Hot galvanized square pipe, also known as welded pipe, is a steel pipe rolled from steel plate or strip. The production process of welded steel pipe is simple, the production efficiency is high, the variety and specification are many, and the equipment investment is small, but the general strength is lower than that of seamless steel pipe. Since the 1930s, with the rapid development of the rolling production of excellent hot-dip galvanized square tubes and the progress of welding inspection technology, the welding quality has been continuously improved, the variety and specification of welded steel tubes have been increasing, and seamless steel tubes have been replaced in more and more fields.
Welded steel pipe is divided into straight welded pipe and spiral welded pipe according to the weld form. Straight welded pipe has simple production process, high production efficiency, low cost and rapid development. The strength of spiral welded pipe is generally higher than that of straight welded pipe. Welded pipes with larger pipe diameters can be produced with narrow billets, and welded pipes with different pipe diameters can also be produced with billets with the same width. However, compared with the straight seam pipe with the same length, the weld length increases by 30~100%, and the production speed is lower. Therefore, the small-diameter welded pipe mostly adopts straight seam welding, and the large-diameter welded pipe mostly adopts spiral welding.
The hot-dip galvanized square pipe for low-pressure fluid transmission is also known as ordinary welded pipe, commonly known as black pipe. It is a kind of welded steel pipe, which is used for conveying general low-pressure fluid and other purposes, such as water, gas, oil and heating steam. The wall thickness of steel pipe is divided into ordinary steel pipe and thickened steel pipe; Nozzle ends are divided into unthreaded steel pipes and unthreaded steel pipes. The steel pipe specification is expressed by the nominal diameter, which is the approximate value of the inner diameter. Traditionally, it is usually expressed in inches, such as 11/2. In addition to being directly used to transport fluids, welded steel pipes for low pressure fluid transport are also widely used as raw pipes for galvanized welded steel pipes for low pressure fluid transport.
The uniform deformation of the hot-dip galvanized Jinan square tube is the simple deformation of the object, which is characterized by the fact that the plane and narrative line are still plane and straight after deformation. After deformation, the parallel line remains parallel to the parallel plane, and the cube is perpendicular to the direction of the strain principal axis. After uniform deformation, there is only linear rule change, no shear deformation. If the deformable body is spherical, it will be ellipsoid after deformation.
It can be seen that the characteristic of uniform deformation is that the displacement of each point of the object is a linear function of the original coordinates, and there are only three main strains in uniform deformation, without shear strain.
Hot dip galvanized square pipe in metal pressure processing theory. Especially the pipe rolling theory. Logarithmic strain is widely used to represent uniform deformation. The logarithmic strain is more accurate than the performance of the relative deformation system in representing the deformation degree of the object. Come to our website for more relevant content Ask!