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Introduction
EN 10217
is a European standard series covering welded circular steel tubes intended for
pressure purposes. The series is divided into seven parts, with individual
parts specifying requirements according to temperature, material type, welding
process and service conditions.
The EN
10217 series covers non-alloy steel tubes with specified room-temperature
properties, non-alloy and alloy steel tubes with elevated-temperature
properties, alloy fine grain steel tubes, low-temperature pressure tubes,
submerged-arc welded tubes and stainless steel pressure tubes.
Ladhani
Metal Corporation supplies EN 10217 welded steel tubes in required grades,
dimensions, wall thicknesses, lengths, manufacturing processes and delivery
conditions.
EN 10217 Parts Covered
- EN 10217-1 – Non-Alloy Steel Tubes
with Specified Room Temperature Properties
- EN 10217-2 – Electric Welded
Non-Alloy and Alloy Steel Tubes with Specified Elevated Temperature
Properties
- EN 10217-3 – Alloy Fine Grain Steel
Tubes
- EN 10217-4 – Electric Welded
Non-Alloy Steel Tubes with Specified Low Temperature Properties
- EN 10217-5 – Submerged Arc Welded
Non-Alloy and Alloy Steel Tubes with Specified Elevated Temperature
Properties
- EN 10217-6 – Submerged Arc Welded
Non-Alloy Steel Tubes with Specified Low Temperature Properties
EN 10217-1 – Non-Alloy Steel Tubes with
Specified Room Temperature Properties
EN
10217-1 specifies technical delivery conditions for welded circular tubes
manufactured from non-alloy steel and having specified room-temperature
properties.
The
standard includes TR1 and TR2 quality levels. TR2 grades have additional
requirements relating to chemical composition, impact properties and
inspection. The standard covers electric welded and submerged-arc welded tube
manufacturing routes.
Grades Covered
P195TR1 |
P195TR2 | P235TR1 | P235TR2 | P265TR1 | P265TR2
Chemical Composition
Chemical
composition values below are cast-analysis limits in % by mass.
|
Grade |
C Max. % |
Si Max. % |
Mn Max. % |
P Max. % |
S Max. % |
Cr Max. % |
Mo Max. % |
Ni Max. % |
Cu Max. % |
|
P195TR1 |
0.13 |
0.35 |
0.70 |
0.025 |
0.020 |
0.30 |
0.08 |
0.30 |
0.30 |
|
P195TR2 |
0.13 |
0.35 |
0.70 |
0.025 |
0.015 |
0.30 |
0.08 |
0.30 |
0.30 |
|
P235TR1 |
0.16 |
0.35 |
1.20 |
0.025 |
0.020 |
0.30 |
0.08 |
0.30 |
0.30 |
|
P235TR2 |
0.16 |
0.35 |
1.20 |
0.025 |
0.015 |
0.30 |
0.08 |
0.30 |
0.30 |
|
P265TR1 |
0.20 |
0.40 |
1.40 |
0.025 |
0.020 |
0.30 |
0.08 |
0.30 |
0.30 |
|
P265TR2 |
0.20 |
0.40 |
1.40 |
0.025 |
0.015 |
0.30 |
0.08 |
0.30 |
0.30 |
For TR2
grades, total aluminium is specified at a minimum of 0.020%. Nb, Ti and V are
also controlled, with the standard specifying limits for these elements. The
combined Cr + Cu + Mo + Ni content is limited to 0.70%.
EN 10217-2 – Electric Welded Non-Alloy and
Alloy Steel Tubes with Specified Elevated Temperature Properties
EN
10217-2 covers electric welded tubes manufactured from non-alloy and alloy
steels with specified elevated-temperature properties.
The
standard includes P195GH, P235GH, P265GH and 16Mo3. P195GH, P235GH and P265GH
are non-alloy quality steels, while 16Mo3 is an alloy special steel.
Grades Covered
P195GH |
P235GH | P265GH | 16Mo3
Chemical Composition
|
Grade |
C % |
Si Max. % |
Mn % |
P Max. % |
S Max. % |
Cr Max. % |
Mo % |
Ni Max. % |
Cu Max. % |
|
P195GH |
0.13 Max. |
0.35 |
0.70 Max. |
0.025 |
0.020 |
0.30 |
0.08 Max. |
0.30 |
0.30 |
|
P235GH |
0.16 Max. |
0.35 |
1.20 Max. |
0.025 |
0.020 |
0.30 |
0.08 Max. |
0.30 |
0.30 |
|
P265GH |
0.20 Max. |
0.40 |
1.40 Max. |
0.025 |
0.020 |
0.30 |
0.08 Max. |
0.30 |
0.30 |
|
16Mo3 |
0.12–0.20 |
0.35 |
0.40–0.90 |
0.025 |
0.020 |
0.30 |
0.25–0.35 |
0.30 |
0.30 |
For the
GH grades, aluminium and microalloying elements are controlled according to the
standard. For 16Mo3, molybdenum is the principal alloying addition, providing
improved elevated-temperature strength.
