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China EN 10208 Steel Pipes for Combustible Fluids - Supplier and Factory of High-Quality Pipeline Solutions
Ordering Information
When ordering pipes conforming to EN 10208, the following must be specified:
- Standard designation (EN 10208-1 or EN 10208-2)
- Type of pipe (seamless or welded)
- Dimensions (outside diameter, wall thickness, length)
- Steel grade (e.g., L245, L415, etc.)
- Requirement Class (A or B)
- Delivery condition (e.g., normalized, quenched and tempered)
- Inspection and testing requirements (e.g., non-destructive testing, hydrostatic test)
- Additional requirements (e.g., impact testing at lower temperatures, supplementary chemical analysis)
Main Steel Grades
Steel grades are designated by "L" followed by the minimum yield strength (in MPa). Common grades include:
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Application |
|---|---|---|---|
| L245 | ≥245 | 415–760 | Low-pressure systems |
| L290 | ≥290 | 415–760 | General pipelines |
| L360 | ≥360 | 460–760 | Medium-pressure systems |
| L415 | ≥415 | 520–760 | High-strength pipelines |
| L450 | ≥450 | 535–760 | Demanding environments |
| L485 | ≥485 | 570–760 | High-pressure / critical use |
📌 Note: Higher grades (e.g., L555, L690) may also be included depending on the version/supplement.
Inspection & Testing Requirements
Class A Basic Requirements
- Chemical analysis (C, Si, Mn, P, S, etc.)
- Tensile test (yield strength, tensile strength, elongation)
- Hydrostatic test (minimum test pressure specified)
- Visual inspection (surface defects)
Class B Stringent Requirements
- All tests from Class A, plus:
- Impact testing (Charpy V-notch at specified temperatures)
- Non-destructive testing (NDT) — ultrasonic, radiographic, or magnetic particle inspection
- Additional mechanical tests (flattening, bend, or hardness test if required)
Other Key Requirements
- Delivery condition: Pipes may be supplied in normalized, quenched and tempered, or as-rolled condition.
- Dimensions & tolerances: Compliant with EN ISO 1127 (seamless) or EN ISO 1129 (welded).
- Marking & certification: Pipes must be marked with standard, grade, manufacturer, and inspection certificate (EN 10204 Type 3.1 or 3.2).
Conclusion
EN 10208:2009 is a critical standard for steel pipes in combustible fluid transportation, with Class B pipes undergoing stricter testing for high-risk applications. Key considerations include material grade selection, inspection level, and certification requirements based on operational demands.
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❓ Frequently Asked Questions (FAQ)
Q What is EN 10208 and what does it cover?
EN 10208 is a European standard that specifies technical delivery conditions for steel pipes used in pipelines for combustible fluids, including natural gas, oil, and other flammable media. It is divided into two parts: EN 10208-1 (Requirement Class A) and EN 10208-2 (Requirement Class B).
Q What is the difference between EN 10208-1 (Class A) and EN 10208-2 (Class B)?
EN 10208-1 (Class A) covers basic requirements suitable for lower-risk applications, while EN 10208-2 (Class B) imposes stricter mechanical and non-destructive testing requirements, including Charpy impact testing and NDT, making it appropriate for high-pressure and safety-critical pipelines.
Q Which steel grades are available under EN 10208?
Common steel grades include L245, L290, L360, L415, L450, and L485, designated by "L" followed by the minimum yield strength in MPa. Higher grades such as L555 and L690 may also be available depending on the standard version or supplement applied.
Q What types of pipes are covered by EN 10208?
EN 10208 covers both seamless and welded steel pipes. Dimensional tolerances for seamless pipes comply with EN ISO 1127, while welded pipes comply with EN ISO 1129.
Q What certifications and markings are required for EN 10208 pipes?
Pipes must be marked with the applicable standard, steel grade, manufacturer's identification, and must be supplied with an inspection certificate in accordance with EN 10204 — typically Type 3.1 or Type 3.2 depending on the project requirements.
Q What information is needed when placing an order for EN 10208 pipes?
When ordering, you must specify the standard designation (EN 10208-1 or EN 10208-2), pipe type, dimensions (OD, wall thickness, length), steel grade, requirement class, delivery condition, inspection and testing requirements, and any additional requirements such as low-temperature impact testing or supplementary chemical analysis.