steel pipe

　　The application of carbon steel pipe : 　　1. Carbon steel pipe for mechanical industry. Carbon steel pipe can be used as aerospace pipe ( tube elliptical tube), automobile exle tube, axle tube, automobile tractor structure tube, tractor oil cooler tube, agricultural machine square and rectangular tube, transformer tube, bearing tube ect. 　　2. Petroleum geological drilling pipe. Carbon steel pipe can be used as oil drilling pipe, oil drill pipe, hexagonal drill pipe, oil tubing, oil casing and various pipe joints, geological drilling pipe (core pipe, casing, active drill pipe) etc. 　　3. Chemical industry tube. Carbon steel pipe can be used as oil cracking tubes, chemical equipment tube, heat exchangers tube, stainless steel acid tube, chemical fertilizer tube, high pressure pipe ect. 　　4. Line pipe. Carbon steel pipe can be used as water pipe, gas pipe, steam pipes with seamless tube, oil pipeline, oil and gas trunk pipe, agriculture irrigation tap with a pipe and sprinkler pip...

　　The API SPEC 5L specification provides standards for pipe suitable for use in conveying gas, water, and oil in the natural gas and oil industries. The API SPEC 5L covers seamless and welded steel line pipe . It includes plain-end, threaded-end, and belled-end pipe, as well as through-the-flowline (TFL) pipe, and pipe with ends prepared for use with special couplings. 　　PRIME STEEL PIPE API 5L steel pipe comes in a variety of wall thicknesses and is manufactured domestically, to order, to meet our customer’s particular application requirements. We offer both seamless and welded (ERW*) to meet the particular challenges of all transmission environments. 　　Line pipe grade designations come from API Spec 5L Specification for Line Pipe. Standard Line Pipe has grade designation A and B. Stronger grades have the designation X followed by the specified minimum yield strength of the pipe steel, measured in kilopounds per square inch (abbreviated ksi), e.g. X60 for pipe having a minimum yie...

　　A234 WPB steel pipe fittings is type of steel pipe fittings made by the material of ASTM A234 WPB. A234 steel pipe fittings are used for the pressure piping systems of moderate and high temperature services. ASTM A234 is the standard of pipe fittings material , it indicates the materials properties of different kinds of carbon steel and alloy steel, WPB is one of the steel grade in this standard . W means weldable, P means pressure, B is grade b ,refer to the minimum yield strength , like the astm A106 A53, Gr.B or API 5L Gr.B. A234 WPB is the most common carbon steel pipe fittings material . 　　A234 WPB pipe fittings are butt welding ends , commonly used to be welded with the steel pipes of A106, A53, GR.B material, or API 5L GR.B material. 　　Type of the ASTM A234 WPB steel pipe fittings : The regular products of A234 WPB pipe fittings are elbows, tees, reducers, caps, cross . There are seamless and ERW A234 WPB pipe fittings, the seamless A234 WPB pipe fittings means the fittin...

　　According to the ANSI B36.10 america standard 　　 Seamless steel pipe wt grade: Sch10, Sch20, Sch30, Sch40, Sch60, Sch80, Sch100, Sch120, Sch140, Sch160 ten grades; 　　1) ANSI B36.19 wall thickness grade: Sch5s, Sch10s, Sch40s, Sch80s (usually used for stainless steel) four grades; 　　2) According to the wall thickness of steel pipe, China, ISO, and Japan 　　3) The thickness of the pipe wall is expressed by the weight of the pipe, which divides the wall thickness of the pipe into three types: 　　a. Standard weight tube, expressed in STD 　　b. Thickened tube, expressed in XS 　　c. Extra thick tube, denoted by XXS. 　　For example: 　　For pipes with DN ≤ 250mn, Sch40 is equivalent to STD, DN<200mm pipe, Sch80 is equivalent to XS and sch20. These are the corresponding grades. The table can be found in millimeters. For example, DN200 sch20 wall thickness. The American standard thickness is 6.35 mm. 　　http://www.xysteelpipe.com/info/Seamless-steel-pipe-wt-class-1444-1.htm

　　The most regular NDT methods are as follows: 　　Penetrant Testing:4xac 　　Penetrant solution is applied to pipe fittings or flanges cleaned surfaces.The liquid is pulled into cracks or defects by capillary action.Excess penetrant material is carefully cleaned from the surface.A developer is applied to pull the trapped penetrant material back to the surface where it is spread out and shows an indication.This indication is much easier to find than the crack or defect. 　　Magnetic Particle Testing 　　A magnetic field is established in a pipe fitting made from ferromagnetic material.The magnetic lines of force travel through,exit and reenter the material at the poles.Defects such as crack or voids cannot support as much flux,and force some of the flux outside of the part.Magnetic particles distributed over this pipe fitting will be attracted to areas of flux leakage and shows a visible indication. 　　Ultrasonic Testing 　　When the quality checker use a transducer to send the high ...

