无缝异型钢管的基本信息：包括横断面轮廓非圆形的、等壁厚的、变壁厚的、沿长度方向变直径和变壁厚的、断面对称和不对称的等。如方形、矩形、锥形、梯形、螺旋形等。无缝异型钢管更能适应使用条件的特殊性，节约金属和提高零部件制造的劳动生产率。其广泛应用在航空、汽车、造船、矿山机械、农业机械、建筑、轻纺以及锅炉制造等方面。生产异型管的方法有冷拔、电焊、挤压、热轧等，其中冷拔法得到了比较广泛的应用。
The basic information of seamless special-shaped steel pipe includes non-circular cross-section outline, equal wall thickness, variable wall thickness, variable diameter and wall thickness along length direction, symmetrical and asymmetrical cross-section, etc. Such as square, rectangular, conical, trapezoidal, spiral and so on. Seamless special-shaped steel pipe can better adapt to the particularity of service conditions, save metal and improve labor productivity of parts manufacturing. It is widely used in aviation, automobile, shipbuilding, mining machinery, agricultural machinery, construction, textile and boiler manufacturing. Cold drawing, welding, extrusion and hot rolling are the main methods to produce special-shaped pipes, among which cold drawing is widely used.
下面来看看无缝异型钢管的分类：异型管，异型方管、矩异型管、异型焊管、螺旋焊管，规格：20*20mm-500mm，壁厚0.6mm-20mm，螺旋钢管.螺旋钢管规格，219mm-2020mm，壁厚5mm-20mm.直缝规格有4分、6分、1寸、1.2寸、1.5寸、2寸、102、108、127、133、139、194、219、273、325等规格异型管一般多是指方矩型钢管。
Let's look at the classification of seamless special-shaped steel pipes: special-shaped pipes, square pipes, rectangular special-shaped pipes, special-shaped welded pipes, spiral welded pipes, specifications: 20*20mm-500mm, wall thickness 0.6mm-20mm, spiral pipe specifications, 219mm-2020mm, wall thickness 5mm-20mm. Straight seam specifications have 4 points, 6 points, 1.2 inches, 1.5 inches, 2 inches, 102, 108, 127, 139, 194, 219, 273, 325 and other specifications. Typical pipe usually refers to rectangular steel pipe.
无缝异型钢管厂拥生产机械分为两种工艺，一种是采用金属型材滚轧技术，另一种是采用异型模具冷拔技术。两种工艺都是以圆管为原材料，将各种金属类圆管(如焊管、不锈钢管、无缝管、镀锌管、铜管、合金管等各种金属管)滚轧成各种金属类异型管(如椭圆管、平椭管，D型管、半圆管、六角管、蘑菇管、面包管、元宝管、T型管、H型管、三角管、方距管、方管等)所有金属类异型管，操作简便、产量高、无损耗、成本低、无表面明显刮伤，更换模具时间短，可做多种材质、形状、厚度等优点，从多方面满足了社会生产需求。
The production machinery of seamless profiled steel pipe mill can be divided into two processes, one is the rolling technology of metal profiles, the other is the cold drawing technology of profiled dies. Both processes are based on circular pipe as raw material, rolling all kinds of metal circular pipe (such as welded pipe, stainless steel pipe, seamless pipe, galvanized pipe, copper pipe, alloy pipe, etc.) into all kinds of metal special-shaped pipe (such as ellipse pipe, ellipse pipe, D-shaped pipe, semi-circular pipe, hexagonal pipe, mushroom pipe, bread pipe, Yuanbao pipe, T-shaped pipe, H-shaped pipe, triangular pipe, square pipe, square pipe, etc.). It is a kind of special-shaped pipe. It has the advantages of simple operation, high output, no loss, low cost, no obvious scratch on the surface, short time to replace the mould, and can be made of various materials, shapes and thicknesses. It meets the needs of social production in many ways.
