One: According to the knowledge of stainless steel square tube, spiral tube seamless tube, seamless steel tube outer diameter specification and wall thickness calculation method to withstand pressure (different steel pipe material has different tensile strength) pressure = (wall thickness * 2 * steel pipe material tensile strength) /(Outer diameter*factor)
Two: The calculation method of finding the wall thickness of seamless steel pipe by knowing the outer diameter of seamless steel pipe and bearing pressure: Wall thickness=(pressure*outer diameter*factor)/(2*tensile strength of steel pipe material)
Three: Rectangular tube, spiral tube steel pipe pressure coefficient expression method: pressure P<7Mpa coefficient S=8
717.5 coefficient S=4
How to calculate the pressure of stainless steel pipe:
1. Calculation formula: 2X wall thickness X (tensile strength X40%) * outer diameter
2. 316, 316L, TP316, TP316L-tensile strength: 485MA
3. 321, 304, 304L-tensile strength: 520MA
The tensile strength of 304 stainless steel pipe is 520MPA, the tensile strength of 316 stainless steel pipe is 485MPA
The water pressure that the stainless steel pipe can withstand is not the same as the pressure value of different materials; the outer diameter and wall thickness are also very important factors. The thicker the wall thickness, the greater the pressure value it can withstand, such as the same outer diameter. 10 thick stainless steel pipes can withstand much higher water pressure than 5 thick stainless steel pipes; in addition, it is also related to the outer diameter. The larger the outer diameter, the smaller the pressure value it can withstand, such as the same wall thickness. , The larger the outer diameter, the smaller the pressure value it can bear; the calculation formula for the pressure of the stainless steel pipe: Hydrostatic test pressure: P=2SR/D
S refers to the wall thickness, r refers to 40% of the tensile strength, and D refers to the outer diameter; the following examples illustrate:
304 stainless steel pipe specification: 159*3 P=2*520*0.4*3/159=7.84MPA 316 stainless steel pipe specification: 159*3 P=2*485*0.4*3/159=7.32MPA stainless steel seamless pipe as required The different classifications are as follows:
According to the production process, it is divided into: stainless steel cold drawn pipe and stainless steel precision pipe.
According to section
According to the caliber, it can be divided into: large-diameter stainless steel tube, small-diameter stainless steel tube, stainless steel capillary tube
According to search habits, it can be divided into: stainless steel seamless pipe, seamless stainless steel pipe, stainless steel pipe, stainless steel pipe, stainless steel seamless pipe
Divided by material: 201 stainless steel seamless pipe, 202 stainless steel seamless pipe, 301 stainless steel seamless pipe, 304 stainless steel seamless pipe, 316L stainless steel seamless pipe, 310S
Calculation formula method of seamless steel pipe bearing pressure
One: Know the calculation method of seamless pipe outer diameter specification wall thickness of seamless steel pipe to withstand pressure (different steel pipes have different tensile strengths) Pressure = (wall thickness*2*steel pipe material tensile strength)/(outer diameter*factor )
Two: The calculation method of finding the wall thickness of seamless steel pipe by knowing the outer diameter of seamless steel pipe and bearing pressure: Wall thickness=(pressure*outer diameter*factor)/(2*tensile strength of steel pipe material)
Three: Expression method of steel pipe pressure coefficient: pressure P<7Mpa coefficient S=8
717.5 coefficient S=4
Theoretical weight table of steel pipe Unit: Kg/m Wall thickness Outer diameter 3 3.5 4 4.5 5 5.5 6 Note: The calculation formula for calculating the theoretical weight of commonly used profiles: m=F×L×ρ
m-mass Kg; F-section area m2/m; L-length m; ρ-density *Kg/m3 ☆Among them: F section area calculation method: 1. Square steel F= a2
2. Steel pipe F=3.1416×$(D-$) D-diameter $-thickness 3. Steel plate, flat steel F= a×$ a-width Density:
Steel: 7.85*103 kg/m3 Aluminum: 2.5～2.95*103 Copper: 8.45～8.9*103 Cast iron: 6.6～7*103 Nylon: 1.04～1.15*103 Small diameter seamless steel pipe classification High quality carbon structural steel Carbon structure steel
Low-alloy high-strength structural steel Alloy structural steel Stainless steel 20# structural steel
General specifications of small-diameter seamless steel pipes
People with an outer diameter between (3mm-42mm) are used to call them small-diameter seamless pipes because of their relatively small diameter.
The wall thickness (0.8mm-12mm) can actually be divided into: small-diameter thick-walled seamless pipe, small-diameter thin-walled seamless pipe.
