LSAW Steel Pipe

    How could we forget the sulfate galvanized conversion when we talked about the process characters of galvanized steel pipe. Today, as manufacturer of steel pipes, Tianjin xinyue steel would have a list for sulfate galvanized conversion in hot galvanized steel pipe.     Sulfate galvanized conversion:     Sulfate galvanized ferroalloy retains only the main salt of zinc sulphate zinc sulfate, and the remaining components, such as aluminum sulfate, alum (potassium aluminum sulfate) can be added in the treatment. This would finally lead to the formation of insoluble hydroxide precipitate precipitation. For organic additives, we can add powdered activated carbon adsorption to remove it. Tests showed that aluminum sulfate and potassium aluminum sulfate is difficult to completely remove in once. And this has a certain degree influence for brightness for brightness of the coating, but it is not serious, as it can be taken out of consumption, which make coat...

    Welded pipe, one pipe the surface has the steel pipe joint, is now widely used in conveying water, sewage, gas, air, heating, steam and other low-pressure fluid and other uses. As for ERW steel pipe, it is only one category of welded pipe. So that we can have a view for the categories of Nine category.     ERW steel pipe:A kind of pipe rolled to become a pipe and welded using Electric Resistance Welding process.     (SSAW) Spiral submerged-arc welding steel pipe: its forward direction and forming pipe has reel molding angle (adjustable), side molding edge welding and weld them into a spiral.     (SAW) Submerged arc welding pipe: a common arc welding process.     (HFI) High frequency welded pipe: this is a welding process in which the heat source used to melt the joining surfaces is obtained from high-frequency (HF) alternating current (ac) resistance heating.     (LSAW) Long-Submerge-arc Welded: leaflets plate as ...

    There is phenomenon that we would like to bury the steel pipe, whether seamless steel pipe, ERW steel pipe or SSAW steel pipe, in soil. Why? We would choose to put them on air if necessary. Here are some questions we need to consider.     First of all, pro-long life-span would be one of the reasons. We all know that the metal corroded because you left it out in the rain for too long once we just put them on air. According the information about Seamless Steel pipe, we know the specific chemical composition of it. So it is not difficult to figure out that we should keep them away from the air.     In addition, buried in soil would be good for convenient transportation. We would concede that steel pipe has good character of holding pressure. However, we would like to reduce the holding situation if we can. So buried steel pipe in soil would has the function of cushion for steel pipe.     http://www.xysteelpipe.com/info/Why-do-we-bury-steel-...

    Have you ever wondered how an oil refinery steel pipe like seamless steel pipe or ERW steel pipe works in the cold day or in the deep sea? Here you can learn more details about this technology involved in the whole process.     First of all, we know that refining oil needs skill to separate the crude oil and the refined oil. Thus, the steel pipe, like the seamless steel pipe or ERW steel pipe would have the function of the transportation. Transporting oil would require the steel pipe with high pressure taking character, thus seamless steel pipe and ERW steel pipe would be the top on the lists.     Then, after the refinery, we should figure out that we should store and transport the refinery oil too. So it is necessary to have seamless steel pipe for work too.     Explore the critical role refining plays in unleashing the potential of a barrel of crude oil and turning it into the specially formulated products that we rely on every day. Th...

    It would harass our clients once they wholesale bunches of steel pipe for engineering project. Thus, it is the duty for steel pipe suppliers such as seamless steel pipe, ERW steel pipe as well as SSAW steel pipe.     Taking Seamless Steel Pipe - ASTM A53 from Tianjin Xinyue Steel Group for example, we know that there are testing process of Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc), Exterior Size Inspection for end product.     Among these tests, for Hydrostatic Testing, it is a kind of test for pressures when plain and threaded and coupled pipe are specified. Hydrostatic pressure shall be maintained for not less than 5 seconds for all sizes of seamless and ERW pipe. Of course, for other tests, we should figure out the relevant skills before the testing.     http://...

    (1) Diameter and Wall thickness     JCOE can produce pipe diameter and wall thickness greater than the UOE, which is produced by the two molds and production processes of the decision. For UOE, a set of O machine mold can only produce a diameter of the pipe, and is the second process to complete the molding, pressure on the molding unit demanding, so UOE can produce a smaller diameter and wall thickness range. For JCOE, steel pipe forming is taken by bending machine step forming the bending pressure required to greatly reduce, so the power requirements of the unit greatly reduced. Therefore, in the case of the same unit pressure, JCOE can produce a greater range of wall thickness, and a set of molds can produce a variety of pipe diameter, pipe diameter can produce a greater range. Baosteel O forming machine pressure reached 72000t, is the world's largest pressure O forming one of the production wall thickness can reach 40mm. From the current domestic and intern...

    In the process of high-frequency welding steel pipe, the welding process and the control of process parameters, the placement of the induction coil and the position of the resistor have a great influence on the welding quality of the steel pipe weld.     1) Control of weld gap of steel pipe The steel strip enters into the welded pipe unit, which is formed by the forming roll, after the orientation of the guide roll, the round steel pipe blank with open gap is formed, and the squeezing amount of the squeezing roller is adjusted, ~ 3mm, and to keep the weld ends flush. Weld gap control is too large, will weld the weld caused by poor fusion or cracking; weld gap control is too small, due to excessive heat, resulting in weld burning, melting metal splash, welding quality of the weld . In this case,     2) The position of the induction coil should be placed on the same center line as the steel tube. The distance between the front end of the induction coi...