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EN 10216-2 Seamless Steel Tube

Views: 9     Author: Site Editor     Publish Time: 2025-01-15      Origin: Site

EN10215-2 seamless steel tube applies to seamless steel tubes used under pressure conditions, including non-alloy steel and alloy steel seamless tubes with specified room temperature yield strength and tensile strength. These steel tubes can be used in a variety of applications, such as pressure systems in mechanical engineering, construction engineering, oil and gas industry, and other industrial fields.


EN10216-2 seamless steel tube contain multiple steel grades, common non-alloy steels such as P195GH, P235GH, P265GH, etc., alloy steels such as 13CrMo4-5, 10CrMo9-10, etc. Different steel grades have different chemical compositions and mechanical properties to adapt to various use environments and pressure requirements.


European standard seamless steel tubes are produced using a variety of manufacturing processes such as cold drawing, cold rolling, and hot rolling to ensure that the inner and outer diameter dimensions of the steel tubes are accurate, the surface is smooth, and it has good mechanical properties and corrosion resistance. These steel tubes not only have high strength, good plasticity and toughness, but also can effectively resist the erosion of corrosive media, meeting the engineering requirements under high pressure and high temperature environments.


Photos of EN 10216-2 Seamless steel tubes


EN10216-2 seamless steel tubes


What is seamless steel tubing?


Seamless steel tube is a tube without seams around the perimeter, and the entire tube wall is a continuous integral structure. It is different from seamed tubes (such as welded tubes, which are made by rolling and welding plates and have obvious welds). Seamless tubes do not go through welding processes during the manufacturing process, but directly process solid billets into tubes through perforation, rolling and other processes.


EN10216-2 seamless steel tubes can also be produced with much smaller inner diameters than welded tubes, which makes them a much better choice for high-precision equipment, like high-pressure fuel lines in modern engines. Some examples of seamless tubing in the medical and pharmaceutical industries have capillary-sized inner diameters that are simply unattainable in welded tubes.


What are the two basic types of tubing?


Stainless steel tubing is one of the most versatile metal alloy materials used in manufacturing and fabrication. The two common types of tubing are seamless and welded. Deciding between welded or seamless tubing primarily depends on the application requirements of the product.


Welded Tubing


There is a clear weld, and the surface flatness and glossiness at the weld may be slightly different from other parts of the tube. The quality and appearance of the weld vary depending on the welding process and operation level. Some high-quality welded stainless steel tubes have relatively smooth appearance after fine processing of the weld, but the weld marks can still be distinguished by careful observation.


Seamless Tubing


There is no weld on the surface, the overall surface is smooth and continuous, the wall thickness in the circumferential direction is uniform, and the appearance is more regular and beautiful. Seamless tubes have higher strength, excellent corrosion resistance and the ability to withstand higher pressures than welded tubes. This makes them more suitable for critical applications in harsh environments.


EN 10216-2 Seamless Steel Tube Specification



OD:

10.2mm-720mm

WT:

1.2mm~12mm

Length:

5-12m or as to customer requirement

Application:

Hydraulic system pipeline pipe, pipe for boiler project, construction structure, etc.

Supplementary Technology:

Plain or threaded with socket or beveled with plastic caps, hydraulic testing, eddy current, Infrared test.

Surface:

Painting, oil coating, Anti-corrosion & Insulation.

Delivery state:

Hot Rolled, Cold Drawn.

Steel Grade:

P195GH, P235GH, P265GH, 16Mo3, 14MoV6-3, 13CrMo4-5, 10CrMo9-10.



EN 10216-2 Scope


This Part of EN 10216 specifies the technical delivery conditions in two test categories for seamless tubes of circular cross section, with specified elevated temperature properties, made of non-alloy and alloy steel.


NOTE - This Part of EN 10216 may also be applied for tubes of non-circular cross section; necessary modification should be agreed a the time of enquiry and order.


Symbols


For the purpose of this Part of EN 10216, the symbols given in pr EN 10266 and the following apply.

- d specified inside diameter

- dmin specified minimum inside diameter

- Tmin specified minimum wall thickness

- Dc calculated outside diameter

- dc calculated inside diameter


Lengths


Unless option 12 is specified, the tubes shall be delivered in random length. The delivery length range shall beagreed at the time of enquiry and order.


Option 12: The tubes shall be delivered in exact lengths and the length shall be specified at the time of enquiryand order. For the tolerances see 8.7.4. 2.


