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Stainless steel is called high-alloy steel.They contain about 4-30% chromium.According to its crystal structure, it can be divided into martensite steel, austenite steel and ferrite steel. Class 317 stainless steel is an improved version of 316 stainless steel.High strength and corrosion resistance.The data sheet below gives more details about class 317 stainless steel. Name: austenitic stainless steel Standard: AISI, ASTM Model: 317 UNS number: s31700 Forging No.: ASTM a276 s31700 Casting No.: ame sa351 cg8m Characteristics and application of 317 steel: The pitting corrosion resistance of 317 (18cr-12ni-3.5mo) stainless steel is better than that of 316 steel. 317 stainless steel is used for printing and dyeing equipment materials. HB hardness: 170 (85) Application temperature range on valves: – 325 to 1500 ° f (- 198 to 816 ° C) Chemical composition of 317 steel: 1 C: ≤ 0.08 Mn: ≤ 2.00 Si: ≤ 1.00 Cr: 18.0 ~ 20.0 Ni: 11.0 ~ 15.0 P: ≤ 0.045 S: ≤ 0.03 Mo: 3.0 ~ 4.0 Nitrogen n: ≤ 0.10 Note: ① the single value is the highest value unless otherwise indicated; ② when used in some pipe making processes, the nickel content of some types of austenitic stainless steel must be slightly higher than the value shown in the table; ③ optional; ④ the maximum TA content is 0.10%; ⑤ the maximum content is 0.75%; and ⑥ the maximum content is 0.70%

Deep in Xinjiang’s Tarim Basin, natural gas is mined, refined and transported across the country through gas pipelines.However, due to the corrosion of the pipeline, gas leakage occurs frequently.A new natural gas pipeline made of 2205 dual phase stainless steel containing molybdenum is expected to reduce natural gas leakage and protect resources while avoiding environmental disasters.4500 tons is the largest single order for duplex stainless steel in China so far.Cangzhou wilson pipeline  sales@wilsonpipeline.com What is natural gas? Natural gas refers to all natural gas existing in nature, including gases formed by various natural processes in the atmosphere, hydrosphere and lithosphere (including oilfield gas, gas field gas, mud volcano gas, coal bed methane and biogenic gas, etc.). “Natural gas” is defined in a narrow sense from an energy perspective as a mixture of hydrocarbon and non-hydrocarbon gases naturally present in the formation.In petroleum geology, it usually refers to oil and gas fields.It consists mainly of hydrocarbons and contains non-hydrocarbon gases. Some of the earliest uses of natural gas date back to 500 BC, when the Chinese used hollow bamboo poles to deliver it to stoves and then boiled seawater to make salt.Today, China is trying to reduce carbon emissions and wean itself off coal, so its natural gas industry continues to grow.The Tarim Basin is one of China’s largest natural gas reserves, with more than 200 trillion cubic feet estimated underground. Drilling for natural gas in the vast Gobi desert The Tarim Basin is located in China’s westernmost province and is sparsely populated.In the vast Gobi desert and inhospitable desert, the production and transportation of natural gas is a feat.Due to the strong winds, sand, no roads, and poor working conditions, drilling, and especially piping, is extremely difficult, time-consuming, and expensive. Natural gas is transported from oil and gas wells to nearby refineries for processing.The balance between gas inputs and refinery capacity is critical to maximizing production efficiency.As a result, construction has begun on a new pipeline to connect the two refineries.Upon completion, the refinery will be able to direct the inflow of natural gas to optimize capacity utilization. Finally, refined natural gas from the Tarim Basin enters the west-East gas pipeline and is transported to all parts of the country for use. The new pipeline is located in the orange region of the Tarim Basin in Xinjiang, China. Prevent gas leakage Environmental conditions in the Tarim Basin bring many challenges to pipeline operation.The vast Taklamakan desert has a dry climate.It’s hot in summer and cold in winter.Strong winds often form huge sandstorms, making working conditions extremely harsh.The soil in this area is highly corrosive and contains a great deal of soluble salt, which is left over from years of evaporation.In addition, natural gas is high in carbon dioxide and contains up to 10% chloride, which also increases its corrosion.In such cases, only materials with high corrosion resistance can provide a permanent solution. Pipelines carrying highly corrosive crude oil and natural gas are usually made of composite steel tubes lined with a thin layer of 316 stainless steel.The pipes are resistant to corrosive gases and the initial cost is less than that of the whole stainless steel pipe.However, it is much more difficult to weld composite steel tubes in the field than in a factory-controlled environment.The inner stainless steel weld will be diluted by carbon steel, reducing its corrosion resistance.It is found that the weld corrosion of composite pipeline is one of the causes of frequent natural gas leakage in Tarim Basin. The consequences of a gas leak are environmental damage, lost revenue and, in the worst case, an explosion that must be repaired as soon as possible.However, finding and repairing leaks in this remote desert is a difficult, time-consuming and even dangerous task.As a result, gas companies are seeking more durable pipeline materials for new pipelines to prevent leaks in the first place. Durable solutions Cangzhou wilson pipeline  sales@wilsonpipeline.com  is more and more widely used in China.Material selection is based not only on the initial installation cost, but also on the cumulative cost of future maintenance and operation.Over time, duplex stainless steel piping can recoup its costs by avoiding natural gas losses and reducing maintenance and replacement costs. The “pipeline dragon” in Xinjiang not only optimizes natural gas production in the western region, but also becomes a pioneer in realizing sustainable energy utilization.The investment in the 2205 duplex stainless steel pipeline marks a shift from low cost to a more sustainable and durable solution. Cangzhou wilson pipeline  sales@wilsonpipeline.com

