EN 10217-1


EN 10217-1

The EN 10217-1 standard is the European standard for welded pressure pipes, it governs the technical requirements for carbon steel tubes. This standard is suitable for welding carbon steel tubes which having specified room temperature properties and rated pressures. 

The essential requirements of this standard are minimum yield point strength and tensile strength, elongation, weldability, Impact values, non-destructive test, etc. This standard is widely used in the construction of pressure vessels and piping systems in the oil and gas, petrochemical, and Power industries.

Steel Grades PRODUCTS of EN 10217-1 Pipes

The EN 10217-1 steel grade name is designated by:

  • P: Pressure purposes;
  • Number: The specified yield strength for thickness less than or equal to 16mm (MPa);
  • TR1: Qualities withous specified aluminium content and specified impact properties and with non-specific inspection requirements;
  • TR2: Qualities withous specified aluminium content, specified impact properties either non-specific or specific inspection requirements.
EN10217 P195 TR1

P195 TR1

P195 is one of the steel grades in the EN 10217 standard and has a lower strength. It is commonly used for general structural applications such as building frames, parapets, pipe supports, etc.

EN10217 P195 TR2

P195 TR2

EN 10217 P195TR2 tubes have more stringent technical requirements for higher loads and structural applications requiring higher strength.

EN10217 P235 TR1

P235 TR1

EN-102117-1 P235 steel pipe is it is typically used in structural applications where moderate strength and durability are required, such as supports for industrial equipment and bridge structures.

EN10217 P235 TR2

P235 TR2

The production and testing requirements for EN 10217 TR2 steel pipe are more stringent, including dimensional control, chemical composition and mechanical properties.

EN10217 P265 TR1

P265 TR1

It is mainly used for structural applications requiring higher strength and durability, such as high-pressure pipelines and heavy machinery supports. Suitable for projects with high loads and high strength requirements.

EN10217 P265 TR2

P265 TR2

This type of EN 10217 pipe is suitable for projects that require high strength and durability, such as high-pressure pipelines and bridge structures.

Appearance of EN 10217-1 Pipes

- Weld Seam

The weld area of EN 10217-1 pipe is a critical component that must be free from cracks, lack of fusion, and lack of penetration. Any repairs to the weld seam of EW and HFW tubes are not permitted. Repairs to the weld seam of SAW tubes shall be allowed if done by an agreed documented procedure. This is to ensure the structural integrity of the pipe and to prevent any potential leaks.

- Tube Surface

The EN 10217-1 pipe has specific requirements for its surface to be considered usable. The tube must be free of any external or internal surface defects that can be detected by a visual examination of the surfaces. Additionally, the finish and surface condition should not be such that any surface imperfections would require dressing. However, if it is necessary to dress the surface imperfections, they can only be ground or machined down. The wall thickness in the dressed area must not fall below the specified minimum wall thickness after dressing. Finally, all dressed areas must blend smoothly into the contour of the tube without any visible imperfections.

Chemical Composition for EN 10217-1 Non-Alloy Steel Tubes

- Chemical Composition

Steel Grade











Cr b


Mo b


Ni b


Al tot


Cu b c


Nb b


Ti b


V b


Cr+Cu+Mo+Ni b


Steel NameSteel Number
P195TR21.01081335702520308300,02 d30104270
p235TR21.025516351202520308300,02 d30104270
P265TR21.025920401402520308300,02 d30104270
  Elements not included in this Table shall not be intentionally added to the steel without the agreement of the purchaser, except for elements which may be added for finishing the cast. All appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steel making process.
b    The content of these elements need not be reported unless intentionally added to the cast.
c    Option 3: In order to facilitate subsequent forming operation, an agreed maximum copper content lower than indicated and an agreed specified maximum tin content shall apply.
d    This requirement is not applicable provided the steel contains a sufficient amount of other nitrogen binding elements, which shall be reported.

- Permissible Deviations of EN 10217-1 Product Analysis

Steel GradesTensile PropertiesImpact Properties
Steel NameSteel NumberUpper Yield StrengthTensile StrengthElongationMinimum Average
Reh b min forA minAbsorbed Energy
KV   J
T mmRm% b cat a temperature of ℃ c
T ≤1616<T≤40 lt
MPa *MPa *lt0-100
P195TR1 e1.0107195185320-4402725
P195TR21.0108195185320-44027254028 d27
P235TR1 e1.0254235225360-5002523  
P235TR21.0255235225360-50025234028 d27
P265TR1 e1.0258265255410-5702119
P265TR21.0259265255410-57021194028 d27
a    For wall thickness greater than 40 mm the mechanical properties are subject to agreement.
   See 11.2.
  l = longitudinal; t = transverse.
   Option 5: Additionally,  longitudinal impact strength shall be verified at – 10 °C.
   Tubes made to these material grades are unlikely to support the essential requirements of Directive 97/23/EC unless other criteria are taken into account, see Annex I section 7.5 of this Directive
*    1 MPa = 1 N/mm²

