ERW Steel Pipe

　　Low carbon steel pipe 　　Low carbon steel means that carbon content is from 0.10 to 0.30% low carbon steel easily accepted by various processing such as forging, welding and cutting, commonly used in the manufacturing chain, rivets, bolts, shafts, etc.. the finished product is low carbon steel pipe . It includes the most ordinary carbon structural steel, and part of high-quality carbon structural steel, mostly without heat treatment for engineering structural components, some by carburizing and heat treatment for the requirements of wear of mechanical parts. 　　Low-carbon steel is generally rolled into angles, channels, beams, steel pipes, steel strip or sheet steel for the production of various building components, container, box, furnace and farm machinery. The high-quality low-carbon steel is rolled into sheets, making the the cab car hood deep drawing products; rolled into bars for less demanding mechanical parts production strength. Low carbon steel is generally not by heat tr...

　　Large-diameter spiral steel pipe is that spiral pipe?that use steel strip coil as raw material, often warm extrusion molding, two-wire double-sided submerged arc welding(dsaw) process automatically welded. raw material is strip volume, wire, flux. The input to go through need rigorous physical and chemical testing. Strip head and tail docking, using a single wire or twin-wire submerged arc welding and automatic submerged arc welding rolled into the steel pipe. Prior to molding, strip is through flattening, cutting, trimming, edge planing, transportation and to the curved side surface cleaning. Electric contact pressure gauge to control the conveyor on both sides of pressing cylinder pressure to ensure the smooth delivery of the strip. The external control or internal control roll forming. Weld gap control device to meet the welding requirements ensure that the weld gap, diameter, misalignment and weld gap have been strictly controlled. Within the weld and outside welding Lincoln wel...

　　Common tubing buckle types Common tubing buckle types are divided into three types: EU, NU and NewVam. These three types of buttons can be found in the tool workshop. Among them, EU and NU are difficult to distinguish from the appearance of the buttons. Both are button types, but they can be easily distinguished from the entire pipe string. That is, EU means outer NU Indicates no external thickening. New Vam is actually a trapezoidal buckle (the cross section of the buckle is rectangular), and it is not thickened with outside, so it is easy to distinguish.N80 petroleum casing is an important equipment for petroleum drilling. The main equipment includes drill pipe, core pipe and casing, drill collar and steel pipe for small diameter drilling. In order to meet the needs of different environments and different enterprises, there are multiple types of tubing 　　N80 oil casing. Including straight-connected buckle petroleum casing, small-caliber thin-walled petroleum casing, outer thicken...

　　 Steel pipe elbow is an important parts in plumbing pipeline systems and used to change the fluid directions. It ranges in different types as per body material there are stainless steel elbow, carbon steel elbow, and alloy steel; As per fluid directions there are 45 degree , 90 degree elbow and 180 degree; As per elbow length and radius there are short radius elbow (SR elbow) and long radius elbow (LR elbow); As per connections types there are butt weld elbow, socket weld elbow and threaded steel piping elbow. 　　90 Degree Steel Pipe Elbow 　　90 degree steel pipe elbow is to change fluid direction by 90 degree, also called the vertical elbow, it is the most used type in all the pipeline systems, since it is easy to compatible with the steel construction and structural. 　　? 90 degree elbow of long radius 　　This kind of 90 degree steel pipe elbow is installed between different lengths of pipe or tubing. 　　It helps to change the direction at an angle of 90 degrees. It’s often u...

　　The manufacturing process of flange mainly is divided into forging, casting, cutting and rolling. 　　The casting and forging flanges have advantages that the blanks of them have accurate shape, size and low costs and only need simple process. But forging flanges have manufacturing defects such as blowholes, cracks, etc and have not very smooth internal organization streamline. The obvious advantages of forging flanges are that they can be forged in various shapes and they have low costs. 　　Forging flanges generally have lower carbon content than the casting flanges and are not easy to rust. They have smooth streamline, uniform internal organization, and better mechanical performance than that of casting flanges. There are no defects, such as blowholes and cracks existing in the casting flanges. Forging flanges are able to withstand higher shear and drawing forces than casting flanges. However, if adopting improper forging process, it will also cause appearance of large, uneven gr...