EN 10217-3 – Alloy Fine Grain Steel Tubes
EN
10217-3 specifies welded alloy fine grain steel tubes for pressure purposes.
The standard covers four quality categories: basic N grades,
elevated-temperature NH grades, low-temperature NL1 grades and special
low-temperature NL2 grades.
Grades Covered
P275NL1 |
P275NL2 | P355N | P355NH | P355NL1 | P355NL2 | P460N | P460NH | P460NL1 |
P460NL2
Chemical Composition
Representative
cast-analysis limits are shown below.
|
Grade |
C Max. % |
Si Max. % |
Mn % |
P Max. % |
S Max. % |
Cr Max. % |
Mo Max. % |
Ni Max. % |
Al Min. % |
|
P275NL1 |
0.16 |
0.40 |
0.50–1.50 |
0.025 |
0.020 |
0.30 |
0.08 |
0.50 |
0.020 |
|
P275NL2 |
0.16 |
0.40 |
0.50–1.50 |
0.025 |
0.015 |
0.30 |
0.08 |
0.50 |
0.020 |
|
P355N |
0.20 |
0.50 |
0.90–1.70 |
0.025 |
0.020 |
0.30 |
0.08 |
0.50 |
0.020 |
|
P355NH |
0.20 |
0.50 |
0.90–1.70 |
0.025 |
0.020 |
0.30 |
0.08 |
0.50 |
0.020 |
|
P355NL1 |
0.18 |
0.50 |
0.90–1.70 |
0.025 |
0.020 |
0.30 |
0.08 |
0.50 |
0.020 |
|
P355NL2 |
0.18 |
0.50 |
0.90–1.70 |
0.025 |
0.015 |
0.30 |
0.08 |
0.50 |
0.020 |
|
P460N |
0.20 |
0.60 |
1.00–1.70 |
0.025 |
0.020 |
0.30 |
0.10 |
0.80 |
0.020 |
|
P460NH |
0.20 |
0.60 |
1.00–1.70 |
0.025 |
0.020 |
0.30 |
0.10 |
0.80 |
0.020 |
|
P460NL1 |
0.20 |
0.60 |
1.00–1.70 |
0.025 |
0.020 |
0.30 |
0.10 |
0.80 |
0.020 |
|
P460NL2 |
0.20 |
0.60 |
1.00–1.70 |
0.025 |
0.015 |
0.30 |
0.10 |
0.80 |
0.020 |
Other
controlled elements include Cu, Nb, Ti and V. For applicable grades, the
combined Nb + Ti + V content is also controlled.
EN 10217-4 – Electric Welded Non-Alloy Steel
Tubes with Specified Low-Temperature Properties
EN
10217-4 specifies electric welded non-alloy steel tubes for pressure purposes
where specified low-temperature properties are required.
Grades Covered
P215NL |
P265NL
Chemical Composition
|
Grade |
C Max. % |
Si Max. % |
Mn % |
P Max. % |
S Max. % |
Cr Max. % |
Mo Max. % |
Ni Max. % |
Al Min. % |
|
P215NL |
0.15 |
0.35 |
0.40–1.20 |
0.025 |
0.020 |
0.30 |
0.08 |
0.30 |
0.020 |
|
P265NL |
0.20 |
0.40 |
0.60–1.40 |
0.025 |
0.020 |
0.30 |
0.08 |
0.30 |
0.020 |
Copper is
limited to 0.30% maximum, while Nb, Ti and V are controlled at low levels. The
standard also specifies requirements relating to nitrogen binding and
aluminium.
EN 10217-5 – Submerged Arc Welded Non-Alloy
and Alloy Steel Tubes with Specified Elevated Temperature Properties
EN
10217-5 covers submerged-arc welded tubes with specified elevated-temperature
properties. It includes longitudinally welded and helically welded SAW tubes.
Grades Covered
P235GH |
P265GH | 16Mo3
The
standard classifies P235GH and P265GH as non-alloy quality steels and 16Mo3 as
an alloy special steel.
