Stainless Steel Pipe – From 304 to 904L
March 28, 2026
EN 10216-1 P195 Seamless Steel Pipe: Technical Delivery Conditions & Global Standards
The Definitive Guide to Non-Alloy Seamless Steel pipes for Pressure Purposes: Analyzing Quality TR1 & TR2, Room Temperature Properties, and Engineering Applications.
Technical Index
2. Nomenclature: The ‘P’ and ‘TR’ Logic
3. Seamless Manufacturing Process
4. Delivery Conditions (Normalized vs. Hot Formed)
5. Cast Analysis: TR1 vs. TR2 Chemistry
6. Mechanical Properties & Yield Strength
7. Dimensional Tolerances (D & T Ratio)
8. Logistics & Export Packaging
The EN 10216-1 standard represents the pinnacle of European engineering for non-alloy steel pipes used in pressure systems. Specifically, the P195 grade is designed for applications where specified room temperature properties are the primary design criteria. Unlike other parts of the EN 10216 series which handle elevated temperatures (Part 2) or fine-grain steels (Part 3), Part 1 focuses on cost-effective, high-reliability seamless pipes for general pressure installations.
At Abter Steel, we supply P195 pipes in two distinct qualities: TR1 and TR2. The choice between these two qualities often dictates the safety margin and inspection rigor of the final piping system. This guide provides an exhaustive look into why P195 remains the preferred choice for fluid transport, steam lines, and low-pressure chemical processing.
| Technical Parameter | Specification Detail |
|---|---|
| Standard | EN 10216-1 (Seamless Steel pipes) |
| Steel Grade | P195 (Quality TR1 & TR2) |
| Steel Number | 1.0348 (P195TR2) / 1.0344 (P195TR1) |
| Application | Pressure equipment, fluid transport, general engineering |
The naming convention of EN 10216-1 P195 is not arbitrary. Each character represents a specific mechanical or chemical constraint that engineers must account for during the design phase:
- P: Denotes “Pressure Purposes.” This distinguishes it from structural steels (S) or mechanical steels (E).
- 195: Represents the Minimum Yield Strength in MPa ($$R_{eH}$$) for a wall thickness $\le 16mm$.
- TR1: Qualities without specified aluminum content, impact properties, or specific inspection requirements. Ideal for non-critical systems.
- TR2: High-performance quality with mandatory aluminum content, specified impact energy values (Charpy V-notch), and rigorous testing protocols.
The manufacturing of P195 seamless steel pipes begins with the steel-making process itself. According to EN 10216-1, the steel must be fully killed. This is a critical distinction from semi-killed or rimming steels. Killing the steel involves the addition of deoxidizers (such as Silicon or Aluminum) to ensure the absence of free oxygen during solidification, resulting in a homogeneous grain structure.
“Note: The use of rimming, balanced, or semi-killed steel is strictly prohibited under EN 10216-1 protocols to prevent internal porosity and weld-seam fragility.”
Forming Operations and Heat Treatment
The final properties of the P195 pipe are heavily dependent on the forming operation and the subsequent delivery condition. Hot forming versus cold finishing requires different heat treatment cycles to ensure the grain size meets European standards.
| Forming Operation | Steel Quality | Delivery Condition |
|---|---|---|
| Hot Formed | TR1 | As formed / Normalized / Normalizing-formed |
| TR2 | Normalized or Normalizing-formed | |
| Hot Formed + Cold Finished | TR1 & TR2 | Normalized |
The chemistry of P195 is optimized for weldability and toughness. By strictly limiting Carbon (C) and Silicon (Si) content, the material avoids the formation of brittle martensite during welding, which is essential for onsite pipeline assembly.
Table 2: Chemical Composition for Quality TR2 (% by mass)
| Steel Grade | C max | Si max | Mn max | P max | S max | Cr max | Mo max | Ni max | Al tot min |
|---|---|---|---|---|---|---|---|---|---|
| P195TR2 | 0.13 | 0.35 | 0.70 | 0.025 | 0.015 | 0.30 | 0.08 | 0.30 | 0.02 |
Table 3: Chemical Composition for Quality TR1 (% by mass)
| Steel Grade | C max | Si max | Mn max | P max | S max | Cr max | Mo max | Ni max |
|---|---|---|---|---|---|---|---|---|
| P195TR1 | 0.13 | 0.35 | 0.70 | 0.025 | 0.020 | 0.30 | 0.08 | 0.30 |
For rapid procurement and project estimation, the following parameters define the standard stock availability for EN 10216-1 P195 pipes at major distribution hubs like Tianjin Port.
