热镀锌方管，又称焊接管，是由钢板或钢带轧制而成的钢管。焊接钢管生产工艺简单，生产效率高，品种规格多，设备投资少，但一般强度低于无缝钢管。自20世纪30年代以来，随着优良热镀锌方管轧制生产的快速发展和焊接检验技术的进步，焊接质量不断提高，焊接钢管的品种和规格不断增加，无缝钢管在越来越多的领域被取代。

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.

焊接钢管按焊缝形式分为直焊管和螺旋焊管。直焊管生产工艺简单，生产效率高，成本低，发展迅速。螺旋焊管的强度一般高于直焊管。管径较大的焊管可以用较窄的坯料生产，管径不同的焊管也可以用相同宽度的坯料生产。然而，与相同长度的直缝管相比，焊缝长度增加了30~100%，生产速度较低。所以，小直径焊管多采用直缝焊，大直径焊管多采用螺旋焊。

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.

低压流体输送用热镀锌方管又称普通焊管，俗称黑管。它是一种焊接钢管，用于输送一般低压流体和其他用途，如水、气、油和加热蒸汽。钢管壁厚分为普通钢管和加厚钢管;接管端形式分为无螺纹钢管和无螺纹钢管。钢管规格以公称直径表示，公称直径为内径近似值。在习惯上，它通常用英寸表示，如11/2。除了直接用于输送流体外，低压流体输送用焊接钢管也广泛用作低压流体输送用镀锌焊接钢管的原管。

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.

热镀锌济南方管方管的均匀变形是物体变形的简单，其特点是变形后平面和叙述线仍然是平面和直线。变形后，平行线与平行平面保持平行，立方体垂直于应变主轴方向。均匀变形后，只有线性尺的变化，没有剪切变形。如果变形体是球形，变形后为椭球面。

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.

由此可见，均匀变形的特点是物体各点的位移是原始坐标的线性函数，均匀变形只有三个主要应变，没有剪切应变。

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.

金属压力加工理论中的热镀锌方管。尤其是轧管理论。对数应变被广泛用于表示均匀变形。对数应变比相对变形系的性能更正确地表示物体的变形程度。更多相关内容就来我们网站http://www.jnhxtcg.com咨询吧！

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 http://www.jnhxtcg.com Ask!