SSAW Pipe

　　The seamless steel pipe manufacturing process starts with a solid, round steel billet. This billet is then heated to great temperatures and stretched and pulled over a form until it takes the shape of a hollow tube. All steel pipe suppliers will tell, there are three great advantages to making a pipe in this way. 　　 Increased Pressure Ratings 　　The greatest advantage of seamless steel pipes is their increased ability to withstand pressure. The weakest point in a welded steel pipe is the welded seam. But because a seamless steel pipe has not been welded, it doesn’t have that seam, making it equally strong around the entire circumference of the pipe. 　　It is also much easier to determine pressure calculations without being required to take weld quality into consideration. 　　Although seamless pipe can sometimes be more expensive than welded pipe, this increased ability to withstand pressure allows you to use pipes that are thinner and lighter, which can help cut down on expense...

　　 SSAW steel pipe in the production process, we need to pay attention to a series of matters. Except the following test items, according to the API standard and other relevant standards and the special requirements of some users, the destructive tests for steel, steel pipe is needed, including physical and chemical properties of the raw materials into the plant sampling, visual inspection of 100% steel . 　　A. Oiled marking: steel after passing were oiled to prevent corrosion, and according to user requirements for marking. 　　B. Leveling Milling: The flat steel anvil machine so that the original curl, and then through the edge milling machine for two-sided steel milling, so as to meet the requirements of the plate width, plate edge parallelism and groove shape. 　　C. Shear molding: the steel plate production line along the outer edge of the spiral curl into a tube. 　　D. Butt cut: double-sided submerged arc welding using advanced technology to pre-welding, internal welding, outs...

　　 Steel Pipe Pricing And Advantages Steel piping is a popular material in so many industries–from oil to automobiles, from shipping to food, from schools to hospitals and refineries. 　　Let’s look at some of the top reasons why engineers, builders, pipe suppliers and oil drillers love steel pipes and why they’re preferred in so many different applications. 　 　Heat Treatable 　　Some steel pipe are heat treatable, meaning that extreme temperatures can be used to modify their chemical and physical properties. 　 　Strength 　　Steel pipes have great tensile and stress-to-rupture strength, and they can maintain this strength even at high temperatures. 　　 Temperature Resistant 　　Steel pipes provide excellent resistance to oxidation at extremely high temperatures. And when chromium is added to the steel, it makes the steel even more temperature resistant. 　　 Welding Capabilities 　　Many grades of steel pipe can be welded into different shapes and sizes–giving them great versatil...

　　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...

　　 Galvanized pipe is pipe that has been coated with a layer of zinc. This coating protects the pipe from corrosion and rust, leading to increased longevity and enhanced reliability. 　　The zinc is often applied via a hot-dipping process, literally lowering the intended material—whether it is steel, aluminum or another metal—into hot zinc. This coating protects the pipe by corroding first when the pipe is out in the field, allowing the metal underneath it to stay intact and usable for a longer period of time. 　　Here are a handful of great reasons why you should choose galvanized pipes: 　 　Inexpensive Protection 　　Galvanization is often less expensive than other ways of protecting metal from corrosion. This is due to the fact that other methods often require intensive labor. Labor costs have risen steadily, which means the costs of these methods have risen as well. 　　 ASTM Galvanized Pipe Standardization 　　The ASTM has standards for many different types of galvanized pipes. ...

　　The transportation industry is very important to us and to the development of the entire country. Because only through transportation, it is possible to send things from all over the world to where they are needed. However, in the past, when transporting some liquids or gaseous substances, there was always a lot of trouble. Because of these substances, there is a very high requirement for the tightness of the pipe. As long as the pipe itself, or where it is connected, any cracks appear. This is all about making transportation and it doesn't make any sense. Because of the transportation, in the process of transportation, all leaked. 　　This problem, after the rise of seamless steel pipes, slowly disappeared. Because the biggest ace product of our factory is seamless steel pipe. Seamless steel pipe is the best material for transporting liquid or gas. Pipes that use seamless steel tubes are not only in terms of tightness, they reach a very high standard. And in the usual maintenanc...