Chemical Composition
|
Grade |
C % |
Si Max. % |
Mn % |
P Max. % |
S Max. % |
Cr Max. % |
Mo % |
Ni Max. % |
Cu Max. % |
|
P235GH |
0.16 Max. |
0.35 |
0.60–1.20 |
0.025 |
0.020 |
0.30 |
0.08 Max. |
0.30 |
0.30 |
|
P265GH |
0.20 Max. |
0.40 |
0.80–1.40 |
0.025 |
0.020 |
0.30 |
0.08 Max. |
0.30 |
0.30 |
|
16Mo3 |
0.12–0.20 |
0.35 |
0.40–0.90 |
0.025 |
0.020 |
0.30 |
0.25–0.35 |
0.30 |
0.30 |
For
P235GH and P265GH, total aluminium is specified at a minimum of 0.020%. 16Mo3
contains approximately 0.25–0.35% Mo, providing its elevated-temperature alloy
characteristics.
EN 10217-6 – Submerged Arc Welded Non-Alloy
Steel Tubes with Specified Low-Temperature Properties
EN
10217-6 specifies submerged-arc welded non-alloy steel tubes with specified
low-temperature properties.
The tubes
are manufactured by SAW processes, including longitudinal and helical
submerged-arc welding routes.
Grades Covered
P215NL |
P265NL
Chemical Composition
|
Grade |
C Max. % |
Si Max. % |
Mn % |
P Max. % |
S Max. % |
Cr Max. % |
Mo Max. % |
Ni Max. % |
Al Min. % |
|
P215NL |
0.15 |
0.35 |
0.40–1.20 |
0.025 |
0.020 |
0.30 |
0.08 |
0.30 |
0.020 |
|
P265NL |
0.20 |
0.40 |
0.60–1.40 |
0.025 |
0.020 |
0.30 |
0.08 |
0.30 |
0.020 |
Cu is
limited to 0.30% maximum, with Nb, Ti and V controlled according to the
standard.
Forms of Supply
EN 10217
welded tubes can be supplied in different configurations depending on the
applicable part, manufacturing process and grade.
- Electric Welded Tubes
- High Frequency Welded Tubes
- Submerged Arc Welded Tubes
- Longitudinally Welded Tubes
- Helically Welded Tubes
- SAWL Tubes
- SAWH Tubes
- Pressure Tubes
- Boiler Tubes
- Heat Exchanger Tubes
- Process Tubes
- Stainless Steel Welded Tubes
- Duplex Stainless Steel Tubes
- Low-Temperature Tubes
- Elevated-Temperature Tubes
- Cut-to-Length Tubes
- Custom Size Welded Tubes
Mechanical Properties
The
mechanical properties of EN 10217 tubes depend on the applicable part, grade,
wall thickness, delivery condition and quality category.
Typical
yield-strength levels range from approximately 195 MPa for P195 grades to 460
MPa for P460 grades, while stainless and duplex grades have different strength
requirements based on their material families.
For
example, EN 10217-1 specifies minimum yield strengths of 195 MPa, 235 MPa and
265 MPa for the corresponding TR1 grades at smaller wall thicknesses.
EN
10217-4 specifies P215NL and P265NL with minimum yield strengths of 215 MPa and
265 MPa respectively.
Low-Temperature Properties
The
low-temperature sections of EN 10217 include specific grades designed for
pressure service where toughness at reduced temperatures is important.
EN
10217-4 and EN 10217-6 cover P215NL and P265NL grades with specified impact
properties at temperatures down to −40 °C.
EN
10217-3 also includes NL1 and NL2 grade designations, with NL2 grades providing
more demanding low-temperature toughness requirements.
Elevated Temperature Properties
EN
10217-2, EN 10217-3 and EN 10217-5 include grades intended for
elevated-temperature pressure service.
EN
10217-2 includes P195GH, P235GH, P265GH and 16Mo3, while EN 10217-5 covers
P235GH, P265GH and 16Mo3. Elevated-temperature proof-strength values are
specified for applicable grades.
Welding Processes
Depending
on the applicable part, EN 10217 welded tubes can be manufactured using:
- Electric Welding
- High Frequency Welding
- Submerged Arc Welding
- Longitudinal Submerged Arc Welding
- Helical Submerged Arc Welding
EN
10217-5 and EN 10217-6 specifically cover submerged-arc welded tubes, including
SAWL and SAWH configurations.
Surface Finish
EN 10217
welded tubes may be supplied with different surface conditions according to the
material, manufacturing process and purchaser requirements.
- As-Welded Surface
- Hot Finished Surface where
applicable
- Cold Finished Surface where
applicable
- Pickled Surface
- Descaled Surface
- Bright Surface
- Machined Surface where specified
The tube
surface and weld area should meet the requirements of the applicable part of
the standard.
Dimensions and Sizes
EN 10217
tubes are manufactured in a broad range of outside diameters and wall
thicknesses.