Spiral welded steel pipe is made with the steel strip or steel plate bending deformation shapes like round, square etc. before welding, jointed on the surface of the steel pipe. There are different welding ways: electric arc welding, high frequency or low frequency electric resistance welding, gas welding, butt weld etc. According to the weld shape, welded pipe can be divided into straight seam welded pipe and spiral welded pipe. Electric welded steel pipe is used in oil drilling and machinery manufacturing etc. Butt welded pipe is mainly used as water gas pipe etc. Large diameter straight seam welded pipe is applied in high pressure oil and gas transmission; Spiral welding pipe is mainly applied in oil and gas transportation, pipe pile and pier. Welded steel pipe is lower cost and higher production efficiency than seamless steel tube.Cangzhou wilson pipeline  sales@wilsonpipeline.com Spiral welding pipe has simple production technology, high production efficiency, low cost and rapid development. The strength of spiral welded steel pipe is usually higher than straight seam welded pipe. But compared with straight seam pipe with the same length, the weld seam will increase 30%-100% and the production speed is low. So a small diameter welded pipe adopts straight seam welding, large diameter welded pipe mostly uses spiral welding. The common material: Q235A，Q23b,0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb. Q345, L245, L290, X42, X46, X70, X80 etc. As a professional spiral welded pipe manufacturers, Anson Steel provides high quality spiral welded pipe for our customers and purchaser. Welcome to send inquiry to us! Email: info@octgpipes.com Specifications: Generally specifications include standard brand, nominal diameter, nominal weight of the steel bar (quality), the specified length and the index of the tolerance values etc. And the rebar exported from China scale range is 6～12m. Appearance quality 1. Surface quality: The end should be cut flat straight, surface don’t has crack, scarring and folding and without use harmful defects etc. Cangzhou wilson pipeline  sales@wilsonpipeline.com

the most commonly used carbon steel pipe types in industry today, and they’re very similar.But the most important thing is to distinguish the differences between them.Cangzhou wilson pipeline  sales@wilsonpipeline.com 1.Scope ASTM A53 is Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless. ASTM A106 is Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service. We could see from the above the A53 is for both welded and seamless pipe but A106 for seamless type only. 2.Application A 53 can be welded seam or seamless depending on how it is specificed for purchase. It is a general steel pipe spec and covers galvanized pipe as well as black pipe. A106 is a similar pipe in chemical composition but is intened for high temperature service (up to 750 Degs F). 3.Chemical properties There are different grades under ASTM A53 and A106.We take the most often used Grade B as example: Firstly,A106-B contains silicon, min. 0.10% where A53-B has zero%, and silicon is the important element for improving the heat resistance criteria. Secondly,A106-B contains manganese 0.29-1.06%, where A53-B 1.2%. Thirdly,A106-B contains low sulfur and phosphorus, max. 0.035% where A53-B contains 0.05 and 0.045% respectively. Cangzhou wilson pipeline  sales@wilsonpipeline.com