　　① Artificial visual inspection: lighting conditions, standards, experience, logos, pipe rotation. 　　② NDT inspection. 　　a. ultrasonic testing UT 　　More sensitive to a variety of materials uniform surface cracks and internal defects in materials. 　　b. electromagnetic induction eddy current testing ET 　　Mainly point (hole shape) defect sensitive. 　　c. Magnetic MT and magnetic flux leakage inspection 　　Magnetic detection for detecting surface and near surface defects in ferromagnetic material. 　　d. electromagnetic ultrasonic testing 　　Does not require a coupling medium, it can be applied to high temperature and high speed, rough dry pipe surface inspection. 　　e. penetrant inspection 　　A fluorescent, colored, testing of steel surface defects.

　　Cold expanded of large diameter straight welded pipe is a use of hydraulic or mechanical means urging the steel pipe from the steel wall along the radially outward dilatation pressure molding process. Mechanical than hydraulic mode, the device is simple and more efficient use of steel in high-precision machining conditions more precise, in the reservoir emptying large diameter pipe joints straight no need to use, now the world's most advanced several large-caliber straight seam steel pipe expanding pipeline processes are adopted, the process is as follows: 　　Mechanical expanding is the use of the split-side diameter-enlarged portion of the expansion segments radially, so that the longitudinal direction of the tube in a stepwise manner, the full length of the tube segments to achieve plastic deformation process. It is divided into five stages 　　1, The initial stage of a full circle. Segments open until all the segments are exposed to the pipe wall, this time in the step lengt...

　　1. The erection of scaffolding must be added a base or foundation, and the foundation of treatment. This project poling brace on the foundation slab directly or old soil, foundation pit bottom add tie bearing. Old soil surface laid foundation pit bottom plate must be smooth and shall not be suspended, placed the base should be pull and pull rod, spacing dimension by the regulation to be fixed after placement. 　　2. Steel pipe scaffolding erection sequence is: put sweeping bar (close to the ground of the ledger, height of 20 cm) and by the root set upright, then to sweep the floor and rod fastening of the small bar and rod or sweep the floor and rod fastening, the first step of ledger (with the vertical pole fastening) - first step putlog - the second step of ledger - adding temporary inclined strut (upper main rail fastening, and the second step in installing two wall behind the bar can be dismantled) - the third step, four main rail and putlog to wall rod with Ann, Ann, put the st...

　　In the production of ERW steel pipe process will encounter many problems, the following will mainly talk about some of the issues given diameter machine analysis. In contrast, the lowest rate fixed problems mill, and the process it is also relatively simple, common sizing mill's production somethin There are several types. 　　1, Sizing scratch scratches primary attack in the horizontal and vertical axis on both sides of the pipe cross-section, multi-formed from flat roll and vertical roll pass of marginal. Especially after pass marginal R rounded sharpened, the following questions are presented once may cause injuries. 　　2, Drill pipe drill pipe doubt is rare, the chance of comparison usually thin-walled tube produced episodes, and this is because of poor primary rigid thin-walled tube, and because the wall is thinner simple roll bite. So assume the following questions will form a drill pipe in the production of the incidents. 　　3, The tubes not round tube-round shape is us...

　　Notes of Seamless Steel Pipe Production Process Equipment Points 　　1. Oiled marking: steel pipe hydrostatic testing machine after passing were oiled to prevent corrosion, and according to user requirements for marking. 　　2. Leveling milling: the flat steel anvil machine so that the original curl, and then through the edge milling machine for two-sided steel milling, so as to meet the requirements of the plate width, plate edge parallelism and groove shape. 　　3. Shear molding: the steel plate production line along the outer edge of the spiral curl into a tube. 　　4. Butt cut: seamless steel pipe market equipment using advanced technology pre double submerged arc welding, internal welding, outside welding. The welded steel pipe using a plasma-foot cut to specification length. 　　5. Visual inspection: by professional and technical personnel to some of the basic parameters to be checked. 　　6. The ultrasonic flaw detection: scrap development of the inner and outer sides of the ...

