DN is generally used in galvanized steel pipe, DN is the nominal diameter, nominal diameter (nominal diameter), also known as the average outside diameter (mean outside diameter). Nominal diameter is the piping system of all piping accessories with digital representation of the size of the nominal diameter with the letters "DN" followed immediately by a digital sign. The nominal diameter is a convenient round number for reference purposes and has only a non-strict relationship with the process size. This is due to the metal tube of the tube is very thin, tube outside diameter and tube inside diameter difference, so take the tube outside diameter and tube inside diameter of the average value as a tube diameter designation. DN is the nominal diameter, nominal diameter (or called nominal diameter), is a variety of tubes and piping accessories of the common caliber. The same nominal diameter of the pipe and piping accessories can be connected to each other, with interchangeability. It is not the actual sense of the outer diameter or inner diameter of the pipe, although its value with the inner diameter of the pipe is closer or equal; in order to make the pipe, pipe fittings connected to the size of the unity of the nominal diameter (nominal diameter). Its nominal diameter is not the outer diameter, not the inner diameter, but a nominal size of the inner diameter of an approximate ordinary steel pipe. For example, welded steel pipe thickness can be divided into thin-walled steel pipe, ordinary steel pipe and thickened steel pipe. Each nominal diameter, corresponding to an external diameter, the inner diameter of the value with the thickness of different and different. Nominal diameter can be expressed in mm in metric system or in in imperial system. Pipe accessories are also expressed in terms of nominal diameter, with the same significance as seamed pipe. Shandong Province Liaocheng City Xinhao Materials Co., Ltd. is one of the Ruoxi area steel pipe manufacturers, Baosteel seamless steel pipe factory and Tianjin Seamless Steel Pipe Factory special agents, mainly engaged in seamless steel pipe, seamless steel pipe, alloy steel pipe, large diameter seamless steel pipe, thick-walled seamless steel pipe, spiral pipe, welded pipe, galvanized pipe, geologic drilling pipe, geological drilling pipe and other geologic steel pipe, bearing steel pipe, stainless steel tube and other tubes; the company's spot specifications of the steel pipe The company's steel pipe stock specifications, complete, sufficient supply, the existing inventory of more than 10,000 tons, more than 800 kinds of specifications. The company's office, the warehouse as a whole, easy to pick up, fast settlement, over the years adhere to the "keep promises, quality, profitability, righteousness" business philosophy, and the majority of merchants to establish a strong cooperative relationship, by the majority of customers' approval. The company's maximum benefit to customers, acceptance of promissory notes, loading free of charge, holidays as usual delivery, and for the user on behalf of the transportation, transfer of surplus and shortages, welcome the majority of customers and friends to visit us! Shandong Province Liaocheng City Xinhao Materials Co., Ltd. is also Shandong Province - large-scale steel pipe distribution enterprises, 20 # seamless steel pipe factory main agent operating Baotou Iron and Steel Group, Tianjin Seamless Steel Pipe Factory, Chengdu Thick-walled Seamless Steel Pipe Factory, Baosteel Seamless Steel Pipe Factory, Shandong Seamless Steel Pipe Factory, Smelting Steel Thick-walled Seamless Steel Pipe Factory, Anshan Steel Pipe Factory, Wuxi Seamless Steel Pipe Factory, Anyang Seamless Steel Pipe Factory, Hengyang Seamless Steel Pipe Factory, etc. Manufacturers. The materials are 10#, 20#, 45#, 16Mn, 27SiMn, Cr5Mo, 15CrMo, 12Cr1MoV, 35CrMo, GCr15 Bearing Steel Pipe, DZ40 (37Mn5) Geological Pipe, DZ40 (50Mn) Steel Pipe for Drill Collar Drill Bit, DZ45 (45MnB, 50Mn), DZ50 (40Mn2, 40Mn2Si), DZ55 (40Mn2Mo, 40MnVB) geologic core pipe, R780 (36Mn2V, 42MnMo7) geologic drill pipe, DZ60 (45MnMoB) rope core drill pipe, DZ65 (27MnMoVB) geologic steel pipe, such as seamless steel pipe and seamless alloy pipe, the implementation of the standard for: GB/T8162- 2008, GB/T8163-2008, GB5310-2008, GB3087-2008, GB9948-2006, GB6479-2000, GB/T14976-2002, GB/T14975-2002 and other seamless pipes and 201, 304, 321, 316, 316L, 310S stainless steel pipe etc. Pipes. The company solemnly promises you: to ensure the best quality, the lowest price, the most perfect after-sales service, to thank the new and old customers. This library does not have the specifications of the steel pipe can come to the phone in advance to contact, to ensure the arrival of goods on time.