Physical Parameters
- Outside Diameter: 14mm – 509mm
- Wall Thickness: 2mm – 50mm
- Lengths: 5.8m, 6m, 11.8m, 12m (Custom up to 24m)
- Surface Finish: Black varnish / Oil coating / PE Coating
Supply Chain Info
- Origin: China (Abter Steel Mill)
- Payment: T/T, L/C at Sight
- Lead Time: 7 – 21 Days (Stock dependent)
- Inspection: EN 10204 3.1 / 3.2 (SGS, BV, TUV)
Massive Mechanical Property Tables, Full Dimensional Tolerance Grid, Hydrostatic Pressure Rating Tables.
For pressure applications, the Upper Yield Strength ($R_{eH}$) is the most critical value. Under EN 10216-1, P195 is engineered to maintain structural integrity at room temperature, with specific minimums that vary based on the wall thickness ($T$). As the thickness increases, the cooling rate during normalization changes, leading to slight variations in the grain refinement and, consequently, the yield strength.
Table 4: Mechanical Properties for P195 (TR1 & TR2)
| Steel Name | Min. Upper Yield Strength $R_{eH}$ (MPa) | Tensile Strength $R_m$ (MPa) | Min. Elongation A (%) | |||
|---|---|---|---|---|---|---|
| T ≤ 16mm | 16 < T ≤ 40 | 40 < T ≤ 60 | Long. (l) | Trans. (t) | ||
| P195TR1/TR2 | 195 | 185 | 175 | 320 to 440 | 27 | 25 |
Impact Properties (Exclusive to TR2 Quality)
A major differentiator for the TR2 Quality is the mandatory **Charpy V-notch impact test**. This ensures the material does not undergo brittle fracture at $0^\circ C$. For P195TR2, the minimum average absorbed energy is set to verify the “toughness” of the steel matrix.
| Quality | Temp (°C) | Min. Energy (KV 2 J) Long. | Min. Energy (KV 2 J) Trans. |
|---|---|---|---|
| P195TR2 | 0 | 40 J | 27 J |
| P195TR1 | – | Not Specified | |
In the world of high-pressure fluid dynamics, the T/D Ratio (Thickness-to-Diameter) determines the stress distribution across the pipe wall. EN 10216-1 provides strict tolerance bands to ensure that designers can rely on the nominal values during flow rate and pressure calculations.
Table 5: Tolerances on Outside Diameter (D) and Wall Thickness (T)
| Outside Diameter (D) | Tolerance on D | Tolerance on T for T/D Ratio | |||
|---|---|---|---|---|---|
| ≤ 0.025 | 0.025 < T/D ≤ 0.050 | 0.050 < T/D ≤ 0.10 | > 0.10 | ||
| D ≤ 219.1 mm | ± 1% or ± 0.5 mm (Greater) | ± 12.5% or ± 0.4 mm (Whichever is greater) | |||
| D > 219.1 mm | ± 1% | ± 20% | ± 15% | ± 12.5% | ± 10% |
*Special Clause: For OD ≥ 355.6 mm, local exceeding of the upper wall thickness by an additional 5% is permitted.
Tolerances on Exact Lengths
When ordering fixed or exact lengths (L) for modular skid construction, the following deviations apply:
| Length L (mm) | Tolerance (mm) |
|---|---|
| L ≤ 6,000 | +10 / -0 |
| 6,000 < L ≤ 12,000 | +15 / -0 |
| L > 12,000 | By Agreement (+ / -0) |
The following table represents the **industrial standard sizes** for EN 10216-1 P195. At Abter Steel, our inventory management is centered around these preferred dimensions to ensure 24-hour dispatch for emergency repair projects.