　　The technical performance test of seamless steel tubes can be tested through four aspects: hydraulic test, flattening test, bending test, and flare test, to test the applicable ability of the steel pipe in the subsequent processing and manufacturing process. Commonly used process performance tests include water pressure, squashing, bending, and flaring tests. 　　(1) Hydraulic test: The steel pipe under test is filled with water of a certain pressure, and the pressure is maintained for a certain time (the test pressure value and the stabilization time are determined according to the standard), and there is no leakage. This test is a non-destructive test and is often used for full product inspection. 　　(2) Flattening test: Place the steel pipe sample between two flat fixtures, and apply the force between the fixtures to achieve the standard value, and check that the sample deformation zone is free of cracks, cracks and other defects. 　　(3) Bending test: Put the steel tube sample o...

　　For seamless pipe heat treatment, the defects are as follows: 　　① surface decarburization is caused by improper heat treatment operations, the defect reduces the hardness of the surface of the seamless steel pipe spot, stress inconsistent cooling process inside and outside the organization, making it easy to produce seamless steel pipe spot quenching cracks, while reducing the fatigue strength and service life. 　　② low hardness resulting in seamless steel pipe spot deformation or bending in the service process, affecting its normal work. 　　③ direct quenching cracks unusable. 　　④ link inhomogeneity affect machining accuracy and reduce the mechanical strength of the matrix; likely to cause quench cracking seamless steel pipe spot; hardness inconsistent with discontinuity caused by the deformation of seamless steel tubes spot. 　　For seamless steel spot intensive shot peening, the surface of the material to produce severe plastic deformation, crystal lattice distort...

　　In general, iron contains a certain amount of carbon because of the process. mild steel has a certain small range of carbon to provide greater hardness than if there is too little or too much carbon. Galvanization is a process that coats iron or steel with a zinc layer that protects it from corrosion while the zinc lasts. Pure iron (no carbon) is very ductile and cast iron (considerable carbon is brittle). 　　Mild steel is much stronger that plain iron, plain iron is not commonly used, steel is iron with carbon in it, mild steel has other alloys in it as well like maganese, silcon, copper, the higher the carbon content, the stronger it gets (usually heat treated). 　　Galvanized means it's coated with zinc to prevent corrosion (rust). The zinc becomes the sacraficial anode. What happens instead of orange rust is a white powder - lasts for long time. 　　Manufacturing Process: These basic input for galvanized mild steel tube manufacturing is continuous strip of Hot rolled (H.R) l...

　　The so-called fake seamless is often said the seamless steel pipe . 　　Seamless steel pipe reducing tension, tension-reducing process is a continuous rolling process without mandrel in hollow base material. 　　Under the premise of ensuring the main pipe welding quality, pipe tension reducing process heated to 950 degrees Celsius, then the tension reducer rolling a seamless steel pipe diameter and wall thickness of the finished product, this the essential difference between the process of the production of hot-rolled steel with high frequency welded pipe through the furnace heated the microstructure and mechanical properties of the weld with the parent can achieve exactly the same addition, multi-pass tension reducing mill rolling Built and automatically controlled so that the dimensional accuracy of the steel pipe (especially roundness and thickness accuracy) of the tubular body is superior to similar seamless. Developed countries in the world production of fluid pipes, boiler tube...

　　Petroleum casing pipe can be roughly divided into 4 types according to different usage methods: surface casing, intermediate casing, production casing, and drilling casing. 　　Surface casing is mainly used to suspend and support the subsequent layers of casing through a casing head installed on the top. Another is to isolate the shallow surface water layer from the complex formation in the front to protect the drilling well from pollution by the shallow water layer. 　　Intermediate casing or technical casing is used to isolate strata of different formation pressures or complicated formations that are easy to collapse and leak. 　　The production casing is used to protect the production layer, as well as the channels provided for transporting oil and gas from the production layer to the surface. 　　The drilling casing is used to reduce the load of the drilling rig and the post-casing load during casing and after cementing, saving casing and cement and reducing the cost of cementing...

