• No.101 Wanbo 1st Road, Nancun Town, Panyu District, Guangzhou, Guangdong, China
  • 0086-020-84886013，84886093，84886091，84886012
  • sales@finegosteel.com
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Welded Steel Pipe

EN 10219 Steel Pipe

Size: Out diameter:21mm-610mm; Wall thickness:2mm-16mm

Application: Civil engineering, bridge engineering, water engineering

Ends: Plain end/Beveled, protected by plastic caps on both ends, grooved, threaded and coupling, etc.

Surface: Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirement

Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.

Grade: S235JRH, S275JOH, S275J2H, S355JOH, S355J2H, S355K2H


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Standard

Specification

This part of this European Standard specifies technical delivery conditions for hot finished hollow sections of circular, square, rectangular or elliptical forms and applies to hollow sections formed hot, with or without subsequent heat treatment, or formed cold with subsequent heat treatment to obtain equivalent metallurgical conditions to those obtained in the hot formed product.


EN 10219: Cold formed welded structural hollow sections of non-alloy and fine grain steels.


Material

Min Yield Strength
(N/mm2)

Tensile Strength (N/mm2)

Min. Elongation (%)

Thickness in mm

t<16

16>t<40

t<3

3>t<40

t<40

S235JRH

235

225

360-510

340-470

24

S275J0H

275

265

430-580

410-560

20

S275J2H

275

265

430-580

410-560

20

S355J0H

355

345

510-680

490-630

20

S355J2H

355

345

510-680

490-630

20


Manufacturing Tolerances:

Characteristic

Round Hollow Sections

Square and Rectangular Hollow Sections

Outside Dimension

± 1% with min ± 0.5mm and max ± 10mm

± 1% with min of ± 0.5mm

Thickness (T)

T≤5mm: ±10%

T≤5mm: ±10%

T>5mm: ± 0.5mm

T>5mm: ± 0.5mm

Out-of-Roundness

2%

-

Convexity

-

Max .8% with min 0.5mm

Squareness of side

-

90° ± 1°

External Corner Profile

-

T≤6mm: 1.6T to 2.4T

-

6

-

T,10: 2.4T to 3.6T

Twist

-

2mm plus 0.5mm/m

Straightness

0.2% of total

0.15% of total

Mass

±6% on individual length


Weldablity of EN 10219 Pipe:

Weldable steels are specified in this European standard. EN 1011-1 and EN 1011-2 specify the main standards for welding products under this European standard.

When welding these products, the greatest danger is the development of cold cracking in the welded zone as the product thickness, strength level, and CEV rise. Cold cracking is a result of a combination of the following factors:

elevated diffusible hydrogen levels in the weld metal;

a brittle structure in the heat-affected zone;

and large tensile stress concentrations in the welded joint.


Chemical Composition:

Steel Grade

Ytpe of De-oxidation a

% by Mass, Maximum

Steel Name

Steel Number

C

Si

Mn

P

S

N b

S235JRH

1.0039

FF

0.17

–

1.40

0.040

0.040

0.009

S275J0H

1.0149

FF

0.20

–

1.50

0.035

0.035

0.009

S275J2H

1.0138

FF

0.20

–

1.50

0.030

0.030

–

S355J0H

1.0547

FF

0.22

0.55

1.60

0.035

0.035

0.009

S355J2H

1.0576

FF

0.22

0.55

1.60

0.030

0.030

–

S355K2H

1.0512

FF

0.22

0.55

1.60

0.030

0.030

–

A.The deoxidation method is designated as follws:
FF: Fully killed steel containing nitrogen binding elements in amounts sufficient to bind available nitorgen (e.g. min. 0.020% total Al or 0.015% shluble Al).

B.The maximum value for nitrogen dose not apply if the chemical composition shows a minimum total Al content of 0.020% with a minimum Al/N ratio of 2:1, or if sufficient other -binding elements are present. The N-binding elements shall be reocrded in the Inspection Document.


Mechanical Properties:

Steel Grade

Minimum Yield
Strength ReH
MPa

Tensile Strength Rm
MPa

Minimum elongation
Ad
%

Minimum Impact
Energy KVe
J

Steel
Name

Steel
Number

Specified Thickness
mm

Specified Thickness
mm

Specified Thickness
mm

at Test Temperature of

≤16

> 16 ≤ 40

<3

≥3 ≤40

≤40

-20℃

0℃

20℃

S235JRH a

1.0039

235

225

360-510

360-510

24 b

–

–

27

S275J0H a

1.0149

275

265

430-580

410-560

20 c

–

27

–

S275J2H

1.0138

27

–

–

S355J0H a

1.0547

355

345

510-680

470-630

20 c

–

27

–

S355J2H

1.0576

–

–

–

S355K2H

1.0512

40 f

–

–

The impact properties are verified only when Option 1.3 is specified

For thicknesses > 3 mm and section sizes D/T < 15 (round) and (B+H)/2T < 12.5 (square and rectangular) the minimum elongation is by 2. For thicknesses ＞ 3 mm the minimum value for elongation is 17 %.

For section size D/T < 15 (circular) and (B+H)/2T < 12.5 (square and rectangular) and minimum elongation is reduced by 2.

For thicknesses < 3 mm see 9.2.2.

For impact properties for reduced section test pieces see 6.7.2

This value corresponds to 27J at -30℃ (see EN 1993-1-1).

Process

The steel for welded pipe shall be made by one or more of the following processes: open-hearth, electric furnace, or basic-oxygen. Structural Hollow Sections shall be manufactured by electric welding or submerged arc welding without subsequent heat treatment.

Packing

  • Loose + groove protector + two nylon slings + cross steel frame

    Loose + groove protector + two nylon slings + cross steel frame

  • Loose + groove protector + two nylon slings + cross steel frame

    Loose + groove protector + two nylon slings + cross steel frame

  • Loose + two nylon slings + cross steel frame

    Loose + two nylon slings + cross steel frame

  • OD 219mm and above (Loose) Loose + pipe cap + two nylon slings

    OD 219mm and above (Loose) Loose + pipe cap + two nylon slings

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  • No.101 Wanbo 1st Road, Nancun Town, Panyu District, Guangzhou, Guangdong, China
  • 0086-020-84886013，84886093，84886091，84886012
  • sales@finegosteel.com
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