About Us
Eastern Steel Manufacturing Co.,Ltd is a leading manufacturer and distributor of seamless steel pipe, welded steel pipe, OCTG products and fittings. We supply first-step processing, semi-finished parts and finished parts to help our clients meet fabrication requirements beyond their capacity or to improve operations by moving forward the pre-production processing.
News
In this column you can find the steel pipe related articles you need, including industry trends, product standards and materials, and some technical guidelines.
Services
Eastern Steel Manufacturing Co.,Ltd not only improve product production and sales services, but also provide additional value-added services. As long as you need, we can complete your specific needs together.
Facility
Eastern Steel Manufacturing Co.,Ltd not only improve product production and sales services, but also provide additional value-added services. As long as you need, we can complete your specific needs together.
Projects
Many years of large-scale project experience in various fields（Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical etc.）, professional project team is responsible from receiving until the end of the project.
DIN is the German standardization body for piping systems and equipment. Pipes of the DIN 2448 standard are manufactured in accordance with all standards including ASME, ASTM, AISI, DIN, EN, GB, IS, and JIS. Pipes and tubing of this standard can be seamless, welded, machined, ERW, EFW, U-bends, hollow, etc.
The DIN 2448 standard specifies the manufacturing specifications for these pipes and tubing, including dimensions, standard mass per unit length, fittings, and weight. DIN 2448 pipes possess excellent strength and mechanical properties, and exhibit high resistance to reducing acids and various types of corrosion.
Applicable to seamless steel pipe conforming to the technical conditions specified in DIN 1629 (Parts 1-4), DIN 17172, and DIN 17175.
It specifies the outer diameter, wall thickness, and mass per unit length of the steel pipe, aiming to promote standardized selection of pipe diameter.
Not applicable to precision tube (precision tubes are applicable to steel tubes conforming to DIN 2391).
DIN 2448 standard mainly specifies the dimensions and mass per unit length of steel tubes. Specific materials require reference to other relevant standards, such as:
St 37 (Ordinary carbon structural steel, similar to Chinese Q235),
St 44 (Strength slightly higher than St37),
St 52 (High-strength low-alloy steel, similar to Chinese Q345).
St35.8, St45.8 (Steel for boiler tubes and high-temperature, high-pressure pipelines).
Q195, Q215, Q235, Q345 (Materials corresponding to Chinese standards), 20G (Seamless steel tube material for Chinese boiler tubes).
|
Types |
Grades |
Upper yield limit Re min for wall thickness in mm min |
Tensile strength Rm MPa |
Elongation A% min |
|||
|
ROUND SEAMLESS CS PIPES FOR SPECIAL
REQUIREMENTS |
16 |
16 40 |
40 65 |
1 |
t |
||
|
DIN 2448 St37.0 |
235 |
225 |
215 |
350-480 |
25 |
23 |
|
|
DIN 2448 St44.0 |
275 |
265 |
255 |
420-550 |
21 |
19 |
|
|
DIN 2448 St 52 |
355 |
345 |
335 |
50-650 |
21 |
19 |
|
|
Steel grades |
Weld deoxidation type ( semi-killed steel only) RR special killed |
C% |
P% |
S% |
N% |
|
St37.0 |
R |
0,17 |
0,040 |
0,040 |
0,009 |
|
St44.0 |
R |
0,21 |
0,040 |
0,040 |
0,009 |
|
St52.0 |
RR |
0,22 |
0,040 |
0,035 |
- |
|
Standards |
DIN 2448 Seamless Pipe |
|
DIN 2448 Seamless Pipe Size |
4 to 219mm W. T.: 0.5 to 20mm |
|
DIN 2448 Welded Pipe Size |
5.0 mm – 1219.2 mm |
|
DIN 2448 EFW Pipe Size |
5.0 mm – 1219.2 mm |
|
DIN 2448 Tube Swg & Bwg |
10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg. |
|
DIN 2448 Pipe Schedule |
SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
|
DIN 2448 Seamless Tube Size |
3.35 mm OD To 101.6 mm OD |
|
DIN 2448 Welded Tube Size |
6.35 mm OD To 152 mm OD |
|
Swg & Bwg |
10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg. |
|
DIN 2448 Tube Wall Thickness |
0.020" –0.220", (Special Wall Thicknesses Available) |
|
Length |
Single Random, Double Random, Standard & Cut Length Pipe & Tube |
|
Finish |
Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF |
|
Form |
Round, Hydraulic, ‘U’ Bent or Hollow, LSAW, Boiler, Straight Pipe, Clad Pipe, Rectangular Tube And Square Tube Etc |