　　 Seamless steel pipe with small outer diameter can be called as small-diameter seamless steel pipe. Small-diameter seamless steel pipe can also be divided into: seamless small-diameter steel pipe and straight seam (also called welding) small-diameter seamless steel pipe. In the outer diameter, steel pipe of 89 mm or less, 4 mm or more, can be collectively referred to as a small-diameter seamless steel pipe. The small-diameter cold-drawn seamless steel pipe is a circular, square, rectangular steel with a hollow section and no seam at the periphery. It's formed by perforating a steel ingot or a solid tube blank, and then hot rolled, cold rolled or cold drawn. The seamless steel pipe has a hollow section and is used as a pipe for conveying fluid. Compared with a solid steel such as round steel, the steel pipe is light in weight when it has the same bending and torsional strength, and is an economical section steel, which is widely used in manufacturing structures, parts and mechani...

　　(1) Raw materials are strip coils, welding wire, flux. Strict physical and chemical testing is required before input. 　　(2) The steel head and tail are butt jointed, and the single wire or double wire submerged arc welding is used, and the automatic submerged arc welding repair welding is adopted after being rolled into a square pipe. 　　(3) Before forming, the strip is leveled, trimmed, planed, surface cleaned and pre-bent. 　　(4) The electric contact pressure gauge is used to control the pressure of the cylinder on both sides of the conveyor to ensure the smooth conveying of the strip. 　　(5) Adopt external control or internal control roll molding. 　　(6) The weld gap control device is used to ensure that the weld gap meets the welding requirements, and the pipe diameter, the amount of misalignment and the weld gap are strictly controlled. 　　(7) Both internal and external welding are performed by single-wire or double-wire submerged arc welding using a Lincoln welding machi...

　　Advantages of erw steel pipe compared with seamless steel pipe are following below: 　　A) High dimensional accuracy. ERW steel pipe diameter and wall thickness than the seamless steel pipe deviation is much smaller, because the strip rolling and pipe forming easy to control, so high dimensional accuracy. 　　B) Good mechanical properties. As the ERW steel pipe with easy control of rolling, with the welding technology and on-line heat treatment technology, the performance of the weld can be controlled, so straight seam welded steel pipe elongation than seamless steel pipe 8% -10% higher, which Is because the straight seam electric-welded pipe carbon content of less than 12% lower than the seamless tube. 　　C) ERW steel pipe with high concentricity, uniform wall thickness. Weld after heat treatment, microstructure uniform, with a strong ability to collapse collapse. 　　D) As the extension of the steel is good, straight seam sewing machine sister pipe flattening test is better than ...

　　 ERW steel pipe manufacturers, in the production of high-frequency welded pipe process, will face the tube surface was scratched the situation, the main reason for this is due to the guide roller and squeeze roller caused. The following specific analysis. 　　1. Scraping caused by the guide roll generally occurs on both sides of the high-frequency welded pipe, the characteristics of the wound is relatively large, continuous strong. Reasons include: 　　(1) The height of the guide sleeve position is not correct, such as the guide roller bearing damage, the guide roller can not be a good control of high-frequency welded pipe, so that friction with the guide sleeve caused by scratches. 　　(2) When the guide roll deviation from the high-frequency welded pipe production line rolling center line is too large, the guide sleeve and guide roller relative difference is too large, resulting in both sides of high-frequency welded pipe scratches. 　　2. Scratches caused by high-frequency weldin...

　　Advantages of galvanized pipes is following below: 　　Firstly,galvanized pipe after being hot dip galvanized surface can be protected,and insied the cavity of the pipes or any ohther coating the corner is difficult to enter,deepen the zinc can easily cover to the top,make whole galvanized pipe can be protected. 　　Second,after being galvanized pipe galvanized its impact resistance and anti-wear properties are very good,because the zinc coating hardness values larger than the hardness of steel,and therefore the impact resistance of hot-dip galvanized after and resistance is quite good.Furthermore galvanized biggest advantage is in the corner of the zinc layer will be relatively thick and good toughness and abrasion resistance,while other coatings are often in this corner of the thinnest most difficult construction,and therefore are vulunerabale injury. 　　Third,there is a major feature of hot-dip galvanizing that is occasionally subject to considerable mechanical damage or other c...

