LSAW Steel Pipe

 Project location：TURKEY Product：ERW ,LSAW,STEEL PLATE Standard and material：EN10219 S355JR, EN10025 S355JR Specifications： Steel pipe: 219.1-508mm*5-20mm*6940-12425mm;steel plate: 20-60mm*2m*12000m Application：stadium construction Inquiry time：2023.8.23 Order time：2023.9.6 2023.9.15 Shipping time：2023.10.7 Estimated arrival time：2023.11.15 From receiving customer inquiries on August 23, 2023 to closing orders , it took half a month for us to negotiate and communicate face-to-face with customers, which fully demonstrated the strength of the company and the professionalism and enthusiasm of Xinyue people. For the first time on September 4th, From meeting with the customer to signing the order on September 6th, we negotiated three times in two days, which made the customer feel our persistence and attention. When he also visited the factory and headquarters office, he had a deeper understanding of Xinyue, which strengthened his trust in us. A good foundation has been laid for the ope...

XINYUE STEEL TIANJIN XINYUE INDUSTRIAL AND TRADE CO.,LTD. Since its establishment, focus on international export business development At present, we have two branches in Tianjin and Hunan In the past development process Xinyue provided hundreds of thousands of tons of steel products for all kinds of construction projects around the world Project location: South Africa Product: ERW steel pipe Standard and material:SANS 657-3 2005 Specification: 101.6~177.8MM Usage: drive shaft Timeline: Received inquiry on 7th October, 2021 Signed contract on 20th October, 2021 Delivery time: 17th November, 2021 Arrival time: 15th December, 2021 The customer renewed the order and made a new purchase plan before receiving the goods from the previous order. After two weeks of negotiation, the customer was very satisfied with Xinyue's plan, and the price of Xinyue was within the target price. The customer directly sent the PO and required a third-party final inspection. In order to meet the urgent deli...

Project Location: Europe Product: ERW Steel pipe Specification: EN10219 S235 159*3*1000mm159*3*2000mm159*3*2250mm Usage: Structural steel Inquiry time: 2022.1.10 Order Time:2022.4.15 ETD: 2022.6.5 ETA:2022.7.25 Received an inquiry from a new European customer on January 10, 2022, ERW welded pipe, 159*3mm, EN10219 S235, the pipe needs to be cut into three lengths, the customer informed that this is a pipe they use regularly, and we submit a price plan After that, the customer did not reply quickly. Period through several months of follow-up and updated prices. Finally, in early April, the customer took the initiative to send an email to us to determine the final price and said that the purchase would be determined soon. We re-updated the price and delivery time to the customer. After discussing some details with the customer, the customer confirmed the order the next day. At present, the order has been successfully produced, and the shipment will be arranged after a strict inspection. h...

 　　What is high frequency welding? 　　High-frequency welding is a new type of welding process that uses the skin effect and neighboring effect produced by high-frequency current to connect steel plates and other metal materials. The emergence and maturity of high-frequency welding technology is a key process in the production of ERW steel pipe. The quality of high-frequency welding directly affects the overall strength, quality level and production speed of welded pipe products. 　　The basic principle of high frequency welding: 　　The so-called high frequency refers to the frequency of the alternating current of 50Hz, and generally refers to the high frequency current of 50KHz to 400KHz. When high-frequency current passes through a metal conductor, two peculiar effects are produced: skin effect and proximity effect. High-frequency welding uses these two effects to weld steel pipes. So, what are these two effects? 　　The skin effect means that when an alternating current of a certain fr...

    High frequency straight seam welded pipe (ERW) is the hot rolled coil plate formed by the forming machine, using the skin effect and proximity effect of high frequency current to heat and melt the edge of the tube blank, and pressure welding under the action of the squeeze roller To achieve production. The high-frequency resistance welding method was applied to the production of welded pipes in the 1950s. In the past ten years, its production technology has become more and more perfect, and product quality has been continuously improved. The first is that the quality of raw materials used in ERW production has been significantly improved. Low C, low P, S in the design of steel components, microalloying; converter smelting, ladle refining, vacuum degassing, continuous casting and other new technologies in the smelting process The use of controlled rolling and controlled cooling technology in the rolling process has greatly improved the appearance size, appearance quality, a...