Sand blasting and shot blasting are both mechanical surface cleaning processes and are often confused.Let’s see what’s the difference between and blasting and shot blasting?The main difference between them is that they have different working principles and applications. Cangzhou wilson pipeline  sales@wilsonpipeline.com Sand blasting takes compressed air as its power and shots the high speed abrasive sand stream to the surface of work piece. Due to the impact and cutting action of abrasive sand, the workpiece surface is completely clean, while the surface quality and mechanical properties are greatly improved.The processed workpiece has better fatigue resistance and adhesion, which helps the coating to be smooth, and the service life is longer. is to use the centrifugal force of the high speed turntable to throw the steel shot to the workpiece surface.After processing, the workpiece will produce finishing effect, pressure stress, improve the fatigue strength.Compared with sand blasting, sand blasting does not produce silica dust and causes less environmental pollution. Sand blasting is the main function of surface rust, remove oxide, such as parts after heat treatment, and shot blasting action and function is more.Not only rust, surface oxide, but also improve the surface roughness, remove machining burrs, eliminate the internal stress of parts, reduce the deformation of parts after heat treatment, improve the surface wear resistance, compression capacity, etc. The decision on which blasting technique to use depends entirely on the materials used in your equipment.Because shot blasting systems blast sand at a higher rate, shot blasting clean systems are usually best for metal surfaces that are more difficult to clean.For example,shot blasting can easily remove rust from a metal surface or peel off paint.Sandblasting, on the other hand, is often used to make finer materials, such as plastics, aluminum, wood, stone, glass, or machinery with sensitive electronic components. Cangzhou wilson pipeline  sales@wilsonpipeline.com

Nondestructive testing is widely used in the field of industry. The technology does not destroy parts or materials, can be detected on site directly with high efficiency. At present, the most common non-destructive testing there are five kinds: UT (Ultrasonic Testing) RT (Radiographic Testing) MT (Magnetic Particle Testing) PT (Penetrant Testing) ET (Eddy Current Testing) UT (Ultrasonic Testing) In a certain speed and direction,this mechanical wave can transmit in the material. And it will produce reflection when it encounters a heterogeneous interface with different acoustic impedance. Heterogeneous interface could be a defect or a bottom surface of the object being measured. This reflective phenomenon can be used for ultrasonic flaw detection. RT (Radiographic Testing) This is the most basic and prevalent NDT method. 1 X-ray characteristic: X-ray is a photon. Its electromagnetic wave are short, the wavelength of 10~10cm. 2.The principle of X-ray image formation is: the difference between the characteristics of X-ray and the density and thickness of the parts. MT (Magnetic Particle Testing) Magnetic particle detection can only detect the surface of ferromagnetic materials or near-surface defects. Because the magnetic traces are accumulated on the detected surface, so can visually display the discontinuous shape, position and size. It also can determine the general attribute. The sensitivity of magnetic particle detection can reach 0.1μm by the discontinuous width. With multiple magnetization methods, the size and geometrical shape of workpiece nearly can not effect the magnetic particle detection. What’s more, it can detect defects in all directions of the workpiece. It suits the Nondestructive testing for Stainless Steel Fittings especially. PT (Penetrate Testing) The basic working principle of Penetration detection: Capillary action of liquid. Luminescence phenomenon of solid dyes under certain conditions. Therefore, Penetration detection is to check if there is coated dye penetrates the surface of the workpiece. If there is a defect, the traces of the penetrate will appear under a certain light source. It detects the appearance and distribution of defects. ET (Eddy Current Testing) Place coil with alternating current on the metal plate or pipe. At the same time, an alternating magnetic field is generated in and around the coil. Then the specimen produced a vortex-like induction alternating current, known as Eddy Current.

