steel pipe

　　 LSAW steel pipe after heat treatment is a new technology to eliminate residual stress. After the material is preheated before welding to heat treatment temperature and the butt welding process to maintain the temperature of the continuously heated member, after the welding is completed using its thermal insulation cotton allowed to cool slowly. This method can effectively reduce the welding residual stress and improve resistance to stress corrosion of metals. 　　Internal weld NDT since the large steel pipes in water supply project belongs, especially the thickness t = 30mm steel is used as a pipe bridge, both to withstand water pressure inside, but also the burden of its own weight and the water formed by a steel pipe moment, so the welding quality requirements are particularly high. For pipe bridge with a thickness t = 30mm large-diameter pipe, the longitudinal seam and girth weld belong to a class, require 100% of X-ray film examination and 100% ultrasonic flaw detection; and th...

　　Precision steel tubes is a kind of seamless steel pipe . 　　Precision tubes features: 　　1. The cold-rolled precision steel tolerances and high precision, product precision control ± 5mm, outer wall finish, the surface oxide layer. 　　2. The cold-rolled precision steel comprehensive performance excellent, able to withstand high pressure, cold bending, flaring, flattening no crack, no wrinkled skin, can do a variety of complex deformation and mechanical processing. 　　3. The promotion and application of precision seamless steel can save and improve processing effectiveness, reduce the manufacturing processes and equipment investment, can save costs and greatly reduce machining time, improve production and material utilization, and help to improve product quality, reduce cost. 　　Precision tubes uses: precision cold-rolled steel is widely used in automobiles, motorcycles, electric cars, petrochemical, power, shipbuilding, aerospace, areas of bearings, pneumatic components, the low...

　　Heat treatment process of lsaw steel pipe 　　First, reasonable selection. Straight pipe joints should choose a good micro deformable material straight seam steel pipe steel, for carbide segregation serious straight seam steel casting steel should be reasonable and transfer of heat treatment, larger and unable to cast a straight seam steel pipe steel may be solution bis refined heat treatment. Reasonable choice of heating temperature control heating rate, on a straight seam steel pipe can be heated slowly, preheat and other ways to reduce heating balanced straight seam steel pipe heat deformation. 　　Second, the correct heat treatment process operation and reasonable heat treatment process is also a useful way to reduce the distortion of straight pipe joints. Straight seam steel pipe deformation reason is often messy, but we only need to master the rules of the deformation analysis of the onset of the reason, the choice of avoiding abnormal deformation method of straight pipe joints...

　　Due to the high hardenability and strengthening the role of alloying elements, some high strength martensitic stainless steel , high speed tool steel and high-strength alloy steel. Often in the quench (or tempering) after a high-temperature tempering, the steel carbide appropriate aggregation obtain coarse carbide particles tempered sorbite organization (with ball annealing similar organizations) Thus, this delivery steel state has good cutting performance cooling directly after delivery, known as hot rolling or forging state, after hot rolling or forging steel and not subject to special heat treatment. Hot rolling (forging) termination temperature is generally 800-900 ℃, after the general natural cooling in the air, and thus hot rolling (forging) state corresponds to normalizing. Unlike strict normalizing heating temperature control, the difference because of hot-rolled (forging) termination temperature high and low. Thus it is well done microstructure and properties of the steel sh...

　　Talking about industrial pipeline, some clients would say that it is seamless steel pipe. Of course we have it for industrial pipeline. However, we should choose it according different work situation of the industrial pipeline. 　　With different work situation, there are two main categories for industrial pipeline. They are process pipelines and power pipelines. 　　Generally speaking, flow pipeline means the pipeline transporting the main material of the product, which is also called material pipe. 　　And for power pipeline, I think we’ve heard it so much. They are steam pipe, air pressure pipe, nitrogen pipe and so on. Power lines affect the normal operation of production. 　　For different physical and chemical characters of the products we need to convey, we should choose the relative pipe for it. 　　 http://www.xysteelpipe.com/info/What-kind-of-steel-pipe-is-used-in-industrial-pipelines-1148-1.htm

　　Difference between Stainless Steel Welded Pipe and ASTM A53 Pipe. 　　1. composition: stainless steel welded pipe is made of nickel chromium steel, carbon steel and iron, and has nickel, chromium, manganese, copper and other elements. The ASTM A53 pipe, also known as the ASTM A53 pipeline, is used for mechanical and pressure applications, and also for general purposes of steam, water, gas and air pipelines. 　　2. corrosion resistance: the stainless steel tube has a good corrosion resistance because it contains two elements of chromium and nickel, and the two elements react with oxygen in the air to form an oxide film, thus protecting the pipe from corrosion. The ASTM A53 tube is very rusty. 　　3. use: the stainless steel pipe can be processed on the surface, such as the mirror, the light surface, the drawing surface, etc., so the stainless steel tube is generally used for the decoration pipe, the supporting tube, the product tube, and the industry can be used in industry, but ASTM ...

　　Implementation GB standards for seamless steel pipe 　　[1] Seamless pipe for structural use (GB/T8162-2008) is a seamless steel pipe for general structure and mechanical structure. 　　[2] Seamless steel pipe for fluid transportation (GB/T8163-2008) is a general seamless steel pipe used to transport fluids such as water, oil, and gas. 　　[3] Seamless steel tubes for low and medium pressure boilers (GB3087-2008) are high-quality carbon structural steels used in the manufacture of superheated steam pipes for various structural low and medium pressure boilers, boiling water pipes, and overheated steam pipes and arched bricks for locomotive boilers. Hot rolled and cold drawn (rolled) seamless steel tubes. 　　[4] Seamless steel tubes for high pressure boilers (GB5310-2008) are high-quality carbon steel, alloy steel and stainless heat-resistant seamless steel tubes for the heating surface of water-tube boilers used to produce high pressure and higher pressures. 　　[5] High-pressure sea...