| OD (mm) | 2.0mm WT | 3.2mm WT | 4.0mm WT | 6.3mm WT | 8.0mm WT | 10.0mm WT | 12.5mm WT |
|---|---|---|---|---|---|---|---|
| 21.3 | 0.95 kg/m | 1.43 kg/m | – | – | – | – | – |
| 33.7 | 1.56 kg/m | 2.41 kg/m | 2.93 kg/m | – | – | – | – |
| 48.3 | 2.28 kg/m | 3.56 kg/m | 4.37 kg/m | 6.52 kg/m | – | – | – |
| 60.3 | 2.88 kg/m | 4.51 kg/m | 5.55 kg/m | 8.39 kg/m | 10.3 kg/m | – | – |
| 88.9 | 4.29 kg/m | 6.76 kg/m | 8.38 kg/m | 12.8 kg/m | 16.0 kg/m | 19.5 kg/m | – |
| 114.3 | 5.54 kg/m | 8.77 kg/m | 10.9 kg/m | 16.8 kg/m | 21.0 kg/m | 25.7 kg/m | 31.4 kg/m |
| 168.3 | – | 13.0 kg/m | 16.2 kg/m | 25.2 kg/m | 31.6 kg/m | 39.0 kg/m | 48.0 kg/m |
| 219.1 | – | – | 21.2 kg/m | 33.1 kg/m | 41.6 kg/m | 51.6 kg/m | 63.7 kg/m |
| 273.0 | – | – | 26.5 kg/m | 41.4 kg/m | 52.3 kg/m | 64.9 kg/m | 80.3 kg/m |
| 323.9 | – | – | – | 49.3 kg/m | 62.3 kg/m | 77.4 kg/m | 96.0 kg/m |
Pro Tip for Freight Calculation: All weights are theoretical based on a density of $7.85 kg/dm^3$. For bundled shipments, add a 2% margin for steel strapping and dunnage.
Because EN 10216-1 P195 pipes are non-alloy, they are highly susceptible to oxidation during sea transit. Our standard export protocol at Abter Steel involves a multi-layer protection strategy:
- External Varnish: A clear or black anti-rust lacquer is applied to the outer surface only, unless otherwise specified.
- Internal Oiling: For high-precision applications, we offer light internal oiling to prevent “flash rust” during storage.
- End Protection: Plastic caps for plain ends or recessed metal protectors for beveled ends.
10. Inspection & Testing (UT/ET/Hydro), 11. Non-Destructive Evaluation (NDE) Deep-Dive, 12. MTR Breakdown, and 13. Global Export Case Studies.
To comply with the Pressure Equipment Directive (PED), EN 10216-1 P195 pipes must undergo a series of mandatory and optional tests. The distinction between TR1 and TR2 is most visible here: TR1 is subject to non-specific inspection, while TR2 requires specific inspection (Type 3.1 or 3.2 certification).
Table 6: Summary of Inspection and Testing for P195
| Type of Test | Quality TR1 | Quality TR2 |
|---|---|---|
| Cast Analysis | Mandatory | Mandatory |
| Tensile Test | Mandatory | Mandatory |
| Flattening / Ring Tensile | Mandatory | Mandatory |
| Impact Test (Charpy V) | Not Applicable | Mandatory |
| Hydrostatic Test | Mandatory | Mandatory |
| Dimensional Inspection | Mandatory | Mandatory |
| NDT (Eddy Current/UT) | Optional (In lieu of Hydro) | Mandatory for Seam |
Every P195 pipe must be leak-tested. The test pressure ($P$) is calculated to ensure the hoop stress does not exceed 70% of the minimum yield strength ($R_{eH}$).
Standard Test Formula: $$P = \frac{20 \cdot S \cdot T}{D}$$
Where: $P$ = Bar, $T$ = Wall Thickness, $D$ = Outside Diameter, $S$ = Stress (70% of $R_{eH}$)
At Abter Steel, we utilize automated hydrostatic testing benches that hold the pressure for a minimum of 5 seconds. For clients requiring dry testing, we offer Electromagnetic NDT (Eddy Current) according to EN ISO 10893-1 as a fully compliant alternative to the water pressure test.
An MTR is more than just a piece of paper; it is the legal proof of compliance for your pressure system. When you receive a shipment of P195TR2, look for these specific indicators:
Traceability
The Heat Number (e.g., 55421) must be die-stamped or stenciled on every length of pipe.
Yield/Tensile
Yield must be ≥ 195 MPa. Tensile must fall within the 320–440 MPa range.
Impact Values
For TR2, the MTR must show 3 individual Charpy values with an average ≥ 40J.