EN 10216-2 Chemical Composition:


Steel grades EN10216-2 CHEMICAL COMPOSITION (LADLE ANALYSIS)
C% max Si% max Mn% max P% max S% max Cr% max Mo% max Ni% max Al.cał% min Cu% max Nb% max Ti% max V% max Cr+ Cu+ Mo+ Ni% MAX
P195GH 0.13 0.35 0.7 0.025 0.02 0.3 0.08 0.3 ≥ 0.020 0.3 0.01 0.04 0.02 0.7
P235GH 0.16 0.35 1,20 0.025 0.02 0.3 0.08 0.3 ≥ 0.020 0.3 0.01 0.04 0.02 0.7
P265GH 0.2 0.4 1,40 0.025 0.02 0.3 0.08 0.3 ≥ 0.020 0.3 0.01 0.04 0.02 0.7
16Mo3 0.12- 0.20 0.35 0.40- 0.70 0.025 0.02 0.3 0.25- 0.35 0.3 ≥ 0.020 0.3 - - - -
14MoV6-3 0.10- 0.15 0.15- 0.35 0.40- 0.70 0.025 0.02 0.30- 0.60 0.50- 0.70 0.3 ≥ 0.020 0.3 - 0.22-0.28 - -
13CrMo4-5 0.15 0.50- 1,00 0.30- 0.60 0.025 0.02 1,00- 1,50 0.45- 0.65 0.3 ≥ 0.020 0.3 - - - -
10CrMo9-10 0.10- 0.17 0.35 0.40- 0.70 0.025 0.02 0.70- 1,15 0.40- 0.60 0.3 ≥ 0.020 0.3 - - - -


EN 10216-2 Mechanical Property:


EN 10216-2 Mechanical properties
Steel grades Mechanical properties during tensile testing in room temperature Resilience
Upper yield limit or yield strength Re or R0.2 for wall thickness of t min Tensile strength Rm
Minimum energy average absorbed KVJ at the temperature of 0℃
T≤16 16<t≤40< pan=""> 40<t≤60< pan=""> 60<t≤60< pan=""> Elongation A min% I T
MPa MPa MPa MPa MPa I t 20 0 -10 20 0
P195GH 195 - - - 320- 440 27 25 - 40 28 - 27
P235GH 235 225 215 - 360- 500 25 23 - 40 28 - 27
P265GH 265 255 245 - 410- 570 23 21 - 40 28 - 27
16Mo3 280 270 260 - 450- 600 22 20 40 - - 27 -
14MoV6-3 320 320 310 - 460- 610 20 18 40 - - 27 -
13CrMo4-5 290 290 280 - 440- 590 22 20 40 - - 27 -
10CrMo9-10 280 280 270 - 480- 630 22 20 40 - - 27 -


What is EN 10216-2 material?


The EN 10216-2 standard specifies the requirements for seamless non-alloy and alloy steel tubes for specified elevated temperature conditions. Primarily used in the construction of pressure equipment such as boilers, heat exchangers, and pipelines, By adhering to this standard, manufacturers ensure the interchangeability of their products across different industries and countries, promoting efficiency and safety in the iron and steel sector.


Non-alloy steel tubes: such as P195GH, P235GH, P265GH, etc. These steel tubes are mainly used in equipment that needs to withstand certain pressures and temperatures.


Alloy steel tubes: such as 13CrMo4-5, 10CrMo9-10, etc. Alloy steel tubes usually have higher strength and better corrosion resistance, and are suitable for more demanding working environments.


What is EN 10216-2 equivalent to ASTM material?


         Pipes / Tubes

Material number

EN

ASTM

   Non-alloy 

1.0254 St 37.0

P235TR1

A 53 Grade A

1.0570 St 52-3

S355J2H (1.0576)

1.0305 St 35.8/I

P235GH TC1 (1.0345)

A 106 Grade A

1.0305 St 35.8/III

P235GH TC2 (1.0345)

1.0405 St 45.8/I

P265GH TC1 (1.0425)

A 106 Grade B

1.0405 St 45.8/III

P265GH TC2 (1.0425)

Alloyed heat-resistant

1.5415 15 Mo 3

16Mo3

A 335 Grade P1

1.7335 13 CrMo 4 4

13CrMo4–5

A 335 Grade P12

– –

A 335 Grade P11

1.7380 10 CrMo 9 10

10CrMo9–10

A 335 Grade P22

1.7362 12 CrMo 19 5

X11CrMo5

A 335 Grade P5

– –

A 335 Grade P9

1.4903 –

X10CrMoVNb9–1

A 335 Grade P91


EN 10216-2 Seamless Steel Tube Dimension


Tolerances on outside diameter and wall thicknes


Outside Diameter D mm

Tolerances on

Tolerances on T for a T/D ratio

D



≤ 0,025

> 0,025

> 0,050

> 0,10

≤ 0,050

≤ 0,10

D ≤ 219,1

± 1% or ± 0.5mm  

± 12,5% or ± 0.4mm whichever is the greater

D > 219,1

whichever is the greater

± 20%

± 15%

± 12,5%

± 10% a

a For outside diameters D ≥ 355,6 mm it is permitted to exceed the upper wall thickness locally by a further 5% of the wall thickness T

