DIN Seamless steel pipe

DIN/EN seamless pipes are extensively applied in petroleum, chemical, power, boiler, and machinery industries. Our prefect products and preferential price have won us customers’ trust and consistently favorable comments.


Our products for DIN/EN Standard has been listed as follows:
BS3059-II 360 Seamless tube
BS3059-II 360 Seamless tube
BS 3059 II 440 boiler tube
BS 3059 II 440 boiler tube
Tubes according to EN 10305-1
Tubes according to EN 10305-1
EN 10216-1 Seamless tubes for pressure purposes
EN 10216-1 Seamless tubes for pressure purposes
EN 10210 Hot finished seamless pipe
EN 10210 Hot finished seamless pipe
DIN 17175 steel seamless pipes
DIN 17175 steel seamless pipes
DIN 2448 seamless steel pipes
DIN 2448 seamless steel pipes
EN10216-2 Non-alloy and steel tubes
EN10216-2 Non-alloy and steel tubes
EN 10297 Mechanical seamless Tubes
EN 10297 Mechanical seamless Tubes
EN 10216 Seamless Steel Tubes
EN 10216 Seamless Steel Tubes
DIN2391 Seamless Precision Steel Tube
DIN2391 Seamless Precision Steel Tube
DIN 1629 Seamless Tubes
DIN 1629 Seamless Tubes
DIN 1630
Steel Grade: St37.4, St44.4, St52.4
Application: Seamless Circular Tubes of Non. Alloy Steels With Very High Quality Requirements
Dimension Range: 10.2-660 mm
DIN 2391-1
Steel Grade: St35, St45, St52
Application: Seamless Precision Steel Tubes
Dimension Range: 4-260 mm
DIN 2440
Steel Grade: St33.2
Application: Steel Tubes Medium Weight Suitable for Screwing
Dimension Range: 10.2-165.1 mm
DIN 2441
Steel Grade:St33.2
Application: Steel Tubes Heavy Weight for Suitable for Screwing
Dimension Range: 10.2-165.1 mm
DIN 2445-1
Steel Grade: St 52.4
Application: Seamless Steel Tubes Subjected to Dynamic Loading-1 Hot Finished Tubes for Use in Fluid Power Systems, Rated for Pressures from 100 bar to 500 bar
Dimension Range: 21.3-355.6 mm
DIN 2445.2
Steel Grade: St 37.4
Application: Seamless Steel Tubes Subjected to Dynamic Loading-2 Precision, Tubes for Use in Fluid Power Systems, Rated for Pressures from 100 bar to 500 bar
Dimension Range: 4.50 mm
DIN 2460
Steel Grade: St35
Application: Steel Pipes for Water Pipelines
Dimension Range: DN80-500
DIN 17175
Steel Grade: St35.8, S05.8,17Mn4,19Mn5, 15Mo3, 13CrMo910, 1OCrMo910, 14MoV63, X20CrMoV12l
Application: Seamless Circular Tubes Made From Steels with Elevated Temperatures
Dimension Range: 10.2-660 mm