Exporting EN 10216-1 P195 pipes from Tianjin, China, requires meticulous attention to maritime conditions. High humidity and salt spray can degrade non-alloy steel within weeks.
| Export Aspect | abter Steel Professional Standard |
|---|---|
| Bundling | Hexagonal bundles with minimum 8-point steel strapping. |
| Containerization | 40ft GP/HQ with specialized dunnage to prevent shifting. |
| Surface Coating | UV-resistant varnish providing 6–12 months of corrosion protection. |
| Documentation | MTR, Bill of Lading, Packing List, Certificate of Origin (Form E/F). |
The following master grid defines the standardized dimensions for EN 10216-1 P195 seamless tubes as per the preferred metric series. Dimensions are categorized by Outside Diameter (D) and Wall Thickness (T). The grey-shaded areas in our technical inventory represent the most commonly manufactured cross-sections for pressure purposes.
• Series 1: Diameters for which all accessories needed for piping systems are standardized.
• Series 2: Diameters for which not all accessories are standardized.
• Series 3: Diameters for special applications with very few standardized accessories.
| Outside Diameter D (mm) | Standard Wall Thickness T (mm) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ser 1 | Ser 2 | Ser 3 | 2.0 | 2.3 | 2.6 | 2.9 | 3.2 | 3.6 | 4.0 | 4.5 | 5.0 | 5.6 | 6.3 | 7.1 |
| 10.2 | – | – | X | – | – | – | – | – | – | – | – | – | – | – |
| 13.5 | – | – | X | X | – | – | – | – | – | – | – | – | – | – |
| 17.2 | – | – | X | X | X | – | – | – | – | – | – | – | – | – |
| 21.3 | – | – | X | X | X | X | X | – | – | – | – | – | – | – |
| 26.9 | – | – | X | X | X | X | X | X | X | – | – | – | – | – |
| 33.7 | – | – | X | X | X | X | X | X | X | X | – | – | – | – |
| 42.4 | – | – | X | X | X | X | X | X | X | X | X | – | – | – |
| 48.3 | – | – | X | X | X | X | X | X | X | X | X | X | – | – |
| 60.3 | – | – | X | X | X | X | X | X | X | X | X | X | X | – |
| 88.9 | – | – | – | – | – | – | X | X | X | X | X | X | X | X |
| 114.3 | – | – | – | – | – | – | – | X | X | X | X | X | X | X |
| 168.3 | – | – | – | – | – | – | – | – | X | X | X | X | X | X |
| 219.1 | – | – | – | – | – | – | – | – | – | X | X | X | X | X |
| 273.0 | – | – | – | – | – | – | – | – | – | – | X | X | X | X |
| 323.9 | – | – | – | – | – | – | – | – | – | – | – | X | X | X |
| 406.4 | – | – | – | – | – | – | – | – | – | – | – | – | X | X |
| 508.0 | – | – | – | – | – | – | – | – | – | – | – | – | – | X |
Preferred Heavy Wall Dimensions (High Pressure)
| OD D (mm) | 10.0mm | 12.5mm | 16.0mm | 20.0mm | 25.0mm | 30.0mm | 40.0mm | 50.0mm | 65.0mm | 80.0mm | 100mm |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 88.9 | X | X | – | – | – | – | – | – | – | – | – |
| 114.3 | X | X | X | – | – | – | – | – | – | – | – |
| 168.3 | X | X | X | X | X | – | – | – | – | – | – |
| 219.1 | X | X | X | X | X | X | – | – | – | – | – |
| 323.9 | X | X | X | X | X | X | X | X | – | – | – |
| 406.4 | X | X | X | X | X | X | X | X | X | – | – |
| 610.0 | – | X | X | X | X | X | X | X | X | X | X |
Global Partner for EN 10216-1 P195 pipes
Whether you are executing a refinery turnaround in Europe or a water treatment project in Southeast Asia, abter Steel provides the technical expertise and logistics speed required for your success. Our P195 seamless pipes are tested, certified, and ready for global deployment.
Keywords: EN 10216-1 P195, Seamless Steel pipe, Quality TR1 vs TR2, 1.0348 Steel, 1.0344 Steel, Pressure Purpose pipes, Steel Pipe Manufacturer China, P195 Mechanical Properties.
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