LSAW Steel Pipe

 There are many ways to cut carbon steel tubes, such as oxyacetylene gas cutting, air plasma cutting, laser cutting, wire cutting, etc., can cut carbon steel. There are four common cutting methods: (1) Flame cutting method: This cutting method has the lowest operating cost, but consumes more fluid seamless tubes and the cutting quality is poor. Therefore, manual flame cutting is often used as an auxiliary cutting method. However, due to the improvement of flame cutting technology, some factories have adopted multi-head flame cutting machine automatic cutting as the main method for cutting fluid carbon steel seamless tubes. (2) Shearing method: This method has high production efficiency and low cutting cost. Medium-carbon seamless tubes and low-carbon alloy structural steel tubes are mainly cut by shearing. In order to improve the shearing efficiency, a large-tonnage shearing machine is used for double shearing; in order to reduce the flattening degree of the end of the steel tube d...

 Carbon steel tubes consist of an iron and carbon alloy that is able to be bent into shapes during manufacture without reducing its high tensile strength. It is important to protect the steel surface from corrosion due to the iron ferrite composition that will rust through oxidization from water contact. The pipework that supplies fire sprinkler systems is often carbon steel, and requisite strength components such as cam and crank shafts in aircraft and cars use carbon steel tubes and tubing. Painting carbon steel tubes to effectively avoid corrosion requires the use of the correct primer and paint. 1. Use wire wool and remove all surface rust from the carbon steel tube. Sweep up any rust particles using a hand brush to keep the work area clear of dust. 2. Use a solvent-based cleaner and a cloth to scrub off all grease and oil stains from the surface of the pipe. Wipe the cloth over the entire surface of the pipe to collect any dust or rust particles that remain. Allow the carbon s...

　　Corrosion is one of the main reasons for the damage and failure of buried pipelines. For the long-distance pipeline and centralized pipeline network of natural gas transmission, the corrosion of buried pipelines cannot be directly discovered and is inconvenient for maintenance. How to prevent corrosion damage is a key factor of pipeline safety engineering. According to the corrosion part, the corrosion of buried carbon steel pipe can be divided into internal corrosion and external corrosion. 　　Internal Corrosion 　　The internal corrosion of pipeline is caused by corrosive chemical components in the transported medium. Different medium cause different corrosion factors. For example, natural gas is high in H2S, CO2, water content and dust, which may lead to perforation and burst accidents. The internal corrosion of pipeline is not only the result of multiple external factors, but also related to pipeline material and manufacturing method, as well as stress. 　　External Corrosion ...

　　Flat weld flanges are flanges that are welded directly to equipment or piping by fillet welds. The structure is simple and the processing is convenient. The force characteristics are between the integral flange and the looper flange. The flat weld flange is divided into a plate type flat weld flange and a neck flat weld. The flat weld flange has low cost and short production cycle, which is the most commonly used. A flange type that is widely used in various fluid lines. 　　Flat welding flange has a beautiful shape and a smooth and smooth appearance. It is mainly used for the connection of carbon steel pipes , and its nominal pressure does not exceed 2.5 MPa. 　　Flat welding flange is resistant to acid and alkali, anti-corrosion, and strong in texture. It is made of i-oxygen furnace, and the whole forging or forging product is forged and formed by high-precision CNC lathe turning and CNC rocker drilling. 　　The joint method of the flat welding flange includes single-sided welding ...

　　When describing the parameter for the steel tube, we usually do it using the tube ID. It is a method that expresses the wall thickness of the tube in numbers. However, the tube ID (SCH) is not equal to the wall thickness, but represents that tube within a series of a certain thickness. Different IDs mean different wall thicknesses for steel pipes with the same diameter. The most frequent indicators of the pipeline are SCH 5, 5S, 10, 10S, 20, 20S, 30, 40, 40S, 60, 80, 80S, 100, 120, 140, 160. The higher the number in the table, higher is its resistance to pressure. 　　What does Steel Pipe Schedule 40 and Schedule 80 mean 　　If you are someone new to the pipe industry, you may be wondering: Why do you always see ID 40 or 80 when talking about steel pipes? What type of material is used in these tubes? 　　As you can read in the previous sections, ID 40 or ID 80 represents the wall thickness of the tube, but why are these two the most preferred by consumers? 　　Here is the reason: 　...

　　The first thing to consider about carbon steel pipe is simply what it is. Carbon steel pipe is pipe comprised of carbon steel. But what is carbon steel? Here’s how the American Iron and Steel Institute defines it: 　　Steel is considered to be carbon steel when no minimum content is specified or required for chromium, cobalt, niobium, molybdenum, nickel, titanium, tungsten, vanadium or zirconium, or any other element to be added to obtain a desired alloying effect; when the specified minimum for copper does not exceed 0.40 percent; or when the maximum content specified for any of the following elements does not exceed the percentages noted: manganese 1.65, silicon 0.60, copper 0.60. 　　Simply, carbon steel is steel in which the main alloying component is carbon. Interestingly, most of the world’s steel falls into this category. 　　What are the different types of carbon steel pipe? 　　Carbon steel is classified according to how much carbon has been mixed with the base element, iro...

