SSAW Pipe

　　1. Use a suitable tool: When cleaning stainless steel tubing, be careful and use non-abrasive tools. Soft cloth and plastic wipes do not damage the surface of stainless steel decorative square tubes . Of course, you can also use a stainless steel decorative square tube to clean the ball, but it must be wiped according to the manufacturer's sanding mark. 　　2. the cleaning direction of the grinding line: some stainless steel decorative square tube surface has a grinding line or "texture". If there is sand light, it must be wiped in the same direction as the sand light. If the texture is not clear, be careful and wipe with a soft cloth or plastic pad. 　　3. Alkaline, chlor-alkali or non-bleaching detergents: Many conventional detergents contain bleach, and the industry now offers more bleach-free detergents. If they tell you that the detergent used contains bleach, ask them if they have other options. They may have a bleach-free detergent to choose from. Of course, avoi...

　　According to the ANSI B36.10 america standard 　　 Seamless steel pipe wt grade: Sch10, Sch20, Sch30, Sch40, Sch60, Sch80, Sch100, Sch120, Sch140, Sch160 ten grades; 　　1) ANSI B36.19 wall thickness grade: Sch5s, Sch10s, Sch40s, Sch80s (usually used for stainless steel) four grades; 　　2) According to the wall thickness of steel pipe, China, ISO, and Japan 　　3) The thickness of the pipe wall is expressed by the weight of the pipe, which divides the wall thickness of the pipe into three types: 　　a. Standard weight tube, expressed in STD 　　b. Thickened tube, expressed in XS 　　c. Extra thick tube, denoted by XXS. 　　For example: 　　For pipes with DN ≤ 250mn, Sch40 is equivalent to STD, DN<200mm pipe, Sch80 is equivalent to XS and sch20. These are the corresponding grades. The table can be found in millimeters. For example, DN200 sch20 wall thickness. The American standard thickness is 6.35 mm.

　　At present, the most common method of pipe cutting by spiral steel pipe manufacturers is that the plasma is cut. When cutting, a large amount of metal vapor, ozone, and nitrogen oxide dust will be generated, which will seriously pollute the surrounding environment. The key to solving the soot problem is how to inject all the plasma dust into the dust removal equipment to prevent air pollution. 　　For plasma cutting of spiral steel pipe, the difficulty of dust removal is: 　　1. When the nozzle of the plasma gun is cut, the air is blown out in two opposite directions at the same time, so that the smoke emerges from both ends of the steel pipe, and the suction port installed in one direction of the steel pipe is difficult to recover the smoke well. 　　2. The cold air around the suction port enters the suction port from the outside of the machine and the air volume is large, so that the total amount of smoke and cold air in the steel pipe is larger than the effective air volume sucked...

　　Steel pipe fittings play an important role in the connection, control, change of direction, streaming components collectively sealed and supporting. Carbon steel pipe fittings are main auxiliary products for the steel pipe. The key products contain carbon steel elbow, flanges, steel cap, steel tee, carbon steel pipe reducer. The standards include national standard, American standard and DIN. 　　Carbon steel pipe fittings are also called pressure pipe fittings. It is usually divided into three types: butt class pipe fittings, socket welded pipe fittings and threaded pipe fittings. In pipe joints system, you need various sizes of steel pipe fittings due to the different pipe sizes. For instance, you have to connect to a straight tube or tube section, the threaded pipe fitting is necessary. After the deep process of finished steel pipe, any pipe should belong to the scope of the steel pipe fittings, because it has double characteristics of the tubes and mechanical elements. 　　The si...

　　Hot-dip galvanized tube summer storage precautions and return to alkali treatment: 　　Due to the hot-dip galvanized square tube, a layer of condensed water adhering to the surface of the hot-dip galvanized angle steel galvanized layer is treated with oxygen, carbon dioxide, hydrogen sulfide, sulfur dioxide, oxide, soot particles, dust, etc., and other chemical gases. , becomes a corrosive aqueous solution attached to the surface of the zinc layer to form an electrolyte, and the electrolyte is electrochemically corroded with a chemically unstable zinc layer, thereby producing a powder. Uncorrupted corrosion product ---- "white rust". 　　Hot-dip galvanized square tubes, hot-dip galvanized angle steel to prevent the production of "white rust" are: 　　1. When stacking, there shall be no condensed water on the surface of the galvanized steel pipe and there is still heat present; 　　2. Air circulation should be maintained in the warehouse, and the moisture content ...

　　The seamless steel pipe is made of ordinary and high-quality carbon structural steel (Q215-A to Q275-A and 10 to 50 steel), low alloy steel (09MnV, 16Mn, etc.), alloy steel, stainless acid and acid resistant steel. 　　 Seamless steel tubes have hollow sections and are used in large quantities as pipes for transporting fluids, such as pipes for transporting petroleum, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, the steel pipe has a lighter weight when it has the same bending and torsional strength, and is an economical section steel. The material of the seamless steel pipe is different and its use is different.