What does DN50-DN60-DN25-DN40 mean in galvanized steel pipe and welded steel pipeShandong Steel Pipe Enterprises produces 20g high pressure boiler pipe|Seamless Steel Pipe Size Specification Sheet|Round Steel|Steel Model|a3 Steel|Stainless Steel Pipe Prices|Seamless Steel Pipe Theoretical Weight Chart |Linyi Steel Pipe Factory |Steel Prices |Steel Theoretical Weight Chart |
Welded Steel Pipe Theoretical Weight
|Stainless Steel Density|Low Alloy Steel|
Galvanized Steel Pipe Theoretical Weight Table
Mainly used in Changchun Huludao Shenyang Anshan Tieling Dalian Tianjin Suzhou Yangjiang Jiangmen Shaoxing Huzhou Zaozhuang Wuxi Zhengzhou Nanjing Wenzhou Ningbo Jinhua Jiaxing Shenzhen Guangzhou Nantong Changzhou Zhenjiang Taizhou Taizhou Yancheng Tai'an Jining Zaozhuang Yantai Weifang Binzhou Dongying Huhehaote Beijing Shanghai Jinan Hangzhou Zhangzhou Luoyang Chengdu Qingdao Baoding Shijiazhuang Liaocheng Cangzhou Linyi Hengyang Tangshan Baoji and other major machinery manufacturing processing industry, construction, high pressure boiler manufacturing, electric power, coal mining, textile, military and other fields.
DN indicates the nominal diameter of the pipe (nominal diameter). The representation of galvanized steel pipe and welded steel pipe is the same.
DN20 OD is 26.75
DN25 OD is 33.5
DN40 OD is 48.0
DN50 OD is 60.0
DN70 OD is 75.5.
What does steel pipe DN350 PN mean
DN --- nominal through diameter --- unit is mm
PN --- nominal pressure --- unit is Mpa "megapascal"
Such as: DN350 PN1,6 --- means that the bearing pressure is PN1,6 flange DN350, with Φ 351 steel pipe, the pipeline bearing pressure <1,6Mpa
What is the meaning of the DN marking in the carbon steel pipe?DN represents the nominal caliber of the pipeline (or nominal diameter), the diameter of the nominal size of the approximate inner diameter, does not mean that the nominal outer diameter minus two nominal wall thickness of the inner diameter. Such as DN50 nominal outside diameter of 60.3mm, the standard type of steel pipe wall thickness of 3.8mm, thickened type of steel pipe wall thickness of 4.5mm, 60.3-3.8 * 2 = 52.7; 60.3-4.5 * 2 = 51.3, they are not equal to the nominal caliber of 50, just an approximate size.
What is the meaning of GALV in steel pipeFirst, the meaning of GALV in steel pipe
GALV is the abbreviation of English galvanized (galvanized), indicating galvanized steel pipe.
Second, the steel pipe
(a) the concept
The development of steel pipe (Steel pipe) production technology began with the rise of the bicycle manufacturing industry, the development of oil in the early 19th century, the two world wars during the ship, boiler, aircraft manufacturing, the Second World War after the manufacture of coal-fired boilers, the development of the chemical industry and the drilling and transportation of oil and gas, have strongly promoted the development of the steel pipe. Transportation, etc., are strongly driven by the steel pipe industry in the variety, output and quality of development.
