steel pipe

    Hot dip galvanized steel pipe like zinc one has zinc coating thickness, with a coating uniform, it has strong adhesion, long life and other advantages, this is the reflection when we talked about the galvanized steel pipe. Then why for the zinc coating thickness adding in steel pipe.     Fast deposition rate with excellent protection:     Galvanic current efficiency of galvanized ferroalloy process can reach 100%. And fast deposition rate is unmatched by any galvanizing process. With the fine pipe running speed 8 ~ 12 m / min, the coating thickness of an average of 2m / min, it is difficult for galvanize reached. Bright and beautiful coating look good. According to the national standard GB / T10125 "artificial atmosphere test - salt spray test" method test, 72 h, coating intact, no change; 96 h, a small amount of white rust coating surface.     http://www.xysteelpipe.com/info/Protective-properties-of-galvanized-steel-pipe-910-1.htm

    Hot-rolled seamless steel pipe production is one of the important processes, the rational development of its process plan or not, a direct impact on the size of the steel pipe after rolling the surface of the precision and quality,     Unreasonable process plan will cause the inner surface of the steel pipe to produce the defects such as folding, crack and concave.     N80Q steel casing is a standard oil casing commonly used in oil (for the seamless steel pipe ), the standard provisions of the finished pipe heat treatment process for quenching and tempering.     N80Q casing production process is as follows: furnace refining → continuous casting → annular furnace → perforation → continuous rolling → stepping furnace → sizing → sawing → tempering treatment → straightening → physical and chemical testing → testing → thread processing → Coupling tight → water pressure test → measuring length weighing, marking → packaging storage. The billet ...

    The heat treatment after welding is a new technique to eliminate residual stress. Preheating the material to the post-heat treatment temperature before welding and welding of the workpiece continued to keep the heating temperature, the use of insulation after the completion of the insulation of cotton to its slow cooling. This method can effectively reduce the welding residual stress and improve the stress corrosion resistance of metal.     After welding heat treatment can effectively reduce the welding residual stress, and the higher the heat treatment temperature, the better the residual stress elimination effect. The heat treatment of large diameter lsaw steel pipe can effectively improve the stress corrosion resistance of large diameter steel pipe. The higher the temperature of post-heat treatment, the more remarkable the stress corrosion resistance is. Diffusion method Metal carbide coating technology is the workpiece placed in special media, the prolifer...

    In order to detect the transverse or longitudinal defect of the weld of LSAW longitudinal seam, ultrasonic testing was carried out by jet (water column) coupling. Jet (water column) ultrasonic flaw detection is the probe and the pipe through the jet coupling between the probe issued by the longitudinal wave beam through the water or steel interface into the steel pipe, through the waveform conversion of the steel pipe welds pure shear wave detection.     Therefore, the realization of the weld in the pure shear wave detection, the probe angle of incidence must be between the critical angle and the critical angle between the II, can be derived from the law of refraction. The critical angles of the first and second critical angles of incident longitudinal waves from the water to steel are calculated to be 14.5 °and 27.3 °, respectively.     Longitudinal welded pipe Ultrasonic Inspection: Nondestructive testing is on-site testing, fast and non-destruct...

    Longitudinal welded pipe to control the quality, in order to safely carry out production operations, but also to protect the operator an essential element of personal safety. The main application areas are: large span grid project, building steel structure project, electric power and EHV transmission and distribution project, mechanical engineering, bridge, bridge, railway station, airport, stadium steel structure project, municipal pipe network, Foundation piling, water gas pipeline and highway construction and other supporting facilities.     1, According to the welding process specification review wire and flux specifications are correct, to prevent the wrong use of welding wire and flux caused by welding quality accidents.     2, The welding environment to monitor, when the welding environment is not good (temperature below 0 ℃, relative humidity greater than 90%) should be taken after the appropriate measures for welding.     3, Bef...

