Changsha Xiangjia Metal Materical Co., Ltd.

 1. The geometric characteristics of the pipe section are good, the pipe wall is thin, the material of the section is distributed around the centroid, the radius of gyration of the section is large, and it has strong torsional rigidity; as a member under compression, bending and bidirectional bending, its bearing force is higher, and the straightness of cold-formed pipe and the accuracy of section size are better than hot-rolled open section. 2. In terms of anti-hydrodynamic characteristics, the cross section of the round tube is good, and the effect of wind and water flow is reduced. The rectangular tube section is similar to other open sections in this respect. 3. The steel pipe is a closed section; when the average thickness and cross-sectional area are the same, the exposed surface area is about 50% to 60% of the open section, which is beneficial to corrosion prevention and can save coating materials. 4. The node connection is suitable for direct welding, without the node plate or

 The following tests are should do before  SSAW steel pipe  leaves the factory: 1. Appearance inspection Appearance inspection is a simple and widely used inspection method. It is an important content of finished product inspection. The main purpose is to find defects on the surface of the welded seam, dimensional deviations and raw material joints.Usually it can be found by eyes and with the help of tools such as template, gauge and magnifying glass. If there are defects on the surface of the weld seam, there may be inside the pipes. The joint should not be more than 1100mm from the pipe end. 2. Physical inspection  Physical inspection methods are methods that use physical phenomena to measure or inspect. For inspection of internal defects of raw materials or workpieces, SSAW steel pipes are subjected to hydraulic testing after forming, and then take non-destructive testing. Non-destructive testing includes ultrasonic testing, radiographic testing, penetrating testing, and magnetic te

 The  elbow  is a connection pipe fitting used to connect pipes and change the direction of the pipe in installation, so that the pipe can be turned at 90°, 45°, 180° and various degrees. Bending radius ≤ 1.5 times of pipe diameter is elbow, bending radius> 1.5 times of pipe diameter is bend. Technical requirements for the produce elbows: It is required to control the radius of curvature. For example, if the radius length is 1.5D, then the radius of curvature must be within the required tolerance range. Since most of these pipe fittings are used for welding, in order to improve the welding quality, the ends are beveled, with a certain angle and a certain side. This requirement is very strict. For the welding requirement, the steel material of the connected pipe should be the same. 1. 1.5 times the center height of the elbow A = diameter * 1.524, which is the diameter D * multiple, and the result will be the number after the decimal point is rounded to the nearest whole number. For e

  Stainless steel welded pipes  are widely used in electric heating pipes, radiators, petrochemicals, and various industrial stainless steel pipe industries due to its excellent performance. According to the different materials, the application are different, including: GB/T3091-1993 (galvanized welded steel pipe for low pressure fluid transportation). Mainly used to transport water, gas, air, oil, heating water or steam and other lower pressure fluids and other purposes. Its representative material is Q235A grade steel. GB/T14291-1992 (Welded steel pipe for mining fluid transportation). Mainly used for LSAW steel pipes for mine pressure, drainage, and shaft gas discharge. Its representative material is Q235A, Grade B steel. GB/T14980-1994 (Large diameter electric welded steel pipe for low pressure fluid transportation). It is mainly used to transport low-pressure fluids such as water, sewage, gas, air, heating steam and other purposes. Its representative material is Q235A grade steel.

  Plastic-coated pipes  also called plastic-coated steel pipes, which are based on steel pipes and use PE for hot dipping or EP as anti-corrosion material. A steel-plastic composite steel pipe with a PE anticorrosive layer or EP anticorrosive layer welded on the inner and outer surfaces of the steel pipe (bottom pipe) by spraying, rolling, dipping, and sucking. Plastic coated steel pipe has excellent corrosion resistance. And it also has good electrical insulation and won't cause electrical corrosion. Low water absorption, high mechanical strength, low friction coefficient. It can also effectively prevent damage to plant roots and soil environmental stress. Advantages of plastic-coated pipe 1. Adapt to buried and humid environments, and can bear high and very low temperatures. 2. Strong anti-interference ability. If plastic coated steel pipe is used as a cable sleeve, it can shield external signal interference. 3. Good pressure strength, the maximum pressure can be 6Mpa. 4. Good in

