ERW Steel Pipe

    Features of seamless pipe     The thicker the wall thickness of a product, the more economical and practical it is. The thinner the wall thickness, the higher its processing cost. Secondly, the technology of the product determines its limited performance. Low: uneven wall thickness, low brightness on the inside and outside of the tube, high scale cost, and pits and black spots on the inside and outside are not easy to remove. Third, its detection and shaping must be processed offline. Therefore, it shows its superiority in terms of high pressure, high strength, and mechanical structural materials.     Seamless appearance quality     No cracks, folds, cracks, cracks, creases, delaminations, and scarring defects on the inner and outer surfaces of the seamless pipe should be completely removed (except for mechanical processing pipes). After removal, the wall thickness and external Diameter exceeds negative deviation. Other minor surface de...

    ERW steel pipe is a general name for resistance welded steel pipe. High frequency resistance welding (Electric Resistance Welding, ERW for short) is the first letter of the corresponding English word. Resistance welded steel pipes are divided into two types: AC welded steel pipes and DC welded steel pipes. AC welding is divided into low-frequency welding, intermediate-frequency welding, ultra-intermediate-frequency welding and high-frequency welding according to different frequencies. High frequency welding is mainly used for the production of thin-walled steel pipes or ordinary thick-walled steel pipes. High-frequency welding is divided into contact welding and induction welding. DC welding is generally used for small diameter steel pipes. Therefore, in general, the high-frequency welded pipe is included in the ERW welded pipe, which is an ERW welded pipe produced by the high-frequency welding process. ERW straight seam welded pipe is a steel pipe with advanced product p...

    The oil well casing gas is the oil separation gas that is led to the surface through the casing. The oil well is divided into two parts: the tubing and the casing. The tubing is the flow channel that the fluid is lifted to the surface after the pump works. The casing pipe is the flow channel outside the tubing.     An oil well casing is a pipe that goes downhole after drilling, the casing and the wall of the well are sealed with cement, and then a perforating gun is used to perforate the target layer to make the oil flow through the rock layer, cement ring, and casing. At the bottom of the well, enter the tubing to the surface. The main functions of oil well casing are:     1. Reinforce the well wall to prevent stratum collapse;     2. Seal different oil layers and water layers to realize layered production;     3. Facilitate the implementation of fracturing, acidification and other measures and maintenance operations; ...

    For large and sudden pipeline leakage accidents such as pipe explosion and breakage, due to the sudden pressure loss of the pipeline, it can generally be found in time, but on-site inspection is required to determine the specific location. For small leaks, leak detection technology is required. Leak detection technologies include offline detection and online monitoring.     Off-line inspection is a patrol inspection along the pipeline in a specified period or as required. It can be inspected on foot, by car, or by special aircraft. Leaks were found through observation of the ground surface, instrument detection or infrared imaging technology. Because the detection is not carried out from time to time, this method generally cannot be found in time after the leak occurs.     On-line monitoring is to use the leak monitoring system specially installed on the pipeline to dynamically monitor the pipeline, capture the leak information at the moment of the ...

    There are two main types of pipeline corrosion: internal corrosion and external corrosion.     External corrosion is mainly due to the corrosion caused by the connection of the pipeline material with the external environment such as soil, seawater, atmosphere and other corrosive media. At the same time, because some pipelines have an insulation layer outside, moisture may be caused under the insulation layer due to other factors Accumulation (sometimes because of the high temperature of the medium in the pipe causes the external moisture to heat up) causes highly corrosive corrosion areas that cause corrosion under the insulation layer of the pipeline.     Internal corrosion is different depending on the nature of the fluid in the pipeline. Including acidic corrosion, corrosion caused by chloride ions, microbial corrosion, stress corrosion, welding corrosion, etc.

　　How to distinguish poor quality seamless steel tubes 　　1. Fake steel tubes are prone to folding. 　　Folding is various fold lines formed on the surface of steel pipes. This kind of defect often runs through the entire longitudinal direction of the product. The reason for the folding is that the fake and shoddy manufacturers are pursuing high efficiency, the reduction is too large, and ears are generated. When the next rolling is performed, folding occurs. The folded product will crack after bending, and the strength of the steel is greatly reduced. 　　2. The appearance of fake and inferior steel pipes is often pitted. 　　The ramie surface is a defect of irregular unevenness on the surface of the steel due to the serious groove wear. Because the manufacturers of fake and inferior steel pipes are pursuing profits, they often appear to be rolling the most. 　　3. The surface of fake and inferior steel pipes is easy to produce scars. 　　There are two reasons for this: (1). The ...

    Features of seamless pipe     The thicker the wall thickness of a product, the more economical and practical it is. The thinner the wall thickness, the higher its processing cost. Secondly, the technology of the product determines its limited performance. Low: uneven wall thickness, low brightness on the inside and outside of the tube, high scale cost, and pits and black spots on the inside and outside are not easy to remove. Third, its detection and shaping must be processed offline. Therefore, it shows its superiority in terms of high pressure, high strength, and mechanical structural materials.     Seamless appearance quality     No cracks, folds, cracks, cracks, creases, delaminations, and scarring defects on the inner and outer surfaces of the seamless pipe should be completely removed (except for mechanical processing pipes). After removal, the wall thickness and external Diameter exceeds negative deviation. Other minor surface d...