 
Tolerances on inside diameter and wall thickness


Tolerances on inside diameter

Tolerances on T for a T/d ratio

d

d min

≤ 0,03

> 0,03

> 0,06

> 0,12

≤ 0,06

≤ 0,12

± 1% or ± 2 mm whichever is the greater

(+ 2% ,0)or (+ 4 mm,0)

whichever is the greater

± 20%

± 15%

± 12,5%

± 10% a

a For outside diameters D ≥ 355,6 mm it is permitted to exceed the upper wall thickness locally by a further 5% of the wall thickness T

 
Tolerances on outside diameter and minimum wall thickness


Outside diameter D mm

Tolerances on D

Tolerances on T min for a T min /D ratio

≤ 0,02

> 0,02

> 0,04

> 0,09

≤ 0,04

≤ 0,09

D ≤ 219,1

± 1% or ± 0.5mm

(+ 28%,0) or (+ 0.8 mm,0) whichever is the greater

D > 219,1

whichever is the greater

50%

35%

28%

+ 22% a


0

0

0

0

a For outside diameters D ≥ 355,6 mm it is permitted to exceed the upper wall thickness locally by a further 5% of the wall thickness T

 
Tolerances on inside diameter and minimum wall thickness


Tolerances

Tolerances on T min for a

on inside diameter

T min /d ratio

d

d min

≤ 0,05

> 0,05

> 0,1

≤ 0,1

± 1% or ± 2 mm

(+2%,0) or (+ 4 mm,0) whichever is the greater

35%

28%

+ 22% a

whichever is the greater

0

0

0

a For outside diameters D ≥ 355,6 mm it is permitted to exceed the upper wall thickness locally by a further 5% of the wall thickness T

 

Tolerances on exact lengths


Dimension in mm


Length L

Tolerance on exact length

L ≤ 6000

10

0

6000 < L ≤ 12 000

15

0

L > 12 000

+ by agreement

0


What is seamless steel tube used for?


Construction industry: In building structures, seamless steel tubes can be used as structural support components. For example, in the steel structure frames of some large venues and industrial plants, seamless steel tubes are used as columns and beams, which can withstand large loads and ensure the stability of the building structure.


Machinery manufacturing: There is a wide demand for EN10216-2 seamless steel tube in the machinery manufacturing field. In automobile manufacturing, seamless steel tubes are used to manufacture automobile drive shafts, hydraulic system tubes and other components.


Petrochemical: The production environment of the petroleum and chemical industries is usually harsh, and the requirements for tubes are very high. Seamless tubes are used for oil well tubes in oil extraction and need to withstand high pressure, high temperature and erosion of corrosive media underground.


Energy and power: In thermal power plants, EN10216-2 seamless steel tubes are the main material for high-temperature and high-pressure tubes. For example, the main steam tube needs to transport the steam generated by the boiler to the turbine under high temperature (up to 500℃) and high pressure (up to tens of MPa). Seamless tubes can ensure safety and reliability during long-term operation with their good high-temperature strength and durability.


Aerospace: The aerospace field has extremely high performance requirements for materials, and seamless steel tubes are also used in this field.


Testings


(1) Chemical analysis
(2) Tensile test(Tensile test at room temperature, Tensile test at elevated temperature)
(3) Flattening test
(4) Ring tensile test
(5) Drift expanding test
(6) Ring expanding test
(7) Impact test
(8) Leak tightness test(Hydrostatic test,  Electromagnetic test)
(9) Dimensional inspection
(10) Visual examination
(11) Non-destructive testing


Options


1) Cold finishing.
2) Restriction on copper and tin content.
3) Product analysis.
4) Impact testing .
5) Longitudinal impact testing at -10&deg; C for non-alloy steel grades.
6) Tensile testing at elevated temperature .
7) Selection of leak-tightness test method .
8) Non-Destructive Testing for test category 2 tubes for detection of transverse imperfections.
9) Non-Destructive Testing for test category 2 tubes for detection of laminar imperfections .
10) Special ends preparation.
11) Set of dimensions other than D and T.
12) Exact lengths ).
13) The type of inspection document other than the standard document.
14) Test pressure for hydrostatic leak-tightness test .
15) Wall thickness measurement away from the ends .
16) Non-Destructive Testing method.
17) Additional marking .
18) Protection .


You can get an offer for products in below material forms:


-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249)

-Fitting and Flange (ASTM A182)

-Round bar ,Billet (ASTM A276, ASTM A479)

- Plate, Sheet, Strip(ASTM A240, EN 10028-7,A480)

-Bolting, Nuts(ASTM A193, A194)





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