|
Type |
Welded, Seamless, ERW, EFW, Fabricated Pipe, ‘U’ bent or Hollow, Hydraulic, LSAW, Boiler, Straight Tube, Tube Coil, Round, Rectangular, Square Tube etc |
|
End |
Plain End, Beveled End, Treaded Pipe & Tube |
|
Marking |
All DIN 2448 Seamless Pipe are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. |
|
Application |
Oil Pipe & Tube, Gas Pipe & Tube, Fluid Pipe & Tube, Boiler Tube & Pipe, Heat Exchanger Tube |
|
Value Added Service |
Draw & Expansion as per Required Size & Length, Polish (Electro & Commercial) Annealed & Pickled Ben DIN, Machining Etc. |
|
Test Certificate |
Manufacturer Test Certificate |
|
1/8" IPS(0.405" O.D.) |
3 1/2" IPS( 4.000" O.D.) |
|
SCH 40, 80 |
SCH 10, 40, 80, 160, XXH |
|
1/4" IPS(0.540" O.D.) |
4" IPS(4.500" O.D.) |
|
SCH 10, 40, 80 |
SCH 10, 40, 80, 160, XXH |
|
3/8" IPS(0.675" O.D.) |
5" IPS( 5.563" O.D.) |
|
SCH 10, 40, 80 |
SCH 10, 40, 80, 160, XXH |
|
1/2" IPS(0.840" O.D.) |
6" IPS(6.625" O.D.) |
|
SCH 5, 10, 40, 80, 160, XXH |
SCH 5, 10, 40, 80, 120, 160, XXH |
|
3/4" IPS(1.050" O.D.) |
8 ” IPS(8.625" O.D.) |
|
SCH 10, 40, 80, 160, XXH |
SCH 5, 10, 40, 80, 120, 160, XXH |
|
1" IPS:(1.315′ O.D.) |
10" IPS(10.750" O.D.) |
|
SCH 5, 10, 40, 80, 160, XXH |
SCH 10, 20, 40, 80 |
|
1-1/4" IPS(1.660" O.D.) |
12" IPS(12.750" O.D.) |
|
SCH 10, 40, 80, 160, XXH |
SCH 10, 20, 40, SCH80 |
|
1-1/2" IPS(1.900" O.D.) |
14" IPS(14.000" O.D.) |
|
SCH 10, 40, 80, 160, XXH |
SCH10, SCH40 |
|
2" IPS(2.375" O.D.) |
16" IPS(16.000" O.D.) |
|
SCH 10, 40, 80, 160, XXH |
SCH10, SCH40 |
|
2 1/2" IPS(2.875" O.D.) |
18" IPS (18.000" O.D.) |
|
SCH 10, 40, 80, 160, XXH |
SCH40 |
|
3" IPS( 3.500" O.D.) |
|
|
SCH 5, 10, 40, 80, 160, XXH |
|
Specification |
O/D x W/T ( mm ) |
Weight (kg/m ) |
|
3/8” x STD SCH40 |
17.1 X 2.31 |
0.85 |
|
1/2” x STD SCH40 |
21.3 X 2.77 |
1.27 |
|
3/4” x STD SCH40 |
26.7 X 2.87 |
1.68 |
|
1” x SCH 40 (STD) |
33.4 X 3.38 |
2.50 |
|
1” x SCH 80 (XS) |
33.4 X 4.55 |
3.23 |
|
1-1/2” x SCH 40 (STD) |
48.3 X 3.68 |
4.05 |
|
2” x SCH 40 (STD) |
60.3 X 3.91 |
5.44 |
|
2” x SCH 80 (XS) |
60.3 X 5.54 |
7.48 |
|
2” x SCH 160 |
60.3 X 8.74 |
11.11 |
|
3” x SCH 40 (STD) |
88.9 X 5.49 |
11.29 |
|
3” x SCH 80 (XS) |
88.9 X 7.62 |
15.27 |
|
4” x SCH 40 (STD) |
114.3 X 6.02 |
16.07 |
|
4” x SCH 80 (XS) |
114.3 X 8.56 |
22.31 |
|
5” x SCH 40 (STD) |
141.3 X 6.55 |
21.76 |
|
5” x SCH 80 (XS) |
141.3 X 9.52 |
30.94 |
|
5” x SCH 40 (STD) |
141.3 X 6.55 |
21.76 |
|
5” x SCH 80 (XS) |
141.3 X 9.52 |
30.94 |
|
8” x SCH 40 |
219.1 X 8.18 |
42.53 |
|
8” x SCH 160 |
219.1 X 23.01 |
111.25 |
|
10” x SCH 40 |
273.0 X 9.27 |
60.29 |
|
12” x SCH 20 |
323.8 X 6.35 |
49.72 |
|
12” x SCH 40 |
323.8 X 10.31 |
79.72 |
|
12” x SCH 120 |
323.8 X 25.40 |
186.92 |
|
14” x SCH 60 |
355.6 X 15.09 |
126.68 |
|
14” x SCH 80 |
355.6 X 19.05 |
158.08 |
|
16” x SCH 40 |
406.4 X 12.70 |
123.29 |
|
18” x SCH 40 |
457.2 X 14.27 |
155.91 |
|
22” x SCH 80 |
558.8 X 28.58 |
373.58 |
|
24” x SCH 40 |
609.6 X 17.48 |
255.14 |
|
26” x SCH 20 |
660.4 X 12.70 |
202.83 |
|
28” x SCH 30 |
711.2 X 15.88 |
272.18 |
|
30” x SCH 20 |
762.0 X 12.70 |
234.64 |
|
32” x SCH 30 |
812.8 X 15.88 |
311.95 |
|
32” x SCH 40 |
812.8 X 17.48 |
342.70 |
|
34” x SCH 40 |
863.6 X 17.48 |
364.58 |
|
36” x SCH 20 |
914.4 X 12.70 |
282.36 |
|
36” x SCH 30 |
914.4 X 15.88 |
351.72 |
|
36” x SCH 40 |
914.4 X 19.05 |
420.56 |
General industrial piping (e.g., plant structures, machinery).
Boilers and high-pressure piping (requires compatibility with heat-resistant steel standards (e.g., DIN 17175)).
Oil and chemical piping (e.g., API 5L X52 pipe, refer to DIN 2448).
EN Standards: EN 10220, EN 10216 (seamless steel pipes)
ISO Standard: ISO 4200 (dimensions)
ASTM Standards: ASTM A53, ASTM A106 (for carbon steel pipe)
JIS Standards: JIS G3454, JIS G3456
British Standard: BS 1387
DIN 2448: Applicable to seamless steel pipe.
DIN 2458: Applicable to welded steel pipe.
The main difference between the two lies in their manufacturing processes.
DIN 2440: Welded steel pipe, suitable for medium and low pressure systems such as water and gas.
DIN 2448: Seamless steel pipe, suitable for high pressure and high temperature environments such as oil and natural gas.
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