Seamless Steel Pipes

Seamless cold drawn steel pipes to DIN 2448 dimensions; 19 – 323.8 mm outside diameter, 2.6 – 40 mm wall thickness. Boiler, oil-drilling and line pipes.

ASTM A53ASTM A106API 5LAPI 5CTAPI 5BDIN 17175DIN 1629TSE 381TSE 301TSE 346DIN 2448

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Production Size Range

Outside diameter: 19.0 mm – 323.8 mm · Wall thickness: 2.6 mm – 40 mm. Seamless production from low-carbon and alloy steel in accordance with the DIN 2448 dimension standard.

Panel and Hood Tubes

Heat-resistant tubes produced between Ø 2-4" outside diameters, in various wall thicknesses, using St 35.8, St 45.8 and 15Mo3 grade steels to DIN 17175.

Boiler Tubes

Tubes of min. 1/2" diameter used in boilers operating at up to 750 °C, in superheaters and heat exchangers, produced using St 35.8, St 45.8, 15Mo3, 13CrMo44 and 10CrMo910 grade steels to DIN 17175.

Oil and Drilling Pipes (OCTG)

Pipes used in drilling wells as casing, production tubing and couplings, produced from H40, J55, K55 and N80 grade steels to API 5CT, threaded and coupled to API 5B.

Line Pipes

Pipes produced with beveled ends to API 5L.

Pipe Weight Calculation

W = 0.02466 × (D − t) × t (kg/m) D: pipe outside diameter (mm) · t: pipe wall thickness (mm) · W: pipe unit weight (kg/m)

Hydrostatic Test Pressure

P = (20 × k × s × t) / D The hydrostatic test pressure is found by a calculation method involving a stress lower than the yield stress of the steel. P: hydrostatic test pressure (bar) · k: percentage of the yield stress used in the calculation · s: specified min. yield stress · t: pipe wall thickness (mm) k values per API 5L: k=0.60 for Grade A, Grade B, X42–X80 · k=0.75 for outside diameter < 5 9/16" · k=0.85 for 6 5/8"–8 5/8" · k=0.90 for 10 3/4"–18" · > 20"

Unit Surface Area

A = D × π × 10⁻³ (m²/m) A: unit surface area (m²/m) · D: pipe outside diameter (mm)

Helix Angle and Production Time

Production time for 1 m of pipe: T = 1 / (cosØ × V) — T: production time (min), Ø: production helix angle, V: welding speed (m/min). The helix angle depends on the strip width (B) and the pipe outside diameter (D). D: outside diameter · d: inside diameter · s: wall thickness · k: material strength (15 for St 33, 26 for St 42) · p: pressure (kg/cm²) · S: safety factor · v: weld safety factor (welded=1, seamless=0.9) · c: production tolerance or possible corrosion loss (between 0 and 2 mm) cos Ø = B / (π × D) — B: strip width (mm), D: pipe outside diameter (mm).

Section Calculation Formulas

Wall thickness by pressure: s = (D × p) / (200 × v × k/S) + c (mm) Cross-section area: A = (π/4) × (D² − d²) (mm²) Section modulus: W = (π/32) × (D⁴ − d⁴) / D (mm³) Moment of inertia: J = (π/64) × (D⁴ − d⁴) (mm⁴) Unit weight: W = 0.02466 × (D − s) × s (kg/m)

Dimension and Value Tables

Seamless Steel Pipes — Standard Dimensions and Weights (DIN 17175 / EN 10216-2)

Size (inch)	Outside Diameter (mm)	Wall Thickness (mm)	Weight (kg/m)
1/8	10,2	1,6	0,339
1/4	13,5	1,8	0,519
	16	1,8	0,63
3/8	17,2	1,8	0,684
	19	2	0,838
	20	2	0,888
1/2	21,3	2	0,952
	25	2	1,13
	25,4	2	1,15
3/4	26,9	2,3	1,40
	30	2,6	1,76
	31,8	2,6	1,87
1	33,7	2,6	1,99
	38	2,6	2,27
1 1/4	42,4	2,6	2,55
	44,5	2,6	2,69
1 1/2	48,3	2,6	2,93
	51	2,6	3,10
	54	2,6	3,30
	57	2,9	3,87
2	60,3	2,9	4,11
	63,5	2,9	4,33
	70	2,9	4,80
	73	2,9	5,01
2 1/2	76,1	2,9	5,24
	82,5	3,2	6,26
3	88,9	3,2	6,76
	101,6	3,6	8,70
	108	3,6	9,27
4	114,3	3,6	9,83
	127	4	12,1
	133	4	12,7
5	139,7	4	13,4
	152,4	4,5	16,4
	159	4,5	17,1
6	168,3	4,5	18,2
	177,8	5	21,3
	193,7	5,6	26,0
8	219,1	6,3	33,1
	244,5	6,3	37,0
10	273	6,3	41,4
12	323,9	7,1	55,5
14	355,6	8	68,6
16	406,4	8,8	86,3
18	457	10	110
20	508	11	135
	559	12,5	168
24	610	12,5	184
	660	14,2	226

