Seamless steel pipe structure

Seamless steel pipe structure with general structure and mechanical structure of these two, however, it is understood that many people often confuse fluid seamless pipe and seamless steel pipe, in fact, these two tubes are still very different. Here is a brief introduction to the basic knowledge related to seamless steel pipe, come together to understand its overall situation.

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

　　2. The difference between seamless steel pipe and fluid seamless pipe

　　The main difference between these two types of steel pipe is that fluid seamless steel pipe will be tested hydraulically or ultrasonic, eddy current, leakage magnetic flaw detection root by root. Therefore, in the selection of pressure piping standards, it is not appropriate to use seamless steel pipe.

　　3. Seamless steel pipe calculation method

　　The weight of structural steel pipe = 0.25 × π × (OD squared – ID squared) × L × specific gravity of steel. Where π = 3.14, L = structural steel pipe length, the specific gravity of steel is taken as 7.8.

　　Therefore, the weight of seamless pipe = 0.25 × 3.14 × (OD squared – ID squared) × L × 7.8* If the size unit is taken as meter (M), the calculated weight result is kilogram (Kg).

　　4. The use of seamless steel pipe

　　This steel pipe is commonly used in chemical, petroleum, light textile, food, machinery and other industrial erosion-resistant pipes and structural parts and parts made of stainless steel hot-rolled, extruded, expanded and cold-drawn, hot-rolled seamless pipe.