　　 Carbon steel pipe is one of the most popular piping materials in the world. And for good reason: it has many advantageous characteristics. 　　Let’s take a look at some of those characteristics and the applications that they make carbon pipe particularly well suited for. 　　Shock Resistance 　　Carbon pipes have a tremendous ability to withstand shocks and vibrations. While other materials may succumb in such environments, carbon pipes are able to maintain their integrity and performance in even the most jarring conditions. 　　This makes carbon pipes and welded carbon pipes particularly useful in the transportation industry. Pipes laid under roadways can experience extreme shocks and vibrations from the heavy traffic above. Carbon pipe, with its ability to withstand shock, is a great choice for such situations. 　　Tensile Strength 　　Carbon steel can endure very high pressures. This gives carbon pipes an excellent carrying capacity, meaning that, pound for pound, they can carry...

　　 Durability 　　Steel is one of the most popular types of pipe fittings and has been used for construction of pipes and pipe fittings for years because of its durability and strength. However, carbon steel, or plain-carbon steel, has the ability become much stronger through heat treatment. The more carbon added to the steel, the stronger it can become, which is why it is considered one of the strongest types of steel. Another way to increase the durability is to create a harder surface by adding a layer of chromium. Chrome plated pipe fittings are not only durable, but prevent corrosion and may also make the cleaning process much easier. 　 　Multi-purpose 　　 Carbon steel pipe fittings are typically used for industrial purposes such as commercial construction, electric-power, petroleum refinement and the building of ships, but are also often seen in the household. They are used for fire sprinkler systems and pipes carrying water, types of flammable gasses, oil or steam. Because of...

　　 Carbon steel pipe manufacturer in China was informed from last week, more than in response to continuous haze weather, emergency introduction of a series of initiatives. For example, the 17th night, Shijiazhuang municipal government introduced a series of emergency measures, from November 2016 to December 31, 2016, the main city of motor vehicle odd and even number limit line, pipe and other seven major industries all stop production, the units Wrong when to get off work. At the same time, Taiyuan, Shanxi Province, November 17 night release of heavily polluted yellow weather warning, which is the city since the beginning of winter issued the first yellow warning. Pipe, coking, electricity and other key industries and enterprises to limit production limited row, the focus on polluting enterprises 24-hour factory inspection, all urban housing construction, demolition construction, municipal, roads and other sites to stop earthwork operations. 　　Steel production impact will be affec...

　　Before choosing which type of metal to use for an industrial project, the first thing that you should consider is the magnitude and scale of the task, what type of liquid or gas the pipes will be carrying and the longevity of structure. Once that has been established, you can then answer questions to what type of metal to use for the piping. 　　For example, due to its strength and versatility, steel is one of the most popular materials used for pipe and pipe fittings. Even better, different material, like carbon or chrome, can be added to steel to obtain a specific desired effect. Here are a few reasons why it may be beneficial to invest in carbon steel pipe fittings and valves for your next commercial project. 　　1. Super Strength 　　Because of its strength and durability, steel has been one of the most commonly used materials for industrial piping and other types of construction. However, with the addition of carbon to the already strong metal, it has the ability to turn into a ...

　　The hardness of carbon steel pipe commonly used Brinell, Rockwell, Vickers hardness of three kinds of indicators to measure. 　　Brinell hardness 　　In the steel standard, it is the most widely Brinell hardness, often expressed in the indentation hardness of the material in diameter, both intuitive and convenient. However, for a hard steel or steel thin NA. 　 　Rockwell hardness 　　Rockwell hardness test tube with Brinell hardness test, as are the indentation test methods. The difference is that it is a measure of the indentation depth. Steel Rockwell hardness test is a very wide application, wherein after the Brinell hardness HB HRC use in steel standard. Rockwell applicable to the determination by the extremely soft to extremely hard metal materials, which make up not Brinell method, compared with Brinell method is simple and can be read directly from the dial hardness machine hardness value. However, because of its small indentation, the Brinell hardness values better method i...

