physical and chemical testing → inspection → thread processing → coupling machine tight → water pressure test → Measuring length weighing, marking → packaging storage.     Wherein the continuous casting billet is fed into the annular furnace for about 2.5 hours and then perforated at about 1250 °C, followed by continuous rolling at a sizing temperature of 950 ...

    The steel billet is the product obtained by casting the molten steel produced by the steelmaking furnace. Steel billets from the manufacturing process can be divided into two types: die casting and continuous casting billet, the current casting process has been basically eliminated.     Continuous cast steel billet and rectangular billet mainly carbon steel, low carbon low silicon cold rolled material, high quality carbon structural steel, low alloy high strength steel, special steel as the representative.     Steel billet production process is following:     First, through the steel casting system of continuous casting equipment, directly from the molten steel into steel billet;     Second, the steelmaking system for the production of steel ingots or continuous casting slits through the rolling system of steel processing equipment out of semi-finished products;     Third, the steel production system of steel ingo...

    Notes of erw carbon steel pipe in winter:     First, when positioning welding to increase the welding current, slow down the welding speed, the appropriate increase in the positioning of the cross-sectional area and length, if necessary, preheat.     Second, the slope should not be outside the base material on the arc, arc to fill the need to fill the crater.     Third, as far as possible in the low temperature conditions for bending, correction and assembly of welding parts.     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.     Sixth, the entire weld should be continuous continuous welding, to avoid interruption.     According to the specific temperature adjustment of the thickness of the pipe, the actual appl...

    The P110 casing pipe has played an important role in well operation. They protect the well from the shallow and shallow layers of the well and can also support oil and gas well oil and gas delivery and drilling. Support the weight of the wellhead and other layers to prevent collapse. And to ensure the well drilling, well well after well completion of the well operation, to ensure that the pipeline can be well oil, gas pumped to the ground up.     As the lifeline of oil well operation, petroleum casing should have higher quality requirements. Because, if the pipeline is damaged under a special kind of reason, it will be possible to directly cause the oil well to reduce its production, or even cause the exploration well to be scrapped directly. Therefore, there are many requirements for the selection of casing pipe, the selection should be based on the different geological, underground pressure to the size of the purchase. Proposed in the purchase of casing pipe,...

    Do you know welded steel pipe has a big family? Today, Great Steel Pipe will introduce the main family member of welded steel pipe for all of you, and they are ERW steel pipe, LSAW steel pipe and SSAW steel pipe.     First of all, we will introduce the ERW steel pipe, it’s widely use for conveying the gas, crude oil and refined oil to the cites. With a short weld seam, high dimensional accuracy, uniform wall thickness, good quality of surface, can bear high pressure and other advantages. But the disadvantage is only can produce the small dimension and thin wall steel pipe, and the weld seam is easily to bring gray spots, not fused and groove corrosion defects.     Next one is SSAW steel pipe, the steel pipe with spiral seam that using strip coil as raw material, extrusion forming under normal temperature, and welding by automatic Double wire double-sided submerged arc welding process. The advantage is can produce a variety of diameter specifications...

    I believe there are many people thought the strength of carbon steel pipe is low. Yes, if the carbon mass fraction is beyond 1%, the strength of carbon steel pipe will decrease. But if the carbon mass fraction in the range of 0.05%-0.1%, the strength will increase with the carbon mass fraction, and it will also affect the hardness, ductility, toughness and weld-ability. Generally, we divide the carbon steel(carbon mass fraction in the range of 0.05%-0.1%) into low-carbon steel (WC ≤ 0.25%), medium carbon steel (WC0.25% -0.6%) and high-carbon steel (WC> 0.6%).     The low-carbon steel is known as mild steel, is widely used for engineering, machinery and architecture, such as bridges, buildings and embankments.     The medium-carbon steel is mainly used for manufacture the active parts that with high strength, such as air compressor, pump valve, impeller of steam turbine and shafts, worms, gears of heavy machine and etc.     The high-ca...

    API 5L? What is this? I guess many people like me will ask what that means when we know the API 5L first time. Today, Xinyue Steel Pipe sharing what is API 5L pipeline.     API 5L is a standard of pipeline that set up by American Petroleum Institute, if you want to use the 5L monogram, you must to apply for certification to the American Petroleum Institute headquarters, and the pipelines at this standard will print this logo if you got the approval. API 5L standard covers seamless steel pipeline and welded steel pipeline, which pipeline mainly use for conveying the oil, water, gas, and other fluids in the natural gas and oil industries. The API 5L standard not only use for pipelines, but also including steel material grade, such as GR.B，X42 ，X46，52，X56，X60，X65，X70 and etc.     API 5L pipeline is preferred in long pipelines due to its inexpensiveness, so it is widely used in gas, water and oil transportation, and it can resist to crack propagation, s...