bearing pressure seamless steel Pipe
The core standard for pressure-bearing seamless steel pipes is the EN 10216 series, issued by CEN, covering non-alloy, alloy, fine-grained, and high/low-temperature specialized pressure-bearing seamless pipes, which is used in conjunction with the PED directive for compliance with EU pressure equipment regulations. Below are the key contents and selection guidelines.
1. Core Standard System (EN 10216 Series)
Standard Number | name | Core use cases | typical steel grade | Key Requirements |
EN 10216-1:2013 | Room temperature performance of non-alloy steel pipe | Medium and low-pressure ambient temperature fluids, pressure vessels, process pipelines | P195TR、P235GH、P265GH | Mechanical properties at room temperature, hydrostatic pressure / non-destructive testing |
EN 10216-2:2013+A1:2019 | High temperature performance non-alloy / alloy steel pipe | power plant boiler, superheater, reheater | P235GH、P265GH、13CrMo4-5 | High Temperature Tensile / Creep and Heat Treatment Control |
EN 10216-3:2013 | fine-grained alloy steel pipe | High-temperature and high-pressure main steam pipeline, chemical reactor | 16Mo3、P91/P92 | fine-grained structure, high temperature creep strength |
EN 10216-4:2013 | Non-alloy / Alloy Steel Pipe with Low Temperature Performance | Low Pressure Vessel and LNG/Ethylene Pipeline | P355NL1/NL2 | Low-temperature impact toughness (-20°C to-60°C) |
EN 10216-5:2013 | stainless steel pipe | corrosion resistant high pressure condition | 1.4401(304)、1.4406(316L) | intergranular corrosion and corrosion resistance verification |
2. Common Steel Grades and Critical Properties (EN 10216-1/-2/-3)
steel grade | Minimum yield (MPa) | Tensile range (MPa) | applicable temperature | Typical application |
P235GH | 235 | 360-500 | ≤425℃ | Medium and low-pressure boilers, heat exchangers |
P265GH | 265 | 410-570 | ≤450℃ | medium and high pressure steam pipeline |
16Mo3 | 270 | 450-600 | ≤530℃ | Power plant reheater, chemical high-temperature tubes |
P91 | 415 | 585-760 | ≤600℃ | supercritical boiler main steam / reheating pipe |
III. Key Technical Requirements
- Manufacturing and Inspection: Hot rolling / cold drawing, requiring normalizing / tempering; 100% hydrostatic test (≥1.5×design pressure, holding pressure for ≥10 seconds), high-pressure pipe with ultrasonic / eddy current testing.
- Dimensional tolerance: outer diameter ±1%, wall thickness ±12.5% (per EN ISO 1127).
- Compliance: Must comply with EU PED 2014/68/EU and be accompanied by an EN 10204-3.1B quality certificate.
IV. Model Selection Quick Reference Table
operating mode | priority standard | Recommended steel grade | substitute national standard reference |
room temperature low-pressure water/gas | EN 10216-1 | P235GH/P265GH | GB/T 8163 20# |
medium and high pressure boiler / superheater | EN 10216-2 | P265GH/16Mo3 | GB/T 5310 20G |
super high pressure and high temperature main steam pipe | EN 10216-3 | P91/P92 | GB/T 5310 T91 |
low temperature and high pressure vessel | EN 10216-4 | P355NL2 | GB/T 6479 16MnDG |
V. Correspondence with National Standards
- EN 10216-1 ≈GB/T 8163 (Medium and Low Pressure Fluids)
- EN 10216-2 ≈GB/T 5310 (High-Pressure Boilers)
- EN 10216-3 ≈GB/T 9948 (Petroleum Cracking Tubes)
- EN 10216-4 ≈GB/T 6479 (Low-temperature Pipelines)
Comprehensive score