Seamless steel pipes with small outer diameters are called small-diameter seamless steel pipes. Small-diameter seamless steel pipes can be further divided into: seamless small-diameter steel pipes and straight-seam (also known as welded) small-diameter seamless steel pipes. However, many people don't know much about them. What are the specifications of small-diameter seamless steel pipes?
Small-diameter seamless steel pipes generally have an outer diameter between 6-89 mm, which is relatively small. Wall thicknesses between 1-12 mm can be further divided into small-diameter thick-walled seamless pipes and small-diameter thin-walled seamless pipes. The weight calculation formula is: [(outer diameter - wall thickness) * wall thickness] * 0.02466 = kg/meter (weight per meter)
Hot-rolled seamless steel pipes typically have an outer diameter greater than 32mm and a wall thickness of 2.5-75mm. Cold-rolled seamless steel pipes can have an outer diameter down to 6mm and a wall thickness down to 0.25mm. Thin-walled pipes can have an outer diameter down to 5mm and a wall thickness less than 0.25mm. Cold-rolled pipes have higher dimensional accuracy than hot-rolled pipes. In pipeline engineering, hot-rolled pipes are often selected when the pipe diameter exceeds 57mm, while cold-drawn (rolled) pipes are commonly used when the pipe diameter is less than 57mm. The specifications for small-diameter seamless steel pipes are approximately as follows:
6*1, 18*5, 25*6, 8*1, 18*6, 25*7, 8*1.5, 19*1.5, 25*8, 8*2, 19*2, 27*2, 10*1, 19*2.5, 27*2.5, 10*1.5, 19*3, 27*3, 10*2, 19*4, 27*4, 10*2.5, 19*5, 27*5, 12*1, 20*1.5, 27*6, 12*1.5, 20*2, 27*7, 12*2, 20*2.5, 28*2, 12*2.5, 20*3, 28*2.5, 12*3, 20*4, 28*3, 14*1.5, 20*5, 28*3.5, 14*2, 20*6, 28*4, 14*2.5, 22*1.5, 28*5, 14*3, 22*2, 28*6, 14*4, 22*2.5, 28*7, 16*1.5, 22*3, 30*2, 16*2, 22*4, 30*3, 16*2.5, 22*5, 30*4, 16*3, 22*6, 30*5, 16*4, 25*1.5, 30*6, 16*5, 25*2, 30*7, 18*1.5, 25*2.5, 30*8, 18*2, 25*3, 41*2, 18*2.5, 25*3.5, 18*3, 25*4, 18*4, 25*5.
What are small-diameter seamless steel pipes?
Generally, the seamless steel pipes used in daily life are of normal diameter. Small-diameter seamless steel pipes are used in some special applications. Today, we'll introduce some relevant knowledge about small-diameter seamless steel pipes to help you better utilize this type of pipe in the future. Generally speaking, seamless steel pipes with small outer diameters are collectively referred to as small-diameter seamless steel pipes, but there is still a specific range. Generally, pipes with a diameter below 89mm and above 4mm can be called small-diameter seamless steel pipes.Specifications of small diameter seamless steel pipes
In most cases, small-diameter seamless steel pipes are also used as pipelines for transporting fluids. Compared with solid steel materials such as round steel bars, they are lighter in weight while maintaining the same bending and torsional strength, making them an economical type of steel. They are widely used in the manufacture of structural components and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle frames, and steel scaffolding used in construction.Small-diameter seamless steel pipes generally have an outer diameter between 6-89 mm, which is relatively small. Wall thicknesses between 1-12 mm can be further divided into small-diameter thick-walled seamless pipes and small-diameter thin-walled seamless pipes. The weight calculation formula is: [(outer diameter - wall thickness) * wall thickness] * 0.02466 = kg/meter (weight per meter)
Hot-rolled seamless steel pipes typically have an outer diameter greater than 32mm and a wall thickness of 2.5-75mm. Cold-rolled seamless steel pipes can have an outer diameter down to 6mm and a wall thickness down to 0.25mm. Thin-walled pipes can have an outer diameter down to 5mm and a wall thickness less than 0.25mm. Cold-rolled pipes have higher dimensional accuracy than hot-rolled pipes. In pipeline engineering, hot-rolled pipes are often selected when the pipe diameter exceeds 57mm, while cold-drawn (rolled) pipes are commonly used when the pipe diameter is less than 57mm. The specifications for small-diameter seamless steel pipes are approximately as follows:
6*1, 18*5, 25*6, 8*1, 18*6, 25*7, 8*1.5, 19*1.5, 25*8, 8*2, 19*2, 27*2, 10*1, 19*2.5, 27*2.5, 10*1.5, 19*3, 27*3, 10*2, 19*4, 27*4, 10*2.5, 19*5, 27*5, 12*1, 20*1.5, 27*6, 12*1.5, 20*2, 27*7, 12*2, 20*2.5, 28*2, 12*2.5, 20*3, 28*2.5, 12*3, 20*4, 28*3, 14*1.5, 20*5, 28*3.5, 14*2, 20*6, 28*4, 14*2.5, 22*1.5, 28*5, 14*3, 22*2, 28*6, 14*4, 22*2.5, 28*7, 16*1.5, 22*3, 30*2, 16*2, 22*4, 30*3, 16*2.5, 22*5, 30*4, 16*3, 22*6, 30*5, 16*4, 25*1.5, 30*6, 16*5, 25*2, 30*7, 18*1.5, 25*2.5, 30*8, 18*2, 25*3, 41*2, 18*2.5, 25*3.5, 18*3, 25*4, 18*4, 25*5.
