the classification of a pipe

 First, the classification of a pipe, according to the production method of classification (1) mm hot-rolled seamless tubes, cold rolled tubes, cold drawn tube, squeeze tube, top tube (2) pipe (a) by sub-mm arc welding process tube, resistance welding pipes (high-frequency, low frequency), gas pipe, stove pipe (b) by sub-mm Longitudinal seam, spiral welded pipe 2, the shape classification by cross-section (1) simple circular cross-section steel tube mm , square tube, oval tube, triangle tube, hexagon steel, diamond steel, octagonal steel, semi-circular steel round, other (2) the complexity of equilateral hexagonal cross-section steel tube mm, five plum-shaped steel, double-convex shaped steel tube, double concave steel, melon-shaped steel tube, conical steel pipe, corrugated steel pipe, steel case, the other 3, according to classified mm thin-walled steel pipe wall thickness, thick-walled tube 4, by Type mm pipes with steel pipes, hot Engineering equipment with steel pipes, industrial steel machinery, petroleum, geological drilling steel, container steel, chemical industry with steel pipes, special-purpose steel, the other two, is a kind of seamless steel hollow sections, no seams around the steel bar . steel hollow sections with a large number of channels for transporting fluids, such as the transportation of oil, natural gas, gas, water and some solid materials, pipes and so on. steel pipe and solid steel bar, etc. compared to the same torsional strength in bending , lighter, is an economic cross-section steel, widely used in the manufacture structural parts and mechanical parts, such as drill pipe, automotive transmission, bicycle frame and steel building construction using scaffolding. with a steel pipe ring parts can be improve material utilization, simplify manufacturing process, saving material and machining time, such as bearing rings, jack sets, has been widely used to make steel. steel or a variety of indispensable material of conventional weapons, gun barrels and so on should steel to manufacture. pipe shape by cross-sectional area can be divided into tube and shaped tubes. As the perimeter of equal conditions, the maximum area of a circle with a circular pipe can carry more fluid. In addition, the ring section to withstand internal or external radial pressure, force more evenly, so the vast majority of pipe is pipe. However, there are some limitations tube, such as by plane bending conditions, the tube is not as good side , rectangular tube bending strength, some farm machinery frame, steel and wood furniture to common square and rectangular pipes. According to different purposes need to have other shaped cross-section shape steel. 1. Structural Seamless Steel Tube (GB/T8162-1999 ) is used for general structural and mechanical structure of the seamless steel tubes. 2. fluid delivery with seamless steel pipe (GB/T8163-1999) is used for conveying water, oil, gas and other fluids generally seamless. 3. Low Medium pressure boiler seamless pipe (GB3087-1999) is used to manufacture various structural low and medium pressure boiler superheated steam pipes, boiling water pipes and superheated steam locomotive boiler pipes, opium pipe, a small brick arch pipe and high-quality carbon tubes Prime hot-rolled and cold drawn steel (rolled) seamless steel tubes. 4. high-pressure boiler seamless pipe (GB5310-1995) and above are used to manufacture high pressure water tube boiler heating surface with high-quality carbon steel, heat-resistant alloy steel and stainless steel seamless pipe. 5. fertilizer equipment with high pressure seamless steel pipe (GB6479-86) is applicable to operating temperature - 40 ~ 400 ℃, working pressure of 10 ~ 30Ma of chemical equipment and piping quality carbon structural steel and alloy steel seamless steel tubes. 6. petroleum cracking (GB9948-88) is applicable to the oil refinery furnace tubes, heat exchangers and pipe seamless steel tubes. 7. Geological Drilling Pipe (YB235-70) is the core drilling for geological department of the steel used by applications can be divided into the drill pipe, drill collars, cores, sleeves and precipitation tubes. 8. diamond core drilling seamless pipe (GB3423- 82) is used for diamond core drilling drill, core rods, seamless steel casing. 9. oil drilling pipe (YB528-65) is used for oil drilling within the thickening or external upset ends of seamless steel pipe . steel points and non-threading threading two types of connector coupling threading works, no threading methods and tools useful butt joint connection. 10. ship carbon steel seamless pipe (GB5213-85) is to create the ship I level pressure piping, Ⅱ grade pressure piping, boilers and Superheater carbon steel seamless steel tubes. carbon steel seamless pipe wall temperature does not exceed 450 ℃, alloy steel seamless pipe wall temperature over 450 ℃. 11. automobile axle casing seamless pipe (GB3088-82) is the manufacture of automobile axle casing and drive shaft axle housing of high quality carbon steel pipes and alloy steel hot-rolled seamless steel tubes. 12. Diesel high pressure tubing (GB3093-86) is to create high-pressure diesel injection system works in the cold drawn seamless steel tubes. 13. hydraulic and pneumatic cylinder diameter seamless steel tubes with precision (GB8713-88) is a manufacturing hydraulic and pneumatic cylinder with Precision bore sizes drawn or rolled precision seamless steel tubes. 14. drawn or cold rolled precision seamless steel pipe (GB3639-83) is used for mechanical structure, hydraulic equipment, high dimensional accuracy and surface finish of a good drawing or cold-rolled precision seamless steel tubes. use of precision seamless steel tube manufacturing equipment, mechanical structures or hydraulic, mechanical processing save hours of work can greatly improve material utilization, and help to improve product quality. 15. structure with stainless steel seamless pipe (GB / T14975-1994) is widely used in chemical, petroleum, textile, medical, food, machinery and other industrial corrosion resistant pipes and structural parts and components made of stainless steel hot-rolled (extrusion, expansion) and cold drawn (rolled) No pipe joints. 