Seamless Steel Pipe

 Alloy seamless pipe is a pearlite heat-resistant alloy structural steel, which has good high-temperature mechanical properties, high plasticity during cold deformation, no tempering brittleness tendency, good machinability and acceptable weldability. It is generally used under high-temperature normalizing and high-temperature tempering; It is mainly used for superheater tubes with working temperature of 570 ~ 585 ℃ in pressure boiler, pipeline accessories with medium temperature ≤ 570 ℃ (flange, flange cover, etc.), and forgings for other purposes (such as flat hole cover and thermometer socket). Before making coating (oil or copper plating, etc.) on the surface of alloy steel pipe, it is necessary to remove the oxide scale and defect layer on the surface, avoid stress concentration and reduce its service strength. At present, the commonly used treatment methods include cleaning, tool derusting, acid pickling and shot blasting, and shot blasting is an ideal treatment method for pi...

　　The main applications of alloy steel pipes is power station, nuclear power plant, high pressure boiler, high temperature superheater and re-heater coil etc. of high temperature pipeline and equipments. 　　The advantages of alloy steel pipes: 100% recycled, it is suitable for the national strategy of environmental protection, energy-saving and resource-saving. Therefore, the national policy encourages the expansion of the high pressure alloy steel pipe applications. At present, the proportion of the total alloy steel tube is half of the developed countries. The applications of alloy steel pipe provide a broad space for the industry development. According to the research of the China association of special steel alloy pipe expert group, our country’s high pressure alloy steel pipe material demand grows by an average of up to 10-12%. 　　How do I choose which alloy steel to use? Selecting the right alloy for a specific application is vitally important in order to achieve a sustainable...

　　Steel pipe fitting are made of carbon or alloy steel pipe , plates, profiles, to a certain shape that could make a function (Change the fluids direction or rate) in pipeline systems. Mostly these fittings includes steel elbow (45 or 90 degree bend), tee, reducer (concentric or eccentric reducer), cross, caps, nipple, flanges, gasket, studs and etc. 　　For industrial purposes, in pipeline systems usually we need to change the transmission direction; Adjust fluids (oil and gas, water, slurry) flow rate; Open or close the pipelines, etc. So to complete these activities, steel pipe fittings will be applied. 　　The manufacturing processes for pipe fittings includes forging and shaping operations. As well as pressing, hammering, piercing, extruding, upsetting, rolling, bending, fusion welding and machining. Or the processes of combination of two or more of these operations. 　　During the manufacturing steel pipe fittings, below activities shall be noted: 　　1, Injurious imperfections, ...

　　Even for ASTM steel pipe, it is only one main category. However, we can divided seamless steel pipe or other pipes into lots of detailed categories according to the different material’s component. Here is our explanation for it. 　　Alloy ASTM steel pipe: 　　ASTM A333 alloy steel seamless pipe: ASTM A333 Gr.1 Gr.3 Gr.6 alloy steel pipe is for low temperature services. 　　ASTM A335 alloy steel seamless pipe: ASTM A335 alloy steel seamless pipe for high-temperature services. 　　ASTM A209 alloy steel seamless pipe: ASTM A209 Seamless Carbon-Molybdenum Alloy Steel Boiler and Superheater Pipe. 　　ASTM A213 alloy steel seamless pipe: ASTM A213 Alloy Steel Boiler, Superheater, and Heat-Exchanger Pipe. 　　ASTM A199 alloy steel seamless pipe: ASTM A199 seamless cold-drawn intermediate alloy-steel heat-exchanger and condenser tube. 　　 Carbon ASTM steel pipe: 　　ASTM A178 ERW tube: ASTM A178 electric-resistance-welded carbon steel and carbon-manganese steel boiler and superheater tube. ...

　　ASTM A335 P11 is part of ASTM A335, and the pipe should be suitable for bending, flanging and similar forming operations, and suitable for welding. 　　The steel should meet the requirements of chemical composition, tensile properties and hardness. Water pressure test should be carried out in every pipe. In addition, each pipe should be inspected according to the required practice by NDT. 　　Mechanical test requirements for different pipelines, such as lateral or longitudinal tensile tests, flattening tests and hardness or bending tests, are presented. 　　The ends of each box will indicate order number, heat number, size, weight and binding or as required. 　　Outer Dimensions: 19.05mm – 114.3mm 　　Wall Thickness: 2.0mm – 14 mm 　　Length: max 16000mm 　　Steel grade: ASTM A335 P11 　 　Packing: 　　Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested. 　　 Inspection and Test: 　　Ch...

　　Alloy steel pipe is a kind of seamless steel tube, its performance is much higher than that of general seamless steel tube, because this kind of steel tube contains Cr, high temperature resistance, low temperature resistance, corrosion resistance and other non-pipe joint performance mismatch, so the more extensive use of alloy tube in the petroleum, aerospace, chemical, electric power, boiler, military, and other industries. 　　The main use of alloy steel pipe used in power plants, nuclear power, high-pressure boiler, high temperature superheater and re-heater high pressure and high temperature piping and equipment, it is made ??of high quality carbon steel, alloy structural steel and heat-resistant stainless steel material, hot-rolled (extrusion, expansion) or cold-rolled (pull) made? 　　The biggest advantages of alloy steel pipe 　　Can be 100% recycled, environmentally friendly, energy-saving, resource conservation, national strategy, national policy to encourage the expansion o...