　　Main production process description of large diameter straight seam welded pipe: 　　1. Stencil: After the steel plate used to manufacture the large-diameter submerged arc welded straight seam steel pipe enters the production line, the whole board ultrasonic inspection is first carried out; 　　2. Milling edge: double-sided milling the two edges of the steel plate by the edge milling machine to achieve the required plate width, parallelism of the edge of the plate and the shape of the groove; 　　3. Pre-bending: pre-bending the edge of the board with a pre-bending machine to make the edge of the board have the required curvature; 　　4. Molding: On the JCO molding machine, half of the pre-bent steel plate is first stepped and pressed into a "J" shape, and the other half of the steel plate is also bent and pressed into a "C" shape, and finally an opening is formed. "O" shape 　　5. Pre-welding: the jointed straight seam welded steel pipe is welded and con...

　　 Steel Pipe Age Hardening 　　What is age hardening? Age hardening is happened when melting at high temperatures in iron and a small amount of nitrogen and carbon. With the time spending, age hardening is precipitated gradually from the pure iron. The formaton of free carbides and nitrides. The plastic deformation of the matrix from the containment, so that the strength of steel increased plastic. Therefore, the steel products toughness, plastic, strength decreased. This phenomenon becomes age hardening, commonly know as aging. 　　Age hardening process is generally very long, but if the plastic deformation after heating, the aging hardening can develop very fast. This method called artificial aging. In duplex stainless steel, the α-phase region shrinks with decreasing temperature. Quenching retained α phase, by low temperature γ precipitation for the provision of age-hardening possibilities. The gamma-precipitate is a hardening component. This phenomenon allows the alloy to have a ...

　 　Advantages of welded pipe 　　Structural welded pipe (tubing) can be used for a wide variety of mechanical applications. It may be used either statically or dynamically. Its close tolerances, good finish, and dense structure make it ideal for parts such as structural support and parts, frames, racks, trailer beds and trailer components, structural components and supports for buildings, bridges, and highways, conveyors, machine parts, ornamental usages and a wide range of applications in industrial, construction, automotive, appliance and agricultural industries. 　　Welded pipes are generally more cost effective than the equivalent seamless alternative. They are significantly more available both from distributor and mill stocks and from a mill production lead time perspective. With longer lead times seamless tubes can be exposed to unknown alloying price extras that can fluctuate substantially, hence it can be difficult to plan and predict the true costs for the material. Therefore ...

　　The advantages of rectangular steel tube 　　Steel tube is used as a structural element in buildings, bridges and other structures, and in a wide variety of manufactured products. It's produced in round, square and rectangular shapes in a broad range of sizes and gauges. RECTANGULAR TUBE has many benefits: aesthetic appeal, high strength-to-weight ratios, uniform strength, cost effectiveness and recyclability. 　　The advantages for designers, specifies, fabricators and end users are outlined on the 　　1. RECTANGULAR TUBING has greater strength-to-weight ratios. So, with RECTANGULAR TUBE you need less steel, by weight, to do the job. And less weight equals less cost 　　2. Excellent compression and support characteristics and superior resistance make RECTANGULAR TUBES particularly well suited to all types of column applications 　　3. RECTANGULAR STEEL TUBE is made from steel, one of the world’s most recyclable and recycled materials 　　4. Torsional strength makes STEEL RECTANG...

　　3PE anti-corrosion steel pipe base material includes seamless steel pipe , spiral steel pipe and straight seam steel pipe. The three-layer polyethylene (3PE) anti-corrosion coating has been widely used in the petroleum pipeline industry for its good corrosion resistance, water vapor permeability and mechanical properties. 3PE anti-corrosion steel pipe An anti-corrosion layer is very important for the life of buried pipelines. Some pipes of the same material are buried in the ground for decades without corrosion, and leaks occur in some years. It is because they use different outer coatings. 　　Steel pipe outer wall anti-corrosion form 　　3PE anti-corrosion generally consists of three layers of structure: 　　A layer of epoxy powder (FBE>100um) 　　Two-layer adhesive (AD) 170～250um 　　Three layers of polyethylene (PE) 1.8 ~ 3.7mm 　　In the actual operation, the three materials are mixed and integrated, and processed to make it firmly combined with the steel pipe to form an exce...

　　For heating pipes with low and medium pressure boilers (working pressure is generally not more than 5.88Mpa, working temperature is below 450°C); used in high pressure boilers (working pressure is generally above 9.8Mpa, working temperature is between 450°C and 650°C) Heating surface pipe, economizer, superheater, reheater, petrochemical industrial pipe, etc. 　 　Specifications and appearance quality 　　(1) GB3087-2008 "Smooth Steel Pipe for Low and Medium Pressure Boilers". Various types of structural steel pipes for boilers, with an outer diameter of 10 to 426 mm, totaling 43 types. There are 29 kinds of wall thicknesses of 1.5 to 26 mm. However, the outer diameter and wall thickness of superheated steam pipes, large smoke pipes, small smoke pipes and arch brick pipes for locomotive boilers are otherwise specified. 　　(2) GB5310-2008 "Seamless Steel Tube for High Pressure Boiler" The high pressure boiler tube of the hot rolled tube has an outer diameter of 22...