Do you know there are two kinds of seamless steel pipe for structure?

The structural seamless steel pipe is of general structure and mechanical structure. However, it is understood that many people often confuse the fluid seamless steel pipe and the structural seamless steel pipe. In fact, the two kinds of pipes are quite different. The following is a brief introduction to the structure of seamless steel pipe related basic knowledge, together to understand its overall situation.

1. Seamless steel pipe for structure is a kind of seamless steel pipe due to its different uses. This kind of seamless pipe is used for general structure and mechanical structure. The representative seamless steel tubes used for structure are carbon steel 20# and 45# steel, Q235, alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35crmo, 42CrMo, etc.

2. The difference between structural seamless steel pipe and fluid seamless pipe
The main difference between the two kinds of steel pipes is that the hydraulic test or ultrasonic, eddy current and magnetic flux leakage inspection will be carried out one by one. Therefore, in the selection of pressure pipe standard, it is not suitable to use seamless steel pipe for structure.

3. Calculation method of seamless steel pipe for structure
The weight of structural steel pipe is 0.25 *π*(square of outer diameter to square of inner diameter) * L * specific gravity of steel. Where π = 3.14, l = the length of structural steel pipe, the specific gravity of steel is 7.8.
Therefore, the weight of structural seamless steel pipe is 0.25 * 3.14 * (square of outer diameter to square of inner diameter) * L * 7.8 * if the dimension unit is meter (m), the calculated weight is kg (kg).

4. Application of structural seamless steel pipe
This kind of steel pipe is widely used in chemical, petroleum, textile, medical, food, machinery and other industries corrosion-resistant pipes and structural parts and parts made of stainless steel, hot-rolled, extruded, expanded and cold drawn, rolled seamless steel pipe.