Steel pipe is not only used for transportation of fluids and powdery solids, exchange of heat energy, manufacturing machinery parts and containers, it is also a kind of economic steel. With steel pipe manufacturing construction structure net frame, pillar and mechanical support, can reduce the weight, save metal 20 ~ 40%, and can realize the factory mechanization construction. Steel pipe manufacturing highway bridges can not only save steel, simplify construction, and can greatly reduce the area of the protective coating, saving investment and maintenance costs.
(B) classification
1. According to the production method
Steel pipe can be divided into two categories according to the production method: seamless steel pipe and seamed steel pipe, seamed steel pipe is referred to as straight seam steel pipe.
2. According to the material
The steel pipe can be divided into two categories according to the material (i.e. steel type): carbon pipe and alloy pipe, stainless steel pipe, etc.
3.
3. Classification according to connection
Steel pipe can be divided into: light pipe (pipe end without thread) and wire pipe (pipe end with thread) according to pipe end connection.
4. According to the coating characteristics
Steel pipe can be divided into: black pipe (without coating) and coating pipe according to the surface coating characteristics.
5. According to the use
(1) Piping pipe. Such as: water, gas pipe, seamless pipe for steam piping, oil pipeline, oil and gas trunk line pipe. Agricultural irrigation tap with pipe and sprinkler irrigation pipe.
(2) thermal equipment pipe. Such as general boiler with boiling water pipe, superheated steam pipe, locomotive boiler with superheated pipe, large smoke pipe, small smoke pipe, arching brick pipe, and high temperature and high pressure boiler tube.
(3) mechanical industrial pipe. Such as aviation structural tube (round tube, oval tube, flat oval tube), automobile half-axle tube, axle tube, automobile tractor structural tube, tractor oil cooler tube, agricultural machinery with square and rectangular tube, transformer tube, and bearing tube and so on.
(4) Petroleum and geological drilling pipe. Such as: oil drilling pipe, oil drill pipe (square drill pipe and hexagonal drill pipe), drill pipe, oil pipe, oil casing and a variety of pipe joints, geological drilling pipe (core pipe, casing, active drill pipe, drill pipe, according to the hoop and pin joints, etc.).
(5) Chemical industry pipe. Such as: oil cracking pipe, chemical equipment heat exchanger and piping pipe, stainless steel acid pipe, fertilizer high-pressure pipe and pipe for transporting chemical media.
(6) Other sectors of the pipe. Such as: container tubes (high-pressure cylinder tubes and general container tubes), instrumentation tubes, watch case tubes, injection needles and their medical equipment tubes.
7. According to the shape of the cross-section
Steel pipe can be divided into: round steel pipe and shaped steel pipe according to the shape of the cross-section.
What is the meaning of the gross tube in the steel pipe
Generally refers to seamless steel pipe, after piercing without other process.
Tubular (tubular billet)
Energy-saving lamp manufacturing process can be roughly divided into three steps: 1 tube molding, 2 tube processing into a tube, 3 tube and circuit board and lamp head assembly into a whole lamp. So the capillary is the tube has been molded tube coated with powder, loaded filament, sealed the mouth of the lamp. As long as it is energized, it will light up. The common shape of the U-type, spiral type two, and other lotus type, pagoda type, ring type, H-type and so on.
What is the meaning of DN50 in steel pipe DN50 represents the nominal diameter; corresponding to the outer diameter of the steel pipe 57mm (small outer diameter) or 60mm (large outer diameter). What is the meaning of 50A marking in the steel pipeIf the steel pipe is for water and gas transportation, it will be used as a steel pipe for water and gas transportation. Gas transmission steel pipe, it is expressed: nominal caliber is the inner diameter. The unit is millimeter or inch. [For example, φ25 water pipe. It means that the nominal caliber (inner diameter) is φ25mm (or an inch) of steel pipe].
If it is a seamless steel pipe, welded steel pipe, it is expressed: the nominal caliber is the outer diameter (outer diameter × wall thickness). The unit is millimeter. [For example, φ32 × 3 seamless steel pipe. It means that the nominal caliber (outer diameter) is φ 32mm, wall thickness of 3mm seamless steel pipe].
What is the value after DN in steel pipeThe value after DN in steel pipe indicates the nominal size of the bore diameter in millimeters.