    First of all, the place or warehouse where ERW steel pipes are stored should be selected in a clean and well-drained place, away from factories and mines that produce harmful gases or dust. On the site, weeds and all debris should be removed to keep ERW straight seam steel pipe equipment accessories clean.     Secondly, in the warehouse, it should not be stacked with materials that are corrosive to ERW straight seam steel pipes such as acids, alkalis, salts, cement, etc. Different types of ERW straight seam steel pipes should be stacked separately to prevent confusion and prevent contact corrosion.     In addition, the warehouse should be selected according to geographical conditions.Generally, the general closed warehouse is used, that is, the warehouse has a roof with walls, tight doors and windows, and a ventilation device.     The ERW straight seam steel warehouse requires attention to ventilation in sunny days, and shutting off mois...

　　Cold drawn erw steel pipe, which is one of the best choices for the production of multi-stage hydraulic cylinders. Its process is the same as that of precision seamless pipe cold drawing. It is precision drawn by precision resistance welding (ERW) and manufactured with EN. 10305-2 EU mechanical cold drawn carbon steel welded pipe standard. 　　After the electric resistance welded pipe is welded, the whole pipe body is normalized to ensure the homogeneity of the weld and the heat affected zone with the rest of the metallographic structure and mechanical properties; cold drawing and subsequent heat treatment (eliminating internal stress) and the steel pipe have good dimensions. And mechanical properties. 　　After the welded steel pipe is processed by cold drawing and deep processing, a high-quality steel pipe with small dimensional tolerance and good mechanical properties is obtained. 　　In addition, cold drawn welded pipes have significant advantages over cold drawn seamless pipes i...

　　The difference between ERW straight seam resistance welded steel pipe and LSAW straight seam submerged arc welded (UOE) steel pipe: 　　1. The difference between raw materials and production capacity 　　The raw material of ERW steel pipe is hot rolled steel coil, and the raw material of UOE steel pipe is hot rolled steel plate. Therefore, ERW steel pipe can realize continuous pipeline operation, high production efficiency and low production cost; while UOE steel pipe is processed by steel plate, continuous pipeline operation cannot be realized, production efficiency is low, and production cost is high. 　　The ERW steel pipe is limited by the thickness of the coil. Generally, the maximum thickness that can be produced is 25mm, and the maximum caliber that can be produced is 660mm. The maximum thickness that UOE steel pipe can be produced is 40mm. The maximum production diameter is 1422mm. 　　2. Welding difference 　　No welding wire is required for ERW steel pipes; welding wire is ...

　　High-frequency electric resistance welding (ERW) steel pipe production, internal weld surface treatments are generally incomplete curettage (left weld reinforcement) and complete curettage (scraping will form the inner surface of the groove) in two ways, and the results were not ideal, will affect the overall performance of the steel pipe. Taking into account the thickness of ERW pipe welds, strength and reliability of ultrasonic testing, squeeze through thick welds - calibrating processing, optimized contour shape welds to improve the overall performance of ERW pipe. 　　 ERW steel pipe after welding, excess metal is extruded from the weld area, both inside and outside surfaces of pipe burr formation, commonly known glitches, usually scraper to remove internal and external burrs. In actual production, better quality generally scrape the outer burr, but scraping issues within the burrs are more likely to leave some of the inner surface of the glitches over the formation of a high or...

　　1. Tube blank quality 　　 ERW steel pipe special steel has high purity. Through de-S, de-P, de-aeration, Ca treatment and other methods, the S and P content can be controlled below 0.005%, the N content can be controlled below 0.008%, the shape of the inclusions can be controlled to be spherical and the number can be greatly reduced. The C content is controlled below 0.1%, which has good welding performance, and the increase in strength is to prevent the growth of austenite grains by adding trace alloy elements such as Nb, V, Ti, etc., while increasing the gap strengthening to improve the steel Toughness and strength. The billet of SML steel pipe is generally made of A3, 20 steel, 16Mh and other materials. The purity of the material is poor, and the C content is high, generally about 0.2%, which is not conducive to girth welding during construction, and the strength is acceptable. But toughness is poor. 　　ERW steel tube blanks are manufactured by cold-rolling hot-rolled steel str...