　　1, Corrosion-resistant. Polyethylene is an inert material, except for a few strong oxidant, can withstand a variety of chemical media erosion. 　　2, Without leak. Polyethylene pipes mainly welded connection (hot melt connection or fused connection), ensure that the interface material, structure and management body's own identity in essence, to achieve the integration of joint and pipe. Test confirmed that the tensile strength and burst strength of the interface was higher than the pipe body, can effectively resist the tensile stress in the pressure generated hoop stress and axial direction. 　　3, High toughness. Polyethylene pipe is a high toughness of the pipe, which is generally more than elongation at break of 500%, based on the pipe's ability to adapt to uneven settlement is very strong. It is an excellent seismic performance of the pipeline. 　　4, With excellent flexibility. Polyethylene flexible polyethylene tube can be coiled, and a longer length of the supply does ...

　　Quality control of lsaw steel pipe before welding is: 　　1) First, make a good quality of raw materials, after passing inspection before being officially entered the construction site, and resolutely put an end to the use of substandard steel. 　　2) Followed by the management of welding materials. Check whether the welding materials for qualified products, storage and baking system whether to perform, whether to issue a weld surface clean and free of rust, electrode coating is intact, with or without mildew. 　　3) Once again, clean weld zone management. Cleaning QA weld zone, without water, oil, rust and dirt oxide film, which is to prevent external weld defects produced an important role. 　　4) Select the appropriate welding method should be implemented first test welding, after welding principles.

　　A106 and A53 are the most commonly used types of carbon steel tubes in industry today. They are very similar. But while the differences between A106 and A53 are few, they matter a great deal in terms of when and where each is specified. 　　To ensure you purchase the correct pipe, two things are a must: A basic understanding of seamless and welded seam pipe, and providing detailed specs. If you read the ASTM and ASME standards for A106 and A53 pipe, you’d quickly observe how similar they are in terms of chemical makeup and manufacture. The most important difference is that pipe meeting the A106 standard must be seamless while pipe meeting A53 can either be seamless or welded. 　　Welded seam pipe is made by curling a steel plate into a cylinder and then joining the edges via a weld. Seamless pipe is made by piercing cylindrical bars of steel through the middle while it’s hot, creating the same shape but without a seam. 　　The reason for the difference lies in the suitable applicatio...

　　SMLS steel pipe is mainly used for petrochemical cracking tube, boiler tube, pipe and automotive bearings, petroleum geology drilling pipe, tractors, aviation and other precision structural tube. 　　Small OD SMLS steel pipe is widely used for both side submerged arc welded manufacturing technology. Small OD SMLS steel pipe’s manufacturing process can be bending, internal welding, commissural, external welding, straightening, flat top multi-channel, etc, to achieve API standards. 　　Large OD with thick wall can be used in all kinds of construction site and make the body supporting portion. For example bridge support, offshore piling, and other building pile.Also, it can also used for liquid transportation. 　　Tips: Carbon steel pipe weight formula is [(OD - WT) * WT] * 0.0246615 = kg / m (weight per meter) 　　 http://www.xysteelpipe.com/info/Application-of-Different-OD-SMLS-Steel-Pipe-1113-1.htm

　　In daily steel procurement, the most irritating and irritating thing is the purchase of inferior seamless steel tubes, which affects product quality. How to identify inferior seamless steel pipe? Here we identify through the following methods: 　　1, poor quality seamless steel pipe surface is prone to scarring. 　　Mainly due to two reasons: 　　(1) There are many impurities in the inferior seamless steel tubes and the materials are not uniform. 　　(2) Inadequate guide equipment for poor quality pipe manufacturers is particularly prone to sticking steel. Contaminated pipes tend to produce scars when they bite into the roll. 　　2, poor quality seamless steel pipe is prone to tube folding. 　　The so-called folding is a variety of fold lines formed on the surface of the seamless steel pipe, and this defect often runs through the entire product. The reason for the folding is that the manufacturer is pursuing high efficiency in order to increase the output. In the production process, ...

　　To understand the seamless steel pipe concrete pump injection solidity and quality of cement concrete and pipe wall, using ultrasonic pulse method of construction quality of the master's Concrete filled Steel Tube Perform nondestructive detection and identification. 　　Ultrasonic testing of seamless steel pipe in concrete work, seamless steel wall along the propagation, the ultrasonic signal to detect whether an impact is detected problems people are concerned, but also whether the ultrasonic pulse was detected by steel concrete quality is the key. As long as the steel inside the concrete is dense, and with the pipe wall concrete cement good, then use when worn detection, the received signal first wave ultrasonic longitudinal wave concrete along the pipe radial transmission, and the time around the pipe wall half the circumference of the spread of the more long, its first break in the first wave after wave superposition, therefore, the quality of ultrasonic testing of steel con...

　　For galvanized steel pipe production lines have special requirements, especially in a production environment this, a good environment can help us better production, improve production quality and production efficiency, particularly galvanized steel that needs a stable environment products even more so. 　　First, Ensure that the production line for delicate work processes, equipment, heating, ventilation, drainage, etc., all work must center around quality galvanized steel to expand, as long as the quality of the galvanized steel to ensure good, all other factors we can be achieved. 　　Galvanized steel currently use is very widespread, especially in natural gas pipes, heating and other high strength and quality of the pipeline industry, galvanized steel pipe has a more obvious than other advantages. Galvanized steel as plumbing, a large amount of rust inner tube after several years of use, the outflow yellow water pollution is not only ware, and mixed with not smooth inner wall of ...