    1. Composition: Stainless steel welded pipe is a nickel-chromium steel, carbon and iron elements out, there are nickel, chromium, manganese, copper and other elements. ASTM A53 pipe, also known as ASTM A53 pipe, is intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas and air lines.     2. Corrosion resistance: Stainless steel tube because it contains two elements of chromium and nickel, these two elements and oxygen in the air chemical reaction occurs to form an oxide film, which protect the pipe is not corroded, so the stainless steel tube has a good corrosion resistance. ASTM A53 pipe is very rusty.     3. Uses: Stainless steel tube surface can be a variety of processing, like can be made of mirror, glossy, drawing surface, etc., so stainless steel pipe is generally used for decorative pipe, prop tube, product pipe, industry can be used for industrial, but astm a53 is mainly used in oil an...

    Wishing you all the best would be the first and initial goal when SSAW steel pipe supplier send the products for clients. With the development of technology, there is no doubt that even for SSAW steel pipe, they have changed a lot. Here are some details for it nowadays.     Process would guarantee the basic quality of the end product so that process would be introduced for clients. Usage would tell the clients which situation is best for the steel pipe as well as customer’s living standards. So here are the process and usage introduction:     Process: Spiral Submerged- Arc Welded Steel Pipe     Usage: SSAW steel pipe can be used for low pressure liquid delivery, such as water, gas, and oil; construction and piling.     Standard:API 5L, API 5CT, ASTM A252, ASTM 53, EN10217, EN10219, BS, JIS, IS     Certificate:EN10217, EN10219, API 5L PSL1/ PSL2, API 5CT     Out Diameter:219.1 mm – 2540mm (8"-100") ...

    Steel pipe is not the only pipe. But not all transportation job need steel pipe, I, ERW steel pipe, have to remember that. Under this situation, introducing technology and make development in steel pipe would be an eternal topic for the whole family of steel pipes.     Before I born, I seem to have run in a great circle, and met myself again on the starting line. That's a symbol of the final end product for me. There is decision you have to make before your birth, and every time you make an important choice, the part of you left behind continues the other life you could have had.     For me, ERW steel pipe, I've chosen become the welded pipe so there is an operation for me in my body as there is a scar in there. Of course, this decision gives me the duty for being used for low pressure liquid delivery, such as water, gas, and oil. Oil drilling and machinery manufacturing, etc. too. In addition, wall thickness, out diameter, steel grade and so on are...

    I think it must be a joke as some friends told me that they don’t know how to identify me ERW steel pipe and seamless steel pipe. Today, I ERW steel pipe would like to make a speech here and listen carefully to figure out the difference between our brothers.     First of all, I have to commit that my brother seamless steel pipe has handsome look as there is no scar on his face. However, for me ERW steel pipe, I think I’m ugly as there is a long scar in my face because of naughty in my childhood.     Secondly, I’m a magician if you would like to call me like that. I can change my figure easily than my brothers. Maybe keeping fit is my advantage as I can change my size, weight more easily than seamless steel pipe. Actually, this depends on the production method.     What’s more, ERW pipe short for electric resistance welding, is used in delivery of liquid, such as fuel, gas and so on, regardless the requirement of pressure. It plays an imp...

    No doubt that there is difference between ERW steel pipe and HFW steel pipe. The former is made through low or high frequency resistances Electric Resistance. However, for the latter, it is specially for high-frequency electric resistance welding.     Here is the question: What kind of requirements would be allowed into ERW steel pipe’s process?     There are untold steel pipes with different standards could be produced by ERW process. And for clients, they may just need some common standards in pipelines. So we would like to list them for customers to choose.     Stainless steel ERW pipe/tube standards and specifications     ASTM A269 stainless tube     ASTM A312 Stainless pipe     ASTM A270 sanitary tubing     ASTM A790 ferritic/austenitic/duplex stainless pipe     Carbon steel pipe in ERW     ASTM A53 Grade B and A (and Galvanized)     ASTM A252 pile p...