Why do we need to calculate the pressure inside the pipe when constructing a pipeline system, an oil or gas pipeline? To answer this question, let's explore the post below with VHE to understand how to calculate the pressure inside cast steel pipes at minimum yield strength!
Most people, when buying steel pipes for installation, do not know how to do pressure calculations to choose the right type of pipe. Therefore, when calculating this value, we can know whether to choose a thick tube or not. Or choose a tube with a larger diameter.
Below is the pressure calculation formula derived from the scientific research work of mathematician Peter Barlow. This is the formula that has been recognized by many scientific councils around the world and is used in many places as a standard to determine material quality.
Formula to calculate the working pressure of steel pipes:
And:
- 1 Mpa = 1,000,000 Pa
- 1 Mpa = 1,000 kPa
- 1 MPa = 10 Bar
- 1 Mpa = 1,000,000 N/m2
- 1 MPa = 100 N/cm2
- 1 Mpa = 1 N/mm2
- 1 Mpa = 1,000 kN/m2
- 1 Mpa = 0.1 kN/cm2
- 1 Mpa = 0,001 Kn/cm2
- 1 Mpa = 101,971.6213 kg/m2
- 1 Mpa = 10.19716213 tons/cm2
- 1 Mpa = 0.1019716213 kg/mm2
- 1 Mpa = 101.9716213 tons/m2
- 1 Mpa = 0.01017916213 tons/cm2
- 1 Mpa = 0,0001017916213 tons/mm2
| Steels | Standard | Equivalent steel grade | Yield limit (σ0.2) (N/mm2) | Application | |
| CT3 | ГOCT 380-71 | CT38 | TCVN 1765- 75 | ≥ 210 | - A common type of rolled steel, carburized - Usually supplied hot rolled, in the Normalized state and without further heat treatment to increase durability - Mainly used in construction structures and common machine parts |
| SS400 (SS41) |
JIS G3101- 1987 | ||||
| C45 | TCVN 1765- 75 | 45 | ГOCT 1050- 74 | ≥ 360 | - It is a good quality structural steel and carbon steel - Usually sugar is supplied in the form of rolled, threaded and semi-finished products - Mainly used to make machine parts, very advanced for determining hot processing mode and part durability |
| S45C | JIS G4051- 1979 | ||||
| 1045 | AISI | ≥ 390 | |||
| C55 | TCVN 1765- 75 | 55 | ГOCT 1050- 74 | ||
| S55C | JIS G4051- 1979 | ||||
| 1055 | AISI | ||||
| CM55 | DIN | ||||
| C65 | TCVN 1765- 75 | 65 | ГOCT 1050- 74 | ≥ 420 | |
| Inox 304 | AISI | 08Cr18Ni10 | TCVN | ≥ 201 | - Is a type of stainless steel belonging to the austenitic family, non-magnetic - Commonly used in the chemical industry, food processing, medical equipment, etc. |
| SUS 304 | JIS | ||||
| 304L | AISI | SUS 304L | JIS | ≥ 175 | |
| SUS 316 (Inox 316) |
JIS | ≥ 205 | - Is a type of stainless steel belonging to the austenitic family, non-magnetic - Higher abrasion resistance than SUS304. - Commonly used in the chemical industry, food processing, medical equipment, etc. |
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