DIN 17172 StE 210.7 Gas Steel Pipe Low Alloy Long Distance For Flammable Gas Transportation
DIN 17172 StE 210.7 StE 240.7 StE 290.7 StE 320.7 StE 360.7 Gas Steel Pipe Low Alloy Long Distance For Flammable Gas Transportation
Introduction
DIN 17172 is a standard that specifies the requirements for low alloy steel pipes used in the transportation of flammable gases over long distances. The grades StE 210.7, StE 240.7, StE 290.7, StE 320.7, and StE 360.7 are designed to provide excellent mechanical properties and corrosion resistance, making them suitable for various applications in the gas industry.
Material Specification
The materials used in the production of these steel pipes must meet specific chemical and mechanical properties to ensure safety and reliability in gas transportation.
Key Features
- Low Alloy Composition: Enhances strength and toughness.
- High Weldability: Suitable for various welding techniques.
- Corrosion Resistance: Provides durability in harsh environments.
- High Strength: Capable of withstanding high pressures.
Chemical Composition
| Steel Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) |
|---|---|---|---|---|---|---|---|---|
| StE 210.7 | 0.10 | 0.20 | 1.20 | 0.025 | 0.015 | 0.30 | 0.30 | 0.10 |
| StE 240.7 | 0.12 | 0.25 | 1.40 | 0.025 | 0.015 | 0.40 | 0.40 | 0.15 |
| StE 290.7 | 0.14 | 0.30 | 1.50 | 0.025 | 0.015 | 0.50 | 0.50 | 0.20 |
| StE 320.7 | 0.16 | 0.35 | 1.60 | 0.025 | 0.015 | 0.60 | 0.60 | 0.25 |
| StE 360.7 | 0.18 | 0.40 | 1.70 | 0.025 | 0.015 | 0.70 | 0.70 | 0.30 |
Mechanical Properties
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Impact Toughness (J) |
|---|---|---|---|---|
| StE 210.7 | 210 | 350 | 22 | 27 |
| StE 240.7 | 240 | 370 | 20 | 27 |
| StE 290.7 | 290 | 400 | 18 | 27 |
| StE 320.7 | 320 | 430 | 16 | 27 |
| StE 360.7 | 360 | 460 | 14 | 27 |
Steel Grade
The steel grades StE 210.7, StE 240.7, StE 290.7, StE 320.7, and StE 360.7 are categorized based on their yield strength and chemical composition, making them suitable for various applications in the gas transportation sector.
Application
These steel pipes are primarily used in:
- Natural Gas Transportation: Long-distance pipelines for natural gas.
- Flammable Gas Distribution: Infrastructure for distributing flammable gases.
- Industrial Applications: Used in various industries requiring safe gas transportation.
Possible Alternative Grades
While DIN 17172 grades are widely used, alternative grades may include:
- API 5L: Suitable for oil and gas pipelines.
- ASTM A106: Commonly used for high-temperature service.
- EN 10208: European standard for gas pipelines.
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