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 BS 3059 II 440 boiler tube Tubes according to EN 10305-1 EN 10216-1 Seamless tubes for pressure purposes EN 10210 Hot finished seamless pipe DIN 17175 steel seamless pipes

DIN 2448 seamless steel pipes EN10216-2 Non-alloy and steel tubes EN 10297 Mechanical seamless Tubes EN 10216 Seamless Steel Tubes DIN2391 Seamless Precision Steel Tube 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

Standard	Tolerance
	Out side Diameter				Wall Thickness		Length
	mm
DIN 1630	See Table 1				See Table 2		See Table 3
DIN 2391	See Table 4				10%		See Table 5
DIN 2440	See Table 6				-12.5%, + A		±1m
DIN 2441	See Table 2				-12.5%, + A		±1m
DIN 17172	SeeTable 7				≤130	10%	Fixed Length	±500
					<130	12.5%
DIN 17173	See Table 1				See Table 2		See Table 3
DIN 17175	See Table 1				See Table 2		See Table 3
DIN 17176	See Table 8				See Table 2		See Table 3
DIN 17179	See Table 1				See Table 2		See Table 3
DIN 28180	Outside Diameter	Class 1	Class 2	Class 3	See Table 9		≤5000	-0,+5
	16-30	±0.08	Not Applicable	±0.50			<5000 -10000	-0,+10
	38	±0.15					<10000	By 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 Ends	At 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 ≤130mm			130mm			320mm
s ≤2	2	s<4	s≤0.05da	0.05da ≤.11da	s<0.11da.	s≤0.05da	0.05da ≤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 Length		Premissuble Deviations in Length,mm
Manfacturing Length		By agreement
Specified Length		±500
Exact Length	≤6m	-0,+10
	<6-12mm	-0,+15
	<12m	By 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	±0.08mm	75-81mm	±0.35mm	170-180mm	±0.90mm
12-30mm	±0.1mm	85-90mm	±0.40mm	190-200mm	±1.0mm
32-40mm	±0.15mm	95-100mm	±0.45mm	220-240mm	±1.20mm
42-50mm	±0.20mm	110-12mm	±0.50mm	260mm	±1.30mm
55-60mm	±0.25mm	130-146m	±0.70mm
65-70mm	±0.30mm	150-160m	±0.80mm

Table 5: Types of Length and Permissible Deviation in Length in 2391

Type of Length		Premissuble Deviations in Length,mm
Manfacturing Length		By agreement
Fixed Length		<2000 td>	±500
		≥2000	10%
Exact Length	<500mm td>	-0,+2
	<500-2000mm	-0,+3
	<2000-5000	-0,+5
	<5000-7000	-0,+10
	<7000	By 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)
10.2	10.6	9.8	48.3	48.8	47.9
13.5	14.0	13.2	60.3	60.8	59.7
17.2	17.5	16.2	76.1	70.6	75.3
21.3	21.8	21.0	88.9	89.6	88.0
26.9	27.3	26.5	114.3	115.0	113.1
33.7	34.2	33.3	139.7	140.0	138.5
42.4	42.9	42.0	165.1	166.5	163.9

Table 7: Permissible Deviation in Outside Diameter in DIN 17172

Nominal Outside Diameter-”D” (mm)	Max.Permissible Diameter Variation
	Pipe Body	Pipe 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 Process	Limit 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 Diameter	Permisible Deviations In Wall Thickness for Thicknesses
	Up to 2	Exceeding 2
Tolerance of Classes I and 2	±0.20	±10% of Wall Thickness
Tolerance Class 3	±0.20	-10%, +15% of Wall Thickness