Pipe Outside Diameters and Wall Thicknesses (SCH) — NPS 1/8 – 3 1/2

NPS	DN (mm)	Outside Diameter	SCH 5	SCH 10	SCH 30	SCH 40	SCH 80	SCH 120	XXS
1/8	6	0,405 in (10,29 mm)	0,035 in (0,889 mm)	0,049 in (1,245 mm)	0,057 in (1,448 mm)	0,068 in (1,727 mm)	0,095 in (2,413 mm)
1/4	8	0,540 in (13,72 mm)	0,049 in (1,245 mm)	0,065 in (1,651 mm)	0,073 in (1,854 mm)	0,088 in (2,235 mm)	0,119 in (3,023 mm)
3/8	10	0,675 in (17,15 mm)	0,049 in (1,245 mm)	0,065 in (1,651 mm)	0,073 in (1,854 mm)	0,091 in (2,311 mm)	0,126 in (3,200 mm)
1/2	15	0,840 in (21,34 mm)	0,065 in (1,651 mm)	0,083 in (2,108 mm)	0,095 in (2,413 mm)	0,109 in (2,769 mm)	0,147 in (3,734 mm)	0,170 in (4,318 mm)	0,294 in (7,468 mm)
3/4	20	1,050 in (26,67 mm)	0,065 in (1,651 mm)	0,083 in (2,108 mm)	0,095 in (2,413 mm)	0,113 in (2,870 mm)	0,154 in (3,912 mm)		0,308 in (7,823 mm)
1	25	1,315 in (33,40 mm)	0,065 in (1,651 mm)	0,109 in (2,769 mm)	0,114 in (2,896 mm)	0,133 in (3,378 mm)	0,179 in (4,547 mm)		0,358 in (9,093 mm)
1 1/4	32	1,660 in (42,16 mm)	0,065 in (1,651 mm)	0,109 in (2,769 mm)	0,117 in (2,972 mm)	0,140 in (3,556 mm)	0,191 in (4,851 mm)		0,382 in (9,703 mm)
1 1/2	40	1,900 in (48,26 mm)	0,065 in (1,651 mm)	0,109 in (2,769 mm)	0,125 in (3,175 mm)	0,145 in (3,683 mm)	0,200 in (5,080 mm)		0,400 in (10,160 mm)
2	50	2,375 in (60,33 mm)	0,065 in (1,651 mm)	0,109 in (2,769 mm)	0,125 in (3,175 mm)	0,154 in (3,912 mm)	0,218 in (5,537 mm)	0,250 in (6,350 mm)	0,436 in (11,074 mm)
2 1/2	65	2,875 in (73,02 mm)	0,083 in (2,108 mm)	0,120 in (3,048 mm)	0,188 in (4,775 mm)	0,203 in (5,156 mm)	0,276 in (7,010 mm)	0,300 in (7,620 mm)	0,552 in (14,021 mm)
3	80	3,500 in (88,90 mm)	0,083 in (2,108 mm)	0,120 in (3,048 mm)	0,188 in (4,775 mm)	0,216 in (5,486 mm)	0,300 in (7,620 mm)	0,350 in (8,890 mm)	0,600 in (15,240 mm)
3 1/2	90	4,000 in (101,60 mm)	0,083 in (2,108 mm)	0,120 in (3,048 mm)	0,188 in (4,775 mm)	0,226 in (5,740 mm)	0,318 in (8,077 mm)		0,636 in (16,154 mm)

Pipe Outside Diameters and Wall Thicknesses (SCH) — NPS 4 – 9

NPS	DN (mm)	Outside Diameter	SCH 5	SCH 10	SCH 20	SCH 30	SCH 40/STD	SCH 60	SCH 80	SCH 100	SCH 120	SCH 140	SCH 160
4	100	4,500 in (114,30 mm)	0,083 in (2,108 mm)	0,120 in (3,048 mm)		0,188 in (4,775 mm)	0,237 in (6,020 mm)	0,281 in (7,137 mm)	0,337 in (8,560 mm)		0,437 in (11,100 mm)		0,531 in (13,487 mm)
4 1/2	115	5,000 in (127,00 mm)					0,247 in (6,274 mm)		0,355 in (9,017 mm)
5	125	5,563 in (141,30 mm)	0,109 in (2,769 mm)	0,134 in (3,404 mm)			0,258 in (6,553 mm)		0,375 in (9,525 mm)		0,500 in (12,700 mm)		0,625 in (15,875 mm)
6	150	6,625 in (168,27 mm)	0,109 in (2,769 mm)	0,134 in (3,404 mm)			0,280 in (7,112 mm)		0,432 in (10,973 mm)		0,562 in (14,275 mm)		0,719 in (18,263 mm)
8	200	8,625 in (219,08 mm)	0,109 in (2,769 mm)	0,148 in (3,759 mm)	0,250 in (6,350 mm)	0,277 in (7,036 mm)	0,322 in (8,179 mm)	0,406 in (10,312 mm)	0,500 in (12,700 mm)	0,593 in (15,062 mm)	0,718 in (18,237 mm)	0,812 in (20,625 mm)	0,906 in (23,012 mm)