　　This article introduces several major types of welded pipes , including their applications and standards in detail. 　　1.Welded pipe for delivering low-voltage fluid (GB/T3092-1993). This kind of pipe also known as general welded pipe, or black pipe, which is mainly used for delivering low-voltage fluid, including water, oil and gas etc. The specifications of pipe are presented by nominal diameter, which is the approximation of inner diameter. Traditionally, the diameter is expressed by inches, such as 11/2 etc. Besides directly delivery fluid, the pipe is widely applied as raw pipe of galvanized welded steel pipe for fluid. 　　2. General carbon steel wire casing (GB3640-88). This kind of welded pipe is commonly applied in industrial and civil construction, and installation of electrical equipment, plays a role of a protector for electrical wires. 　　3.Straight seam welded steel pipe (YB242-63). This kind of pipe can be divided in to metric welded pipe, welded thin-walled tube and...

　　Notes in The Process of Spiral Steel Pipe Welding 　　Production process of spiral steel pipe is complex, but it is one of the most popular steel pipes because it can be used widely. Spiral steel pipes are produced through welding process, then what issues should be noticed in the welding process? Let’s find out these questions one by one. 　　Straight seam welded pipes are simple-produced with high efficiency, low cost and rapid developed. The strength of the spiral welded pipes is generally higher than that of seam welded pipes and narrow billet can be used to produce larger diameter welded pipes, besides, the same width billet can be used to produce welded pipes of different diameter. But compared with straight seam pipes of the same length, weld length increases by 30 ~ 100%, and production speed is lower. As a result, small diameter welded pipes mostly adopt straight seam welding, while large diameter welded pipes mostly adopt spiral welding. 　　Notes in the process of spiral ...

　　 Carbon steel is unique in terms of qualities making it a sought-after material in different home or business construction projects. If carbon is the main alloying constituent, then it is called carbon steel. However, not all carbon steel products contain the same amount of carbon so there are different types based on the product's carbon content. They are as follows: 　　Mild Steel - This carbon steel product, like mild steel sheet, contains about 0.16% to 0.29% carbon. Mild steel is relatively cheap compared to other steel variants and can be used for many different applications. This material is commonly used for construction purposes which require large amounts of steel. 　　Medium Steel - This product is strong and has good resistance to wear and tear. Medium steel is commonly used for large metal structures as well as automotive components. 　　High Steel - As the name implies, this type has high carbon content and is mainly used for the manufacture of high-strength spring...

　　Steel comes in different grades that are determined by the amount of carbon, impurities and alloy elements. To guide you through, here are the main types of steel: 　　 Carbon steel 　　It accounts for over 90% of all steel produced. It contains only trace amounts of alloying elements and can be categorized into three groups that depend on the amount of carbon present. The main groups are: 　　Low carbon steel-contains 0.3% carbon 　　Medium carbon steel-0.3-0.6% carbon 　　High carbon steel-contains over 0.6% of carbon 　　 Alloy steel 　　This steel contains alloying elements such as silicon, nickel, titanium, chromium, aluminum, manganese, and copper. To manipulate the metal's properties, the alloying elements are available in varying proportions. This steel is majorly applied in pipelines, transformers, electric motors, auto parts, and power generators. 　　 Tool steel 　　This contains cobalt, molybdenum, vanadium, and tungsten which are available in varying amounts in order...

　　 Flange has been widely used for the connections between ends of the pipelines for considering about the convenience for assembly and disassembly. Actually, there is a variety of types with excellent functionality and inter-changeability. They all have been designed and manufacture to meet the generally increasing requirements. Some are used just for connecting, while some are applied to shut off or close the pipe. 　　The common main category used is called the pipe flanges. Although there are a lot of the available manufacturing standards, the pipe flanges are usually made to the standards called the ASME B16.5 or ASME B16.47. Depending on the characteristics of the forging materials, a wide range of the size and pressure class of this component has been manufactured. Besides, the vacuum flange is also popular in many aspects of the various industries. It is the kind which is placed at the end of a tube to connect vacuum chambers, tubing and vacuum pumps to each other. 　　Actuall...