EN 10216-1 specifies the technical delivery conditions for non-alloy seamless steel tubes for pressure purposes. P235TR1 is a grade under this standard, primarily used in boilers, heat exchangers, and pressure vessels due to its good strength and weldability.
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Element |
Composition (%) |
Carbon (C) |
≤ 0.16 |
Silicon (Si) |
≤ 0.35 |
Manganese (Mn) |
≤ 1.20 |
Phosphorus (P) |
≤ 0.025 |
Sulfur (S) |
≤ 0.015 |
Low carbon content ensures good weldability and forming properties.
Property |
Value |
Minimum Yield Strength (MPa) |
235 |
Tensile Strength (MPa) |
360 - 500 |
Elongation (%) |
≥ 25 |
Impact Toughness |
Not specified for TR1 |
High elongation ensures good ductility, making it suitable for pressure applications.
✅ Hot Finished (HF) or Cold Finished (CF) Seamless Pipes
Manufactured by hot rolling or cold drawing, depending on required tolerances.
No specific heat treatment is required for P235TR1, but normalizing can be applied based on customer needs.
✅ Surface Finish
Pipes can be black-painted, oiled, or shot-blasted to prevent corrosion.
Ends can be plain, beveled, or threaded as per application requirements.
P235TR1 tubes undergo several quality control tests to meet EN 10216-1 standards:
(1) Chemical & Mechanical Testing
Spectrochemical Analysis: Ensures material composition.
Tensile Test: Confirms yield strength and tensile strength.
Hardness Test: Checks surface hardness.
(2) Non-Destructive Testing (NDT)
Eddy Current Testing (ET): Detects surface defects.
Ultrasonic Testing (UT) (if required): Finds internal flaws.
(3) Dimensional & Surface Inspection
Ensures outer diameter (OD), wall thickness (WT), and length comply with EN 10216-1 tolerances.
Surface quality is checked for cracks, scale, or other defects.
(4) Pressure & Leak Testing
Hydrostatic Test (HT): Ensures pipe integrity under pressure conditions.
- Boilers & Heat Exchangers – High temperature and pressure resistance.
- Pressure Pipelines – Used in gas, steam, and air transport under moderate pressure.
- Machinery Construction – Components requiring good machinability and weldability.
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