　　ERW straight seam resistance welding steel pipe and straight seam submerged arc welding (UOE) of steel pipe 　　1、 the difference between raw material and production capacity 　　 ERW steel pipe raw material is hot rolled steel coils, UOE pipe raw material is hot rolled steel plate. So the ERW steel tube can realize continuous assembly line work, high production efficiency, production cost is low; And UOE pipe made with steel plate processing, unable to realize continuous assembly line, the production efficiency is low, the production cost is high. 　　ERW steel pipe limited by the thickness of the steel coil, general can produce the biggest thickness is 25 mm, it can produce the biggest diameter is 660 mm; And can produce the maximum thickness of UOE pipe to 40 mm, it can produce the largest diameter is only restricted by steel plate width, now can produce maximum diameter is 1422 mm. 　　2、 the welding 　　ERW steel pipe welding does not need to add solder wire; UOE pipe is added ...

　　Steel pipe has a variety of production processes. High-frequency welding technology is one of them, it usually used by pipe manufacturers to produce ERW steel pipe . Actually, high-frequency welding can be divided into two ways, resistance welding and IWinduction welding. 　　What is resistance welding? 　　The resistance welding is carried out by using a pair of copper electrodes to contact on both sides of the welded steel pipe, induction current penetration is good, the two effects of high frequency current are maximized using since the copper electrode directly contact with the steel plate. The welding efficiency of the resistance welding is high and the power consumption is low, so it is widely used in the production of high speed and low precision pipe. And in the production of special thick steel pipe, it is also necessary to use resistance welding. 　　But there are two shortcomings in resistance welding: first, copper electrode is in touch with steel plate, so it will wear q...

　　Some novices don’t know ERW tubes standards, when they try to buy steel pipe for the first time, they usually feel puzzled. So, there is a brief introduction of Prime’s ERW steel pipes specifications for all of you, including application, specification, standard & grade, end, surface, and packing. 　　The application of ERW steel pipe : 　　For low pressure fluid transmission, such as water pipelines, agriculture & irrigation (water mains, sewerage systems,industrial water lines, ;ant piping, deep tube-wells & casing); 　　For machinery manufacturing, such as engineering purpose, fencing, scaffolding, line pipes etc.; 　　For Gas pipe lines (pipe lines for natural gas), LPG and other non-toxic gas. 　　The specification of ERW steel pipe provided by Prime Steel Pipe: 　　OD (Outside Diameter): 21.3mm ~ 660mm 　　WT (Wall Thickness): 1mm ~ 17.5mm 　　Length: 0.5mtr ~ 22mtr (5.8/6/11.8/12 meters, SRL(Single the length, the nominal length is 40FT, 12m), DRL(Double the length...

　　ERW pipes means Electric Resistance Welded Pipes. ERW steel pipes and tubes are used in various engineering purposes, fencing, scaffolding, line pipes etc. ERW steel pipes and tube are available in various qualities, wall thicknesses, and diameters of the finished pipes. 　　1. Yield strength of the N80 is higher than the J55 up to 173 ~ 206 MPa. 　　2. On the same area of ??the sample, the elongation of N80 is higher than J55. 　　3. Under the same size, the same sample orientation, the same minimum sample size, J55 grade couplings, coupling stock, coupling material, semi-finished and coupling attachment material can absorb lower than N80 steel grade. 　　4. The nondestructive testing methods of seamless pipe,coupling stock, welded tube with J55 and N80 is differeent. 　　5. J55 and N80 steel grade is not the same color: length greater than or equal 1.8m, J55 painted a bright green, N80 painted a red; 　　6. J55 chosen by the manufacturer, or organize according to the order specifi...

　　Different production process would give clients various types of square steel pipe. Today, for this kind of ERW steel pipe , we will have a comparison for the hot rolled and galvanized. 　　Hot rolled square steel tubing: due to its special strength, durability and ability to withstand extreme temperatures, it is usually used for domestic and industrial applications. With the process of welded, formed and drilled, it has a wide range of application for customers. 　　Galvanized square steel tube: it is easy to weld, cut, form and machine. The galvanized coating also allows for improved corrosion resistance over other types of carbon steels. In addition, galvanized tubes are a lower cost alternative to steel to achieve rust free protection for up to 30 years, while maintaining comparable strength with a durable surface coating.