Carbon steel plate usually been considered as the steel that does not contain much alloy steel elements. Generally elements are C, Mn, P, S, Si, besides these there are no minimum limits for elements of Al, Cr, Ni, Mo, V etc. Cangzhou wilson pipeline  sales@wilsonpipeline.com Carbon steel plates are available in different grades depending on the carbon content and strength. There are low, medium, and high carbon steel plates. The more carbon content, the more durable and stronger the plate becomes. There are further sub-categories depending on thickness and usage as well as the formation process. Usually carbon steel plates vary from 0.4 mm to 80 mm in thickness and 1000 mm to 45000 mm width, and they can be of length up to 18 meters. But the length is customizable which helps the customers to put them into various applications. One can also make cold rolled steel coils from them. Carbon content levels for each of carbon steel plate Low carbon steel plate: For carbon content 0.06% to 0.25%, also we call it mild steel plate. Medium carbon steel plate: C content from 0.25% to 0.55%. High carbon steel plate: 0.55% to 1.0%, also called hard steel plate. As the content of Carbon increase, the steel plate hardness increases. What are the different types of carbon steel plates available? Carbon steel plates have versatile applications in different industries. It is classified according to the carbon content from low to high. It is also classified according to their usage and application. Different types of carbon steel plates are used in machinery and production companies as the base material for component construction. Its durable property makes it ideal for various manufacturing parts. Apart from carbon steel plate, there are vessel steel plate, shipbuilding or construction steel plate, structural steel plate, pipeline and stainless steel plate. Below there are different types of carbon steel plates and their usage. Carbon Structural Steel Plate It is mostly used in construction industry and hence, the quality, durability, and performance have to be of highest standard. They have to withstand overweight load and pressure and must be corrosion resistant. It is known by the name construction steel plate. Boiler Steel Plate These are high-pressure plates generally used in designing vessels, boilers, and heat containers. Carbon boiler steel plates have low corrosive property and can withstand low heat. Several layers of either chromium or nickel are added to make it suitable for usage in various environments. Tanks Steel Plate These plates are used for building of oil and gas tanks, storage tanks, water tanks, and tanks for storage other all kinds of stuffs. Carbon Shipbuilding Steel Plate Shipbuilding Steel Plate – These plates are in high demand especially from oil and gas industry as they require thick plates of extremely good quality. Most of these are made according to the specifications of the customers and the steel used is certified because a small lamellar tear can be fatal. What standards referred to carbon steel plate? Carbon steel plate almost include all the common standards of steel plate/sheet. ASTM A36 plates – The most common standards of carbon steel plate ASTM A283 Grade A, B, C – Also most common material in carbon structural. ASTM A516 – For boiler, vessel steel plate. ASTM A537 – For heat treated carbon steel plate in fusion welded pressure vessels and structural steel plates. ASTM A573 – A kind of structural steel plate with carbon-manganese-silicon. ASTM A572 – ASTM A572 plate mechanical strength is higher than A36. Where with lower weight. ASTM A737 – For boiler, pressure vessels steel plate of low alloy steel. and etc.. So carbon steel plates have a widely coverage for different types of steel plates in different industries. Cangzhou wilson pipeline  sales@wilsonpipeline.com

316L stainless steel pipe is a commonly used stainless steel pipe. Because of its excellent corrosion resistance, it is widely used in the chemical industry.Cangzhou wilson pipeline  sales@wilsonpipeline.com Its raw material 316L is a kind of stainless steel containing a chemical component – molybdenum. Due to the addition of molybdenum in the steel, the overall performance of 316 L stainless steel pipe is better than that of other common stainless steel pipes, like 304 and 316 pipe. The chemical composition of 316L stainless steel tube is shown below:CSiMnSPCrNiMoContent≤0.030≤1.00≤2.00≤0.030≤0.04516.00～18.0010.00～14.002.00～3.00 Compared with other common steel pipes, 316L stainless steel pipes have superior overall performance, mainly in the following two aspects: Excellent corrosion resistance: The corrosion resistance of 316L stainless steel pipe is better than commonly used 304 stainless steel pipe and 316L stainless steel pipe. In particular, it has excellent resistance to chloride erosion, which can be maintained in the Marine environment. Excellent heat resistance: 316L stainless steel pipes provide excellent heat resistance and oxidation resistance when used in continuous high temperature environments. Cangzhou wilson pipeline  sales@wilsonpipeline.com