　　Removal methods of anti-corrosion ssaw steel pipe include mechanical method, chemical method and electrochemical method. Due to the complexity of the scale composition of the anti-corrosion spiral steel pipe, it is not easy to remove the surface scale and achieve a high degree of cleanliness and smoothness. What are the removal methods? 　　Removal of the anti-corrosive spiral steel tube oxide scale generally requires two steps. The first step is pretreatment and the second step is ash removal. 　　Anti-corrosion spiral steel pipe pre-treatment makes the oxide scale loose, and then pickling is easy to remove. Pretreatment can be divided into the following methods: alkaline nitrate melting treatment. Alkaline melt contains 87% hydroxide and 13% nitrate. The proportion of the two in the molten salt should be strictly controlled to make the molten salt have strong oxidation power, lower melting point and lower viscosity. In the production process, only the sodium nitrate content is not ...

　　Scaffolding products, one of the most widely used engineering equipment in construction. No matter scaffolding plank, or other relative products, they are mainly made by main frame, diagonal rod, connecting pin, foot plate and other components. Nowadays, we figure out that it has more and more importance for our various building projects. 　　Compared with ancient helpers for engineering project, we will find out that scaffolding products would have its special places. 　　First of all, lightweight is its obvious advantage which makes it is convenient for workers to carry and build. 　　Second, if we use scaffolding products like door structure, this is very easy for workers to pass or climb. Under this situation, it would save time for workers. 　　Third, with its special construction, it will provide customer fast construction speed once used among various engineering projects. 　　Forth, high cost performance would make it best sell among the market. With small space, and long us...

　　As we know, the galvanized steel pipe has been coated with a protective layer of zinc which provide strong protection against rust and more strength than other steel and iron tubing. The process of galvanizing is to remove the iron oxide from the surface of the steel tube by pickling, then putting it into an aqueous solution of zinc chloride or an aqueous solution of ammonium chloride and zinc chloride, and then dipping it into a bath of molten zinc, or a zinc-rich electrolyte. The zinc reacts with oxygen to create zinc oxide layer that further reacts with carbon dioxide to create zinc carbonate to prevents corrosive substances from reaching the underlying steel or iron. 　　The galvanized pipe was been widely used in outdoor and indoor applications due to its anti-rusting performance. In agricultural production, galvanized steel pipe is more and more widely used in greenhouse, cultivation and horticultural frame. The frame of the greenhouse is made of galvanized thin-walled steel p...

　　Cold drawn precision seamless steel pipe is used for mechanical structure, hydraulic equipment, high dimensional accuracy and good surface finish of cold drawn precision seamless steel pipe. Selection of precision seamless steel pipe manufacturing mechanical structure or hydraulic equipment, can be significant savings in machining working hours, improve material utilization, and at the same time help to improve the quality of products. 　　Cold drawn precision seamless steel pipe is a high-precision steel pipe material by cold drawn treatment. Precision steel pipe inside and outside wall oxide layer to withstand high-pressure leak-free, high-precision, high-quality finish, cold-formed deformation, flaring, flattening cracks bit, mainly used for the production of pneumatic or hydraulic components, such as cylinder or cylinder, can be a seamless pipe, a welded pipe (after the cold rolling process). 　　Process Description: high-quality carbon steel, refined pull, oxidation bright heat...

　　The detection methods of oil casing pipe are: 　　1. Ultrasonic inspection 　　When the ultrasonic wave propagates in the tested material, the acoustic characteristics of the material and changes in the internal tissues have a certain effect on the propagation of the ultrasonic wave. The degree and condition of the ultrasonic wave are detected to understand the changes in the properties and structure of the material. 　　2. Ray inspection 　　Radiographic inspection is based on the difference in the amount of radiation transmitted through the normal part and the defect, resulting in a difference in blackness on the negative. 　　3. Penetration testing 　　The penetration test uses the capillary action of the liquid to infiltrate the penetrating liquid into the open defects on the surface of the solid material, and then suck the penetrating penetrating liquid to the surface through the imaging agent to show the existence of defects. 　　4. Magnetic particle detection 　　Magnetic part...