Seamless Steel Pipe

Seamless Steel Pipe

ERW Pipe

ERW Pipe

Welded Pipe

Welded Pipe

Table of Content

What is Seamless Pipe?

 A seamless steel pipes is a circular pipes having a hollow section and no seams around it.Seamless steel pipe has better pressure capacity, strength is higher than ERW welded steel pipe.

ERW Pipe Definition

Electric Resistance Welded (ERW) pipes is manufactured by cold forming a flat steel strip into a rounded tube and passing it through a series of forming rollers to obtain a longitudinal seam. The two edges are then simultaneously heated with a high frequency current and squeezed together to form a bond.

What is Welded Pipe?

Welded pipes is produced by electric resistance welding and the seam has been taken out during manufacturing process.Welded steel pipes products are widely used in boilers, automobiles, ship building lightweight structural steel of the doors and windows, furniture, agricultural machinery, scaffolding, wire conduit, top shelves, containers, etc.

Welded steel pipe dimensions:

  • Outer Diameter: 6mm-4064mm
  • Wall Thickness: 0.3mm-50mm
  • Length: 6mtr-18mtr

Welded Steel Pipe Specifications

Specification : ASTM, ASME, DIN, NFA, JIS

Thickness: 4.0mm - 100mm

Pipes Size : 1/8” NB to 24” NB, 1/4” OD to 24” OD sizes

Tube Size : 1/2" OD to 8" OD

Length :Cut length, Fix length, Single Random, Double Random & Required Length

Form :Round Pipes/Tubes, Square Pipes/Tubes, Rectangular Pipe/Tubes, Coiled Tubes, “U” Shape, Pan Cake Coils, Hydraulic Tubes

End : Plain End, Beveled End, Treaded

Type : Seamless Pipes & Seamless Tubes

Stainless Steel Pipe

Stainless Steel Pipe

Carbon Steel Pipe

Carbon steel Pipe

Alloy Steel Pipe

Alloy Steel Pipe

Inconel Pipe

Inconel Pipes

Carbon Steel Pipe

Hastelloy Pipe

Copper Nickel Pipe

Copper Nickel Pipe

API 5L Pipe

API 5L Seamless Pipe

Nickel Alloy Pipe

Nickel Alloy Pipes

Duplex Steel Pipe

Duplex Steel Pipes

Super Duplex Pipe

Super Duplex Steel Pipes

Monel Fastners

Monel Pipes

Seamless Steel Pipe Grades

Stainless Steel Seamless Pipes & Tubes ASTM A312, A790 TP-304/L/LN/H/N, TP-316/L/LN/H/N/Ti, TP-317L, TP-317LM, TP-321/H, TP-347/H. ASTM A213 / A269 / A270 / A632 TP series - 201, 202, 304, 304H, 304L, 304N, 304LN, 309, 310, 310S, 316, 316H, 316L, 316LN, 316Ti, 317, 317L, 321, 321H, 347, 347H, 348, 348H, 904L, XM10, XM11, XM15, XM19, XM29.
Duplex & Super Duplex Steel Seamless Pipes & Tubes ASTM A240 / ASME SA240 UNS NO S31803, S32205. Werkstoff No. 1.4462
Carbon Steel Seamless Pipes & Tubes ASTM A53, ASTM A106 Gr. A , B & C API 5L Gr. A / B, X42 ,X52 ,X60, ASTM A 53 Gr. A/B, ASTM A 333 GR.1/6 ASTM A179, ASTM A192 ASTM A179, DIN 17175/2391 BS 3059/ Gr 1 & Gr 2, ASTM A 334 GR.1/8/6
Alloy Steel Seamless Pipes & Tubes ASTM A530 / A530M ASTM A 335 GR.P- 1, ASTM A 335 GR.P- 5, ASTM A 335 GR.P- 9, ASTM A 335 GR.P-11, ASTM A 335 GR.P-22, ASTM A 335 GR.P-91. ASTM A 213 T1,T2,T5,T9,T11,T12,T22,T91 DIN 17175 CR.-MO Tubes
Nickel Alloy Seamless Pipes & Tubes ASTM B163, B161, B725, B730 / ASME B163, B161, B725, B730 UNS 2200 (Nickel 200), UNS 2201 (Nickel 201), UNS 4400 (Monel 400), UNS 8020 (Alloy 20 / 20 CB 3, UNS 8825 Inconel (825), UNS 6600 (Inconel 600), UNS 6601 ( Inconel 601), UNS 6625 (Inconel 625), UNS 10276 (Hastelloy C 276)