Seamless steel pipes are everywhere in our life. Cangzhou wilson pipeline  sales@wilsonpipeline.com  The manufacturing process of seamless steel tube begins with solid round billet. Then the billet is heated to high temperature, stretched and stretched until the hollow tube is hollow. Recently, I have a German customer asking me for the quotation of seamless steel pipes, seamless steel pipes are used in engineering. So, seamless steel pipes are so widely used, let’s take a look at the advantages of seamless steel pipe. What are the advantages of seamless steel tube in application? 1.Hot rolled seamless steel tube can destroy the casting structure of ingot, refine the grain of steel and eliminate the defects of microstructure, so that the microstructure of steel is compact and the mechanical properties are improved.This improvement is mainly reflected in the rolling direction, so that the steel is no longer isotropic to some extent;The bubbles, cracks and loosening formed during pouring can also be welded under the action of high temperature and pressure. .The greatest advantage of seamless steel tube is to increase the ability to withstand pressure. The weakest part of the welded pipe is the weld. However, the seamless steel pipe has no welds and joints, which makes the whole pipeline have the same strength. Cangzhou wilson pipeline  sales@wilsonpipeline.com

A customer needs hot rolled steel pipe this week, but only cold rolled steel pipe due to the special wall thickness.Today let’s learn about the difference between hot rolled steel pipe and cold drawn steel pipe. Cangzhou wilson pipeline  sales@wilsonpipeline.com Cold drawn steel pipe: Cold drawn steel pipe is a steel pipe with no seam on the surface of the whole steel pipe produced by drawing, extrusion and perforation.It is a round, square or rectangular steel with a hollow cross section and no seams around the edges.It is made of steel ingot or solid tube billet by perforation into capillary, and then made by cold dialing. Cold drawn steel pipe is used for mechanical structure, hydraulic equipment, high dimensional accuracy and good surface finish precision cold drawn seamless pipe.Selection of precision seamless tube manufacturing mechanical structure or hydraulic equipment, can greatly save mechanical processing hours, improve the utilization rate of materials, and is conducive to improving the quality of products. Hot rolling is relative to cold rolling, which is rolled below the recrystallization temperature, while hot rolling is rolled above the recrystallization temperature. Difference between hot rolled steel pipe and cold drawn steel pipe: 1: In the production of cold rolled pipe, its section can have a certain degree of bending, bending is conducive to the bearing capacity of cold rolled pipe.However, in the production of hot rolled pipe, its section is not allowed to have local bending phenomenon, which will affect its service life. 2: Due to the difference in the production process between the cold rolled pipe and the hot rolled pipe, their dimensional accuracy and surface finish are also different.In general, the cold rolled pipe is more accurate than the hot rolled pipe, and the surface finish is much better. 3: The production process of cold rolled pipe is different from that of hot rolled pipe.In the process of making and forming cold rolled pipe, the writer’s process, heating treatment, perforation technology, hot rolling technology, head treatment, pickling engineering, phosphating treatment, cold drawing process, annealing treatment, straightening treatment, pipe cutting process, inspection of finished products and packaging treatment are required.On the other hand, hot-rolled pipes need to be wrapped, heated, perforated, rolled, sizing, cold-bed, straightening, switching, as well as final inspection and packaging.From these introductions we can see that there are certain differences in their technological procedures. 4: The section distribution of cold rolled pipe and hot rolled pipe is also different, because the reasons for the residual stress are different in the process of forming.This results in some bending of the residual stress in the section of the cold rolled pipe, whereas the residual stress in the hot rolled pipe is of the thin film type. 5: Because the production process of hot rolled pipe and cold rolled pipe is different, the hot rolled pipe sold on the market is divided into hot rolled seamless steel pipe and hot rolled welded steel pipe;And the cold rolled pipe can be divided into cold rolled seamless steel pipe and cold rolled welded steel pipe, cold rolled seamless steel pipe can be divided into round pipe and special-shaped pipe these two kinds. Cangzhou wilson pipeline  sales@wilsonpipeline.com