 1. Since the shortening of the fine casting of  seamless steel pipes  greatly surpasses of cast iron, in order to avoid the shortcomings of shrinkage cavities and shrinkage porosity of seamless steel pipes, risers, chilled iron and subsidies are used in the casting process to complete sequential condensation. In order to avoid shrinkage, shrinkage, porosity, and cracks in seamless steel pipe castings, seamless steel pipes with uniform wall thickness should be made to avoid sharp and right-angle structures. Sawdust is added to the casting sand and coke is added to the core. , And the use of hollow cores and oil sand cores to improve the concession and air permeability of sand molds or cores. 2. Due to the poor fluidity of molten steel, in order to avoid the lack of cold casting of seamless steel pipe castings, the wall thickness of the steel castings should not be less than 8mm; use dry casting or hot casting; appropriate casting temperature, generally 1520°~ 1600°C, due to the high po

Latest Updated Price List for API 5L/ASTM A106 Gr.B Carbon Steel Seamless Pipe Note: Those Price are for bare pipe , based on EXW Price , not including shippment charge, Negotiate with us if large quantity. The most important is those price are valid in one week. If you have any question, plz don't hesitate to contact us: lily@adtooo.com  

Precision steel pipe   is a high-precision steel pipe material processed by cold drawing or hot rolling. Due to the inner and outer walls of precision steel pipes have no oxide layer, high pressure without leakage, high precision, high smoothness, cold bending without deformation, flaring, flattening without cracks, etc., they are mainly used to produce pneumatic or hydraulic components, such as cylinders, could be a seamless tube or a welded tube. The chemical composition of precision steel pipes includes carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, and chromium Cr. Specifications of precision steel pipes 10# 0.07~0.13 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035 20# 0.17~0.23 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035 35# 0.32~0.39 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035 45# 0.42~0.50 0.17~0.37 0.50~0.80 ≤0.035 ≤0.035 40cr 0.37~0.44 0.17~0.37 0.50~0.80 ≤0.035 ≤0.035 0.08~1.10 25Mn 0.22~0.2 0.17~0.37 0.70~1.00 ≤0.035 ≤0.035 ≤0.25 37Mn5 0.30~0.39 0.15~0.30 1.20~1.50 ≤0.015 ≤0.020 Changsha Xiangji

 20# and 20G are the material of  seamless steel pipe . 20G steel pipe uses GB5310 national standard steel grade, and 20# steel pipe uses GBT 699-1999&GBT 3639-2008. The national standard numbers of the two steel pipes are different, and their uses, characteristics, and prices are also different. 1. The difference in usage. 20# seamless steel pipes are structural pipes, fluid pipes, and low and medium pressure boiler pipes. 20G seamless steel pipes are used to manufacture high-pressure and higher-parameter boiler pipe fittings. Both of them contain carbon content, but 20G seamless steel pipes also have some trace elements, which are better for make boiler pressure vessels.  2. The difference in characteristics. The characteristic strength of 20# seamless steel pipe is higher than 15# steel. It is rarely quenched and has no temper brittleness. Cold deformation has high plasticity and able to bending, rolling and hammer arching. The welding performance of arc welding and contact wel

Price List for Carbon Steel Seamless Steel Pipe ，API 5L/ASTM A106 Gr.B Note: Those Price are for  bare pipe , based on  EXW Price , not including  shippment charge . The mose important is those price are valid  in one week . If you have any question, plz donot hesitate to contact us:  lily@adtooo.com

Price List for Carbon Steel LSAW Steel Pipe ，API 5L Gr.B Note: Those Price are for  bare pipe , based on  EXW , not including  shippment charge . The mose important is those price are valid  in one week . If you have any question, plz donot hesitate to contact us:  lily@adtooo.com

 Price List for Carbon Steel SSAW Steel Pipe API 5L/ASTM A53 Gr.B Note: Those Price are for  bare pipe , based on  EXW , not including  shippment charge . The mose important is those price are valid  in one week.  If you have any question, plz donot hesitate to contact us:  lily@adtooo.com

 Price List for API 5L/ASTM A53 GR.B Small Diameter ERW Steel Pipe Note: Those Price are for bare pipe , based on EXW , not including shippment charge . The mose important is those price are valid in one week. If you have any question, plz donot hesitate to contact us: lily@adtooo.com