　　Carbon steel pipes can be classified into low carbon steel, medium carbon steel and high carbon steel according to chemical composition (ie, carbon content). Low carbon steel, also known as mild steel, contains from 0.10% to 0.30% carbon. Low carbon steel is easy to accept in various processes such as forging, welding and cutting. It is commonly used in the manufacture of chains, rivets, bolts, shafts, etc. 　　Medium carbon steel refers to carbon steel with a carbon content of 0.25% to 0.60%. There are a variety of products such as killed steel, semi-killed steel, boiling steel. In addition to carbon, it may contain a small amount of manganese (0.70% to 1.20%). In addition to being used as a building material, it is also used in large quantities to manufacture various mechanical parts. High carbon steel is often called tool steel and contains carbon from 0.60% to 1.70%. Such as drill bits, wire taps, reamers, etc. are made of steel with a carbon content of 0.90% to 1.00%. 　　Introd...

　　ASTM A179 cold drawn seamless carbon steel pipe is mainly used in various sectors of the metal structure facilities, mainly after the rust of steel pieces immersed in 440 ~ 460 ℃ melting zinc solution, so that the steel surface attached to the zinc layer, which play a preservative purpose. This is an effective way of metal corrosion, the use of the main features are the following: 　　1. ASTM A179 cold drawn seamless pipe manufacturers with thick dense dense zinc layer covered in the cold drawn seamless tube surface, it can avoid cold drawn seamless tube matrix and any contact with the corrosion solution to protect the steel matrix from corrosion. In the general atmosphere, the surface of the zinc layer to form a layer of thin and dense zinc oxide surface, it is difficult to dissolve in water, so the steel matrix plays a protective role. If zinc oxide and other components of the atmosphere produce insoluble zinc salt, the anti-corrosion effect is more desirable. 　　2. With iron - z...

　　ASTM steel pipe, one of the seamless steel pipe , named by American Society for Testing and Materials, would be categorized by original materials. Thus, there are so many ASTM grades for this kind of steel tubes. 　　Basically, alloy, stainless steel and carbon would be the main materials leading to the different grades for it. And this would finally decides the steel pipe’s properties, hardness, resistance to corrosion, pitting, heat treating processes and others. Here are some common grades for it. 　　ASTM A106: It covers carbon steel pipe, so it can be used widely among high-temperature service. 　　ASTM A335: This kind of type covers seamless ferritic alloy-steel pipe, which is used for high-temperature service. 　　ASTM A333: It covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. 　　ASTM A312: This specification would be functioned for seamless, straight-seam welded, and cold worked welded austenitic stainless steel pipe intended f...

　　Spiral pipe surface quality problems mainly in the surface oxide thick, surface cracking, heavy leather surface, surface mechanical bumps and so on. Hot-rolled carbon steel pipe after completion, after, or cold-rolled steel and then heat treated, will form a layer thick and strong adhesion, high temperature oxide. The presence of oxide steel look not only poor quality, also affect the use of steel, which is the standard are not allowed. Such oxide with the general sandblasting is difficult to remove, to use pickling or mechanical polishing method to clear. 　　Mechanical bruising is the most common quality problems, arising primarily from the production, handling and transportation. Pipe bumps are formed at a structural discontinuities, use is a source of stress concentration, but also chipped sensitive. Compared with crack, mechanical defects bruised outline clear, do not involve injuries metal, so the standard allows some bumps depth exist, but in some of the more sensitive applica...

    Carbon steel can be divided into 10# 20# A3 Q235A 20g Q345B 20g 16Mn ASTM A234 ASTM A234 ASTM A403 et, and the elbow part made of these materials can be called carbon steel elbow.     According to the angle: 45°, 90°, 180°, these three commonly used elbows, and other engineering needs, can be specially customized such as 60 ° or other angles.     Connection with carbon steel pipe : welding, flange connection, screw connection, socket connection and other forms.     According to the process form can be divided: welding elbows, stamping elbows, casting elbows and so on.     Uses: Connect two tubes to change the direction of the tube, turning to 45° or 180° and 90° or other angles.     Manufacturing standards: national standard, American standard, Japanese standard, German standard, and Russian standard.     The basic process of a carbon steel elbow is to first weld a multi-prism ring shell with a polygon...

    ERW carbon steel pipe with this processing technology has the advantage of heat treatment after welding process to eliminate the weld and heat-affected zone of the residual stress, grain refinement, weld heat affected zone is small, heating speed, which can greatly improve the welding speed and weld quality, and can be un-pickled, shot peening and trimming the strip as a blank, while welding alloy steel, high alloy steel and non-ferrous metal pipe, greatly reducing the unit power consumption, with a set of welding equipment can produce erw carbon steel pipe.     But at the same time, for the erw carbon steel pipe unit, the larger the diameter, the more it is limited by the strip weight and the wall thickness of the raw material, the storage equipment is limited by the spiral looper. In addition, the erw carbon steel pipe unit has a higher linear velocity, arc welding pipe speed is generally 3m / min, do not match each other. Therefore, erw carbon steel pipe uni...