Strength of steel springboard
Steel springboard is an important type of steel springboard, in the process of using the steel springboard also need to pay attention to a variety of problems, generally speaking, the strength of the steel springboard is relatively large, many places are made use of the strength of the steel springboard, in fact, before the use of steel springboard for its strength is also to be constantly carried out to understand. The strength of the common steel springboard can be calculated. What is the common calculation method? We and the steel springboard factory Xiaobian together to calculate it:
Suppose the tensile strength of the material is σ, the pressure is P, and the outer diameter of the pipe is D. Tube wall thickness δ=(P*D)/(2*σ/S), where S is the safety factor; Because P is less than 7MPa,S is S=8; If P is less than 17.5MPa,S is chosen as S=6. P greater than 17.5MPa,S choose S=4;
Let's say the safety factor is S=6; The tensile strength of steel 20 is 410MPa, so the pressure that the pipe can bear P=(2*σ/S*δ)
/D =(2*410/6*3)/(10+6)
=26.25MPa set 17.5, so the safety factor is S=4
Therefore, the pressure that the pipe can bear P=(2*σ/S*δ)
/D =(2*410/4*3)/(10+6) =39.375MPa
Example: The heating tube of GL heater uses φ18*2.5 steel springboard initially instead of the usual φ18*2 steel springboard (20# steel). Then, can the φ18*2 steel springboard withstand the steam pressure of 2.2MPa?