- Outside Diameter: As specified by
order
- Wall Thickness: As specified by
grade and dimensional requirements
- Length: Random or fixed lengths
- End Finish: Plain Ends or specified
end preparation
- Welding Type: EW, HFW, SAWL or SAWH
according to applicable part
- Custom Dimensions: Available
subject to manufacturing capability
Dimensional
tolerances depend on the applicable EN 10217 part and ordered tube dimensions.
Key Features
- Welded construction
- Wide range of pressure grades
- Non-alloy and alloy steel options
- Stainless steel options
- Duplex stainless steel options
- Room-temperature pressure grades
- Elevated-temperature pressure
grades
- Low-temperature pressure grades
- Fine grain steel grades
- Good weldability
- Controlled chemical composition
- Wide range of mechanical properties
- Suitable for pressure equipment
- Suitable for industrial piping
systems
Applications
Power Generation
- Boiler piping
- Steam piping
- Superheater systems
- Heat recovery systems
- Power plant pressure piping
- High-temperature process systems
Oil and Gas Industry
- Process piping
- Pressure pipelines
- Gas processing systems
- Refinery piping
- Hydrocarbon processing
- Oil and gas pressure systems
Chemical and Petrochemical Industry
- Process piping
- Heat exchangers
- Pressure equipment
- Chemical processing systems
- Petrochemical piping
- Corrosion-resistant process lines
Pressure Equipment
- Pressure vessels
- Boiler systems
- Storage equipment
- Process vessels
- Pressure piping
- Industrial pressure systems
Low-Temperature Applications
- Cold-service piping
- Low-temperature process systems
- Refrigeration equipment
- Gas processing systems
- Cold storage systems
- Low-temperature pressure equipment
Stainless Steel Applications
- Chemical processing
- Food processing
- Pharmaceutical equipment
- Heat exchangers
- Corrosive process piping
- Water treatment
- Offshore equipment
- Marine applications
Fabrication and Welding
EN 10217
welded tubes can be cut, formed, bent, machined and welded using suitable
procedures according to the applicable material grade.
Welding
parameters should be selected according to the steel grade, wall thickness,
manufacturing route, carbon equivalent, preheating requirements and applicable
fabrication code.
Stainless
and duplex stainless steel grades require appropriate control of welding heat
input and interpass temperature to maintain corrosion resistance and mechanical
properties.
Heat Treatment
Heat treatment
requirements vary according to the individual EN 10217 part and steel grade.
Depending
on the grade, tubes may be supplied in normalized, normalized-rolled,
stress-relieved, solution-annealed, quenched and tempered or other specified
delivery conditions.
For
stainless steel grades covered by EN 10217-7, solution heat treatment and
appropriate cooling conditions are specified according to the individual
material grade.
Testing and Inspection
EN 10217
tubes may be subjected to specified inspection and testing requirements,
including:
- Chemical Analysis
- Tensile Testing
- Impact Testing
- Dimensional Inspection
- Visual Examination
- Leak-Tightness Testing
- Weld Seam Inspection
- Flattening Testing
- Bend Testing where specified
- Drift Expansion Testing where
specified
- Non-Destructive Testing
- Ultrasonic Testing where specified
- Eddy Current Testing where
applicable
- Material Identification
- Heat Number Traceability
The exact
inspection requirements depend on the EN 10217 part, grade, test category and
purchaser requirements.
Advantages
- Reliable welded construction
- Wide range of steel grades
- Suitable for pressure applications
- Excellent availability of carbon
steel grades
- Alloy steel options for elevated
temperatures
- Fine grain grades for demanding
applications
- Low-temperature grades available
- Stainless steel grades for
corrosion resistance
- Duplex grades for demanding
corrosive environments
- Suitable for longitudinal and
helical welded configurations
- Good weldability
- Controlled mechanical properties
- Wide range of dimensional options
Conclusion
EN 10217
is a comprehensive European standard series for welded steel tubes intended for
pressure purposes. The series covers room-temperature, elevated-temperature and
low-temperature applications, as well as alloy fine grain steels, submerged-arc
welded tubes and stainless steel pressure tubes.
EN
10217-1 covers P195TR1/TR2, P235TR1/TR2 and P265TR1/TR2 grades. EN 10217-2
covers P195GH, P235GH, P265GH and 16Mo3. EN 10217-3 covers P275, P355 and P460
fine grain pressure grades. EN 10217-4 and EN 10217-6 cover P215NL and P265NL
low-temperature grades.
Ladhani Metal Corporation
supplies EN 10217 welded steel tubes in required grades, dimensions, wall
thicknesses, lengths, welding processes and delivery conditions for pressure,
industrial, power-generation, chemical, petrochemical, oil and gas and other
demanding applications.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
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