　　The manufacturing process of thick-walled welded pipe production can be divided into three basic methods: cold drawing, cold rolling and hot rolling. The material of steel pipe is 10#, 20#, 35#, 45# is called ordinary steel pipe, 16Mn is called low alloy steel pipes, and the steel pipes are made of 27SiMn, 12Cr1MoV, 10CrMo910, 15CrMo, 35CrMo and stainless steel pipes, which are collectively referred to as alloy steel pipes. According to the use, it is divided into structural seamless steel pipe, seamless steel pipe for transportation, seamless steel pipe for boiler, high-pressure seamless steel pipe for boiler; high-pressure seamless steel pipe for fertilizer equipment, seamless steel pipe for geological brick exploration, Seam steel pipe, seamless steel pipe for petroleum cracking, seamless steel pipe for ships, cold drawn cold-rolled precision seamless steel pipe, various alloy pipes. 　　The API seamless steel pipe is expressed by the method of outer diameter, wall thickness and ...

　　In corrosive environments, the damage caused by chemical or electrochemical interactions between metals and surrounding media is called corrosion. In corrosive environments, corrosion is also caused when stainless steel is not properly selected. Corrosion has many classification methods: 　　1. According to the nature of the action can be divided into chemical corrosion and electrochemical corrosion. 　　2. According to the form of corrosion, it can be divided into general (all-round, uniform) corrosion. The so-called general corrosion is the distribution of corrosion on the entire stainless steel surface. The so-called local corrosion can be divided into pitting corrosion, crevice corrosion, stress corrosion, corrosion fatigue, selection. Sexual corrosion, erosion corrosion, etc. 　　3. According to the environment and conditions of corrosion, it can be divided into atmospheric corrosion, industrial water corrosion, soil corrosion, acid, alkali, salt corrosion, seawater corrosion, h...

　　1. Carbon (C): The carbon content in the steel increases, the yield point and tensile strength increase, but the plasticity and impact resistance decrease. When the carbon content exceeds 0.23%, the weldability of the steel deteriorates, so it is used for welding. For low-alloy structural steels, the carbon content generally does not exceed 0.20%. High carbon content also reduces the atmospheric corrosion resistance of steel. High carbon steel in the open yard is susceptible to corrosion; in addition, carbon can increase the cold brittleness and age sensitivity of steel. 　　2. Silicon (Si): Silicon is added as a reducing agent and a deoxidizer during the steel making process, so the killed steel contains 0.15-0.30% of silicon. If the silicon content in the steel exceeds 0.50-0.60%, silicon is an alloying element. Silicon can significantly improve the elastic limit of steel, yield point and tensile strength, so it is widely used as spring steel. Adding 1.0-1.2% silicon to the quenche...

　　 (1) Manufacturing methods: 　　General boiler steel pipe use temperature is below 450 °C, China's boiler pipe is mainly made of 10 or 20 carbon steel hot-rolled pipe or cold drawn pipe. 　　High-pressure boiler steel pipes are often used in high temperature and high pressure conditions, and the pipes will be oxidized and corroded under the action of high temperature flue gas and water vapor. Steel pipes are required to have high durability, high corrosion resistance and good structural stability. 　　 (2) Use: 　　General boiler tubes are mainly used to manufacture water-cooled wall pipes, boiling water pipes, superheated steam pipes, superheated steam pipes for locomotive boilers, large and small smoke pipes and arch brick pipes. 　　High-pressure boiler steel pipes are mainly used to manufacture superheater pipes, reheater pipes, air pipes, main steam pipes, etc. of high-pressure and ultra-high pressure boilers. 　　The boiler tubes are divided into general boiler boiler stee...