熱鍍鋅方管，又稱焊接管，是由鋼板或鋼帶軋制而成的鋼管。焊接鋼管生產工藝簡單，生產效率高，品種規格多，設備投資少，但一般強度低于無縫鋼管。自20世紀30年代以來，隨著優良熱鍍鋅方管軋制生產的快速發展和焊接檢驗技術的進步，焊接質量不斷提高，焊接鋼管的品種和規格不斷增加，無縫鋼管在越來越多的領域被取代。

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.

焊接鋼管按焊縫形式分為直焊管和螺旋焊管。直焊管生產工藝簡單，生產效率高，成本低，發展迅速。螺旋焊管的強度一般高于直焊管。管徑較大的焊管可以用較窄的坯料生產，管徑不同的焊管也可以用相同寬度的坯料生產。然而，與相同長度的直縫管相比，焊縫長度增加了30~100%，生產速度較低。所以，小直徑焊管多采用直縫焊，大直徑焊管多采用螺旋焊。

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.

低壓流體輸送用熱鍍鋅方管又稱普通焊管，俗稱黑管。它是一種焊接鋼管，用于輸送一般低壓流體和其他用途，如水、氣、油和加熱蒸汽。鋼管壁厚分為普通鋼管和加厚鋼管;接管端形式分為無螺紋鋼管和無螺紋鋼管。鋼管規格以公稱直徑表示，公稱直徑為內徑近似值。在習慣上，它通常用英寸表示，如11/2。除了直接用于輸送流體外，低壓流體輸送用焊接鋼管也廣泛用作低壓流體輸送用鍍鋅焊接鋼管的原管。

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.

熱鍍鋅濟南方管方管的均勻變形是物體變形的簡單，其特點是變形后平面和敘述線仍然是平面和直線。變形后，平行線與平行平面保持平行，立方體垂直于應變主軸方向。均勻變形后，只有線性尺的變化，沒有剪切變形。如果變形體是球形，變形后為橢球面。

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.

由此可見，均勻變形的特點是物體各點的位移是原始坐標的線性函數，均勻變形只有三個主要應變，沒有剪切應變。

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.

金屬壓力加工理論中的熱鍍鋅方管。尤其是軋管理論。對數應變被廣泛用于表示均勻變形。對數應變比相對變形系的性能更正確地表示物體的變形程度。更多相關內容就來我們網站http://www.xpj55507.com咨詢吧！

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.xpj55507.com Ask!