The elbow is made of cast iron, stainless steel, alloy steel, malleable iron, carbon steel, non-ferrous metal and plastic. Elbow connection methods are: direct welding (the most commonly used way) flange connection, hot melt connection, electric fusion connection, threaded connection, socket connection.Cangzhou wilson pipeline  sales@wilsonpipeline.com Carbon steel elbows are divided into 45 ° and 90 ° according to the angle, and other special-shaped elbows such as 60 ° are also included according to the needs of the project. It is a metal pipe fitting that changes the direction of the pipe on the carbon steel pipe. Do you know why can’t carbon steel elbow contact water? Carbon dioxide is a kind of impurity in water, which exists in free form under normal conditions. When the pH value is low, many bicarbonates in water also exist in the form of free carbon dioxide, so the problem of average carbon dioxide will appear. If carbon dioxide enters the desalinated water, the conductivity of the water will be added and the corrosivity will be added. Therefore, measures should be taken to prevent CO2 from dissolving into the water tank. For example, the use of nitrogen or other inert gas to protect the top space of the water tank can prevent CO2 from polluting the purified water. Therefore, the more carbon dioxide in water, the more H + generated, the lower the pH value of water, acid corrosion water, damage the protective film formed on the surface of carbon steel, leading to carbon steel corrosion. Cangzhou wilson pipeline  sales@wilsonpipeline.com

The porosity of welding seam will not only affect the compactness of welding seam, cause pipeline leakage, but also become the inducing point of pipeline corrosion, and will reduce the strength and toughness of welding seam seriously. Cangzhou wilson pipeline  sales@wilsonpipeline.com The main factors that affect the porosity of the weld are: the moisture, dirt, oxide scale and scrap iron in the flux, the welding composition and covering thickness, the surface quality of the steel plate and the treatment of the steel plate edge plate, the welding process and the steel pipe forming process, etc. Corresponding prevention and control measures are as follows: 1.Flux composition.When the welding material should contain an appropriate amount of CaF2 and SiO2, the reaction will take place to absorb a large amount of H2 and generate HF with high stability and insoluble in liquid metal, which can prevent the formation of hydrogen pores. 2.The bulk thickness of the flux is generally 25-45mm. When the flux granularity is large and the density is small, the bulk thickness shall be the maximum, otherwise the minimum value shall be taken;Packing thickness of large current and low welding speed shall be maximum, otherwise minimum.In addition, in summer or when the air humidity is high, the recovered flux should be dried before use. 3.Steel plate surface treatment.In order to avoid uncoiling and leveling the detached oxide iron sheet and other sundries entering the forming process, the panel cleaning device should be set up. 4.Steel plate edge processing.Rust and burr removal devices should be installed at the edges of steel plates to reduce the possibility of pores. 5.Weld appearance.When the forming coefficient of the weld is too small, the shape of the weld is narrow and deep, and the gas and inclusions are not easy to surface, and it is easy to form pores and slag inclusion.Therefore, the general weld forming coefficient should be controlled at 1.3-1.5, with the maximum value for thick-wall welded pipe and the minimum value for thin-wall welded pipe. 6.Reduce secondary magnetic field.In order to reduce the influence of magnetic bias blowing, the welding cable on the workpiece should be connected as far away from the welding terminal as possible to avoid the secondary magnetic field generated on the workpiece by part of the welding cable. 7.Production technology.The welding speed should be appropriately reduced or the current should be increased to delay the crystallization rate of the weld pool metal so as to facilitate the gas escape.At the same time, if the strip delivery position is not stable, it should be adjusted in time to prevent the formation of the front or rear axle by frequent fine-tuning, which will cause difficulties in gas escape. Cangzhou wilson pipeline  sales@wilsonpipeline.com