　　Different steel pipe, both seamless pipes and welded tube like ERW steel pipe , will be applied in various situations. There will be different steel pipeline’s standards in the pipe field for multifarious usage. 　　Thus, there are different demands for pipes. It is very important to know what's your application before ou inquiries. Here, we would like to compare three tubes from standard aspect. 　　API 5L: PSL 1and PSL 2 would be the normal type for this category. Whether seamless or welded type, API 5L can meet our demands with international standard requirements. 　　ASTM A53: Another popular steel pipe among engineering project. It contains from pipe, steel, black, hot-dipped and zinc-coated, welded and seamless. Generally speaking, customers will use them among mechanical and pressure applications. 　　EN10219: Used for cold formed welded structural hollow sections of non-alloy and fine grain steels, this type tube is also popular among clients.

　　We are familiar ERW steel pipe due to its wide application all over the world nowadays. Today, our topic would focus on the different standards for this pipeline and its application according to various characters. 　　1. API 5L Line Pipe for oil and gas, and we can provide different categories here. 　　2. ASTM A53 standard specification for steel pipes. ASTM steel tube has multifarious standards and you can ask for detailed information if you are interested in this type. 　　3. Black and Hot-Dipped, Zinc-Coated Welded and Seamless. No matter welded or seamless steel pipe, it is not a big problem once you purchase here in our company. 　　4. EN10217 Welded steel tubes for pressure purposes. Technical delivery conditions. Talking about pressure, low, middle and high pressure transmission tubes, you can have a look here. 　　5. Non-alloy steel tubes with specified room temperature properties. Non-alloy or alloy steel pipeline is also in our production range.

　　As summer approaches, the weather becomes hotter. We bought an air conditioner in our dormitory. When the installer installing the air conditioner, I asked him “What kind of pipe do you use?”. “copper pipe”, he answered. “And what kind of pipe is the water pipe?”, “like ERW steel pipe .” 　　And then I find there are many things are made of metal pipes in our dormitory. Among them, steel pipes uses most. At that night, I think the question “If there is no steel pipe in the world”: 　　I know that in recent years, more and more enterprises at home and abroad have replaced seamless pipe with steel pipe. Because of steel pipe, it greatly reduces our purchasing cost and improves our economic benefit. 　　I know it would be difficult for us to build a building without steel pipes. Steel pipe is widely used in the construction industry. Steel pipe is used in large shopping malls, theaters, airports and bridges and so on. 　　When we drive a car, we need to use steel pipe to discharge car e...

　　If your customer has affection on large diameter steel pipe, no matter ERW steel pipe or LSAW type, you would figure out the advantages for it. Thus, you will finally figure out the special treatment for large diameter steel pipe. 　　In order to achieve the standards like API, we know that large diameter pipe would have strict production process. Thus, it can serve on the engineering project like bridge piling, underwater piling, piling high-rise buildings. 　　With its good adhesion, corrosion resistance, and other traits, we will make large diameter steel tube improve traffic and transportation efficiency, reduce delivery pressure loss. 　　Coating solvent-free is another character, no leaking substances, and thus will not contaminate the transmission medium, thus ensuring fluid purity and hygiene at -40 ℃ to +80 ℃ range can be used alternately hot and cold cycles, aging, no cracks, which can in cold areas such harsh environments.

　　The advantages of this ERW steel pipe processing technology are that there is a heat treatment process after welding to eliminate the residual stress in the weld and heat affected areas, to refine the grain, and to make the heat affected zone of the weld small, and the heating speed is fast, thus greatly improving the welding speed and welding quality, and can be used as a blank without pickling, shot peening and trimming. At the same time, it can weld alloy steel, high alloy steel and non-ferrous metal pipe, greatly reducing unit power consumption. A set of welding equipment can be used to produce each. 　　The advantages of this ERW steel tube processing technology are that there is a heat treatment process after welding to eliminate the residual stress in the weld and heat affected areas, to refine the grain, and to make the heat affected zone of the weld small, and the heating speed is fast, thus greatly improving the welding speed and welding quality, and can be used as a blank...