Pipe Outside Diameters and Wall Thicknesses (SCH 5s–30) — NPS 10 – 24

NPS	DN (mm)	Outside Diameter	SCH 5s	SCH 5	SCH 10s	SCH 10	SCH 20	SCH 30
10	250	10,75 in (273,05 mm)	0,134 in (3,404 mm)	0,134 in (3,404 mm)	0,165 in (4,191 mm)	0,165 in (4,191 mm)	0,250 in (6,350 mm)	0,307 in (7,798 mm)
12	300	12,75 in (323,85 mm)	0,156 in (3,962 mm)	0,165 in (4,191 mm)	0,180 in (4,572 mm)	0,180 in (4,572 mm)	0,250 in (6,350 mm)	0,330 in (8,382 mm)
14	350	14,00 in (355,60 mm)	0,156 in (3,962 mm)	0,156 in (3,962 mm)	0,188 in (4,775 mm)	0,250 in (6,350 mm)	0,312 in (7,925 mm)	0,375 in (9,525 mm)
16	400	16,00 in (406,40 mm)	0,165 in (4,191 mm)	0,165 in (4,191 mm)	0,188 in (4,775 mm)	0,250 in (6,350 mm)	0,312 in (7,925 mm)	0,375 in (9,525 mm)
18	450	18,00 in (457,20 mm)	0,165 in (4,191 mm)	0,165 in (4,191 mm)	0,188 in (4,775 mm)	0,250 in (6,350 mm)	0,312 in (7,925 mm)	0,437 in (11,100 mm)
20	500	20,00 in (508,00 mm)	0,188 in (4,775 mm)	0,188 in (4,775 mm)	0,218 in (5,537 mm)	0,250 in (6,350 mm)	0,375 in (9,525 mm)	0,500 in (12,700 mm)
24	600	24,00 in (609,60 mm)	0,218 in (5,537 mm)	0,218 in (5,537 mm)	0,250 in (6,350 mm)	0,250 in (6,350 mm)	0,375 in (9,525 mm)	0,562 in (14,275 mm)

Pipe Wall Thicknesses (SCH 40s–160) — NPS 10 – 24

NPS	SCH 40s	SCH 40	SCH 60	SCH 80s	SCH 80	SCH 100	SCH 120	SCH 140	SCH 160
10	0,365 in (9,271 mm)	0,365 in (9,271 mm)	0,500 in (12,700 mm)	0,500 in (12,700 mm)	0,593 in (15,062 mm)	0,718 in (18,237 mm)	0,843 in (21,412 mm)	1,000 in (25,400 mm)	1,125 in (28,575 mm)
12	0,375 in (9,525 mm)	0,406 in (10,312 mm)	0,500 in (12,700 mm)	0,500 in (12,700 mm)	0,687 in (17,450 mm)	0,843 in (21,412 mm)	1,000 in (25,400 mm)	1,125 in (28,575 mm)	1,312 in (33,325 mm)
14	0,375 in (9,525 mm)	0,437 in (11,100 mm)	0,593 in (15,062 mm)	0,500 in (12,700 mm)	0,750 in (19,050 mm)	0,937 in (23,800 mm)	1,093 in (27,762 mm)	1,250 in (31,750 mm)	1,406 in (35,712 mm)
16	0,375 in (9,525 mm)	0,500 in (12,700 mm)	0,656 in (16,662 mm)	0,500 in (12,700 mm)	0,843 in (21,412 mm)	1,031 in (26,187 mm)	1,218 in (30,937 mm)	1,437 in (36,500 mm)	1,593 in (40,462 mm)
18	0,375 in (9,525 mm)	0,562 in (14,275 mm)	0,750 in (19,050 mm)	0,500 in (12,700 mm)	0,937 in (23,800 mm)	1,156 in (29,362 mm)	1,375 in (34,925 mm)	1,562 in (39,675 mm)	1,781 in (45,237 mm)
20	0,375 in (9,525 mm)	0,593 in (15,062 mm)	0,812 in (20,625 mm)	0,500 in (12,700 mm)	1,031 in (26,187 mm)	1,280 in (32,512 mm)	1,500 in (38,100 mm)	1,750 in (44,450 mm)	1,968 in (49,987 mm)
24	0,375 in (9,525 mm)	0,687 in (17,450 mm)	0,968 in (24,587 mm)	0,500 in (12,700 mm)	1,218 in (30,937 mm)	1,531 in (38,887 mm)	1,812 in (46,025 mm)	2,062 in (52,375 mm)	2,343 in (59,512 mm)

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