Dimension tolerance

StandardTolerance
Out side DiameterWall ThicknessLength
mm
DIN 1630See Table 1See Table 2See Table 3
DIN 2391See Table 410%See Table 5
DIN 2440See Table 6-12.5%, + A±1m
DIN 2441See Table 2-12.5%, + A±1m
DIN 17172SeeTable 7≤13010%Fixed
Length
±500
<13012.5%
DIN 17173See Table 1See Table 2See Table 3
DIN 17175See Table 1See Table 2See Table 3
DIN 17176See Table 8See Table 2See Table 3
DIN 17179See Table 1See Table 2See Table 3
DIN 28180Outside
Diameter
Class 1Class 2Class 3See Table 9≤5000-0,+5
16-30±0.08Not
Applicable
±0.50<5000
-10000
-0,+10
38±0.15<10000By
agreement
A: The upper Limit is fixed by the permissible weight deviation.
Table 1: Permissible Deviation in Outside Diameter in DIN 1630, 17173, 17175, 17179
Outside Diameter – da
mm
Pertilisable Deviation in Diameter
Tube Barrel and Tube EndsAt Tube ends, Subject to
Particular agreement
<100 td>±1% da; (values up to ±0.5mm
are permitted)
±0.4mm
100≤da<200 td>±1% da±0.5% da.
≥200±1% da±0.6% da
Table 2: Permissible Deviation in Wall Thickness in DIN 1630, 17173, 17175, 17176, 17179
Permissible Deviation in Wall Thickness for Outside Diameter, da. and Wall Thicknesses, s
da ≤130mm130mm320mm
s ≤22s<4s≤0.05da0.05da
≤.11da
s<0.11da.s≤0.05da0.05da
≤0.09da
s<0.09da
+5%
-10%
+12.5
%10
±9%+17.5%
-12.5%
±12.5%±10+20%
-15%
+15%
-12.5%
+12.5%
-10%
Table 3: Types of Length and Permissible Deviation in Length in DIN 1630, 17173, 17175, 17176, 17179
Type of LengthPremissuble Deviations in Length,mm
Manfacturing LengthBy agreement
Specified Length±500
Exact
Length
≤6m-0,+10
<6-12mm-0,+15
<12mBy agreement
Table 4: Permissible Deviation in Outside Diameter in DIN 2391
Outside
Diameter
Permissible
Deviation
Outside
Diameter
Permissible
Deviation
Outside
Diameter
Permissible
Deviation
4-10mm±0.08mm75-81mm±0.35mm170-180mm±0.90mm
12-30mm±0.1mm85-90mm±0.40mm190-200mm±1.0mm
32-40mm±0.15mm95-100mm±0.45mm220-240mm±1.20mm
42-50mm±0.20mm110-12mm±0.50mm260mm±1.30mm
55-60mm±0.25mm130-146m±0.70mm
65-70mm±0.30mm150-160m±0.80mm
Table 5: Types of Length and Permissible Deviation in Length in 2391
Type of LengthPremissuble Deviations in Length,mm
Manfacturing LengthBy agreement
Fixed Length<2000 td>±500
≥200010%
Exact
Length
<500mm td>-0,+2
<500-2000mm-0,+3
<2000-5000-0,+5
<5000-7000-0,+10
<7000By agreement

Table 6: Permissible Deviation in Outside Diameter in DIN 2440, 2441

Outside Diameter
(mm)
Max
(mm)
Min
(mm)
Outside Diameter
(mm)
Max
(mm)
Min
(mm)
10.210.69.848.348.847.9
13.514.013.260.360.859.7
17.217.516.276.170.675.3
21.321.821.088.989.688.0
26.927.326.5114.3115.0113.1
33.734.233.3139.7140.0138.5
42.442.942.0165.1166.5163.9

Table 7: Permissible Deviation in Outside Diameter in DIN 17172

Nominal Outside
Diameter-”D”
(mm)
Max.Permissible Diameter Variation
Pipe BodyPipe End
D<200 td>±1%(Values up to ±0.5mm
are permissible in all case)
±1%(Values up to ±0.5mml.
are permissible in A case)
200≤ D<500 td>±1%±0.7%
500≤D±1%1.6mm
Table 8: Permissible Deviation in Outside Diameter in DIN 17176
Manufacturing ProcessLimit Deviation of Outside Diameter
Cold Forming±0.75%
Hot Forming≤100mm±0.75%
<100-320mm±0.9%
<320mm±1.0%

Table 9: Permissible Deviation in Wall Thickness in DIN 28180

Tube Outside DiameterPermisible Deviations In Wall Thickness for Thicknesses
Up to 2Exceeding 2
Tolerance of Classes I and 2±0.20±10% of Wall Thickness
Tolerance Class 3±0.20-10%, +15% of Wall Thickness

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