16. fluid transport stainless steel seamless pipe (GB/T14976-1994) is used for the transmission fluid made of stainless steel, hot rolled (extrusion, expansion) and cold drawn (rolled) seamless steel tubes. 17. Shaped No seam steel pipe is in addition to other than the cross section of seamless steel tubes in general. by steel cross-section can be divided into different shapes and sizes shaped seamless steel pipe wall thickness, etc. (code-named D), ranging from shaped seamless steel pipe wall thickness (code-named BD), variable diameter shaped seamless steel pipe (code-named BJ). shaped seamless steel tubes are widely used in various structural parts, tools and mechanical parts. and the tube compared to generally larger Yixingguan moment of inertia and section modulus, torsional bending greater ability to significantly reduce the structural weight, saving steel. Third, also known as welded steel pipe welded steel pipe, steel plate or strip is formed after the welding is made by curling steel pipe. welded steel pipe production process is simple, high efficiency, variety specifications, equipment, less capital, but the general strength of less than seamless .20 century, 30 years, along with high-quality steel rolling production and the rapid development of welding and inspection technology, continuously improving the quality of the weld, welded steel pipes of different specifications increasing and more and more areas instead of seamless steel tubes. welded steel pipe into the form by Longitudinal seam and spiral welded pipe . Longitudinal production process is simple, high efficiency, low cost, faster development. Spiral Welded Longitudinal generally higher than the high intensity, can narrow the larger diameter pipe billet production, but also with the same width of the billet production of different pipe diameters. but with the same length of straight pipe joints compared weld length of 30 to 100%, and lower production rate. Therefore, the smaller diameter pipe actually use straight seam welding, large diameter spiral welded pipe for the most part. 1. low pressure liquid delivery welded steel pipe (GB/T3092-1993), also known as general welded pipe, commonly known as the clarinet. is used for conveying water, gas, air, oil and low pressure steam heating and other general fluid and welded steel pipes for other purposes. steel pipe and then divided into general thickening of the wall thickness steel tube; take over the side into the form of non-steel tubes (fluorescent tubes) and with a steel pipe. pipe with the specifications Nominal Diameter (mm) that the nominal diameter is the diameter of the approximation. customarily used expressed in inches, such as 11 / 2 and so on. low pressure liquid delivery welded steel pipe for the transmission fluid in addition to direct, but also a large number of zinc used as a low pressure liquid delivery welded steel pipe of the original tube. 2. low pressure liquid delivery galvanized welded steel pipe (GB/T3091-1993), also known as galvanized welded steel pipe, commonly known as white tube. is used for conveying water, gas, oil and heating the air steam, warm water and other general purpose low pressure fluid, or other hot-dip galvanized welded (furnace brazed or welded) steel tubes. pipe wall thickness then divided into ordinary galvanized steel and thicker galvanized steel pipe; take over the side into the form of non-threaded galvanized galvanized steel pipe and threaded.'s specifications with nominal pipe diameter (mm) that the nominal diameter is the diameter of the approximation. customarily used expressed in inches, such as 11 / 2 and so on. 3. ordinary carbon steel wire pipe (GB3640- 88) is the industrial and civil construction, installation of machinery and equipment and other electrical installation works for the protection of steel wire. four. straight seam welded steel pipe (YB242-63) is parallel to the longitudinal weld steel pipe and steel pipe. is usually divided into metric welded steel pipe , welded tube, transformer cooling pipes and so on. 5. pressurized fluid transport spiral submerged arc welded pipe (SY5036-83) for the tube is hot-rolled steel strip coils, often warm spiral shape, with double-sided submerged arc welding welding method for the pressure fluid transfer spiral steel pipe. strong pressure pipe welding performance, through a variety of rigorous scientific examination and testing, safety and reliability. steel caliber, transmission efficiency, and conservation laying of pipeline investments. mainly used to transport oil and gas pipelines. 6. pressurized fluid transport high-frequency spiral welded steel pipe (SY5038-83) is a hot-rolled steel strip coils for the tube, often warm spiral shape, using high lap welding method of welding frequency, pressure fluid transfer for high-frequency spiral welded steel pipe. steel strong pressure, good plasticity, easy welding and machining molding; through a variety of strict and scientific examination and testing, safety and reliability , large diameter steel pipe, transmission efficiency, and save the laying of pipeline investments. is mainly used for laying of transmission oil and natural gas pipeline. 7. generally low pressure liquid delivery spiral submerged arc welded pipe (SY5037-83) is hot rolled steel coil as a tube, often warm spiral shape, using double-sided automatic submerged arc welding or welding into the legal system for water, gas, air and steam low pressure liquid delivery SAW pipe. 8. generally low transmission fluid with high-frequency spiral welded pipe (SY5039-83) is a hot-rolled steel strip coils for the tube, often warm spiral shape, lap welding method using high frequency welding for general low pressure liquid delivery frequency spiral welded steel pipe . 9. pile with spiral welded steel pipe (SY5040-83) is a hot-rolled steel strip coils for the tube, often warm spiral shape, using double-sided submerged arc welding or high frequency welded, for civil engineering structures, the terminal , bridges and other infrastructure pile diameter pipe with a steel flange pipe elbow pipe manufacturing power base