Mechanical Properties of EN 1021-7-1 Pipes

Steel Grades Tensile Properties Impact Properties
Steel Name Steel Number Upper Yield Strength Tensile Strength Elongation Minimum Average Absorbed Energy
At a Temperature of ℃
T≤16 16<T≤40 l t
Mpa Mpa l t 0 -10 0
P195TR1 1.0107 195 185 320-440 27 25
P195TR2 1.0108 195 185 320-440 27 25 40 28 27
P235TR1 1.0254 235 225 360-500 25 23
P235TR2 1.0255 235 225 360-500 25 23 40 28 27
P265TR1 1.0258 265 255 410-570 21 19
P265TR2 1.0259 265 255 410-570 21 19 40 28 27

Tolerance of EN 10217-1 Steel Pipes

- Outside Diameter and Wall Thickness Tolerance on EN 10217-1

Outside Diameter Tolerance on
Outside Diameter Wall Thickness
D D T ≤ 5 5 < T ≤ 40
D ≤ 219.1 ±1% or ±0.5 ±10% or ±0.3 Whichever is the greater ±8% or ±2 Whichever is the greater
Whichever is the greater
D > 219.1 ±0.75% or ±6
Whichever is the greater

- Length Tolerance on EN 10217-1

Length Tolerances on Exact Length for Outside Diameter (D)
L < 406.4 ≥ 406.4
L ≤ 6000 +10, 0 +25, 0
6000 < L ≤ 12000 +15, 0 +50, 0
L > 12000 + by agreement, 0

EN10217 Minimum Thickness Specified


NPS Outside Diameter (mm) Wall Thickness (mm) Tolerances on the Outside Diameter (mm) Mass per Unit of Length (kg/m)
Max. Min.
1” 33.7 2.3 34 33.4 1.78
1.25” 42.4 2.3 42.7 42.1 2.27
1.5” 48.3 2.3 48.6 48 2.61
2” 60.3 2.3 60.6 60 3.29
2.5” 76.1 2.6 76.4 75.8 4.71
3” 88.9 2.9 89.2 88.6 6.15
4” 114.3 3.2 114.6 114 8.77
5” 139.7 3.6 140 139.4 12.1
6” 168.1 4 168.7 167.9 16.21
8” 219.1 5 219.5 218.7 26.4
10’ 273.1 5 275.15 271.05 33.1
12’ 323.9 5.6 326.33 321.47 43.97


NPS Outside Diameter (mm) Minimum Wall Thickness (mm) with Standard Tolerance Tolerances on the Outside Diameter (mm) Mass per Unit of Length (kg/m)
Max. Min.
1” 33.7 2.6 34 33.4 1.99
1.25” 42.4 2.6 42.7 42.1 2.55
1.5” 48.3 2.6 48.6 48 2.93
2” 60.3 2.6 60.6 60 3.7
2.5” 76.1 2.6 76.4 75.8 4.71
3” 88.9 2.9 89.2 88.6 6.15
4” 114.3 3.2 114.6 114 8.77
5” 139.7 3.6 140 139.4 12.1
6” 168.1 4 168.7 167.9 16.21
8” 219.1 4.5 219.5 218.7 23.82
10’ 273.1 5 275.15 271.05 33.1
12’ 323.9 5.6 326.33 321.47 43.97

Marking to be Applied on EN 10217-1 Pipes

Steel tubes EN 10217-1 are used in numerous industries, from construction and infrastructure to chemical processing and oil & gas. In order to ensure that these products are durable and fit for purpose, manufacturers are required to mark their products with certain essential information. This includes the manufacturer’s name or trade mark, the type of tube, the standard number and the steel name or steel number. By law, at least one end of each tube must be marked in this way. This helps to ensure that users can identify the product, check that it is fit for purpose and trace it back to the manufacturer if necessary. As such, it is a vital part of product safety and quality assurance.

For tubes with an outside diameter of over 51mm, the marking on the tube may be replaced by marking on a label or tag which is securely attached to the bundle or box. This label or tag shall also identify the tube diameter, wall thickness and length range. The manufacturer may also include additional markings as needed for identification. This ensures that all tubes can be properly identified and traced back to their manufacturer.

Why choose tuspipe?


Since 1998, Tianjin United Steel Pipe Co., Ltd (TUSPIPE) has been committed to supplying high-quality line pipes.

With over 500,000 tons annual production capacity, the company serves various fields and industries, such as oil & gas exploitation and transmission, ship & auto-building, water & electricity, environmental protection, mechanical engineering, infrastructure construction and etc.

TUSPIPE places a premium on product quality and rigorous product quality control. In order to maintain good product quality,  the company has established a Test & Inspection Center since 2004. With a series of state-of-the-art tests and inspection equipment, the test & inspection center is able to perform the tensile tests, hydro tests, impact tests, DWTT, etc.

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