Steel Seamless Pipe Dimensions

Dimensions and weight chart of seamless pipe according to standard ANSI/ASME B36.10M

NPS Outside diameter Wall thickness Schedule Weight DN Weight A/SA-53
[inch] [mm] [inch] [mm] No class [lbs/ft] [kg/m]
1/8 0.405 10,3 0.049 1,24 10 ... 6 0.19 0,28 -
1/8 0.405 10,3 0.057 1,45 30 ... 6 0.21 0,32 -
1/8 0.405 10,3 0.068 1,73 40 STD 6 0.24 0,37 √
1/8 0.405 10,3 0.095 2,41 80 XS 6 0.31 0,47 - √
1/4 0.540 13,7 0.065 1,65 10 ... 8 0.33 0,49 -
1/4 0.540 13,7 0.073 1,85 30 ... 8 0.36 0,54
1/4 0.540 13,7 0.088 2,24 40 STD 8 0.42 0,63 √
1/4 0.540 13,7 0.119 3,02 80 XS 8 0.54 0,80 - √
3/8 0.675 17,1 0.065 1,65 10 ... 10 0.42 0,63 -
3/8 0.675 17,1 0.073 1,85 30 ... 10 0.47 0,70 -
3/8 0.675 17,1 0.091 2,31 40 STD 10 0.57 0,84 √
3/8 0.675 17,1 0.126 3,20 80 XS 10 0.74 1,10 - √
1/2 0.840 21,3 0.065 1,65 5 ... 15 0.54 0,80 -
1/2 0.840 21,3 0.083 2,11 10 ... 15 0.67 1,00 -
1/2 0.840 21,3 0.095 2,41 30 ... 15 0.76 1,12
1/2 0.840 21,3 0.109 2,77 40 STD 15 0.85 1,27 √
1/2 0.840 21,3 0.147 3,73 80 XS 15 1.09 1,62 - √
1/2 0.840 21,3 0.188 4,78 160 ... 15 1.31 1,95 - √
3/4 1.050 26,7 0.065 1,65 5 ... 20 0.69 1,03 -
3/4 1.050 26,7 0.083 2,11 10 ... 20 0.86 1,28
3/4 1.050 26,7 0.095 2,41 30 ... 20 0.97 1,44
3/4 1.050 26,7 0.113 2,87 40 STD 20 1.13 1,69 √
3/4 1.050 26,7 0.154 3,91 80 XS 20 1.47 2,20 √
3/4 1.050 26,7 0.219 5,56 160 ... 20 1.94 2,90 √
1 1.315 33,4 0.065 1,65 5 ... 25 0.87 1,29 -
1 1.315 33,4 0.109 2,77 10 ... 25 1.41 2,09
1 1.315 33,4 0.114 2,90 30 ... 25 1.46 2,18
1 1.315 33,4 0.133 3,38 40 STD 25 1.68 2,50 √
1 1.315 33,4 0.179 4,55 80 XS 25 2.17 3,24 √
1 1.315 33,4 0.250 6,35 160 ... 25 2.84 4,29
1 1/4 1.660 42,2 0.065 1,65 5 ... 32 1.11 1,65 -
1 1/4 1.660 42,2 0.109 2,77 10 ... 32 1.81 2,69
1 1/4 1.660 42,2 0.117 2,97 30 ... 32 1.93 2,87
1 1/4 1.660 42,2 0.140 3,56 40 STD 32 2.27 3,39 √
1 1/4 1.660 42,2 0.191 4,85 80 XS 32 3.00 4,47 √
1 1/4 1.660 42,2 0.250 6,35 160 ... 32 3.76 5,61 √
1 1/2 1.900 48,3 0.065 1,65 5 ... 40 1.28 1,90 -
1 1/2 1.900 48,3 0.109 2,77 10 ... 40 2.09 3,11
1 1/2 1.900 48,3 0.125 3,18 30 ... 40 2.37 3,53
1 1/2 1.900 48,3 0.145 3,68 40 STD 40 2.72 4,05 √
1 1/2 1.900 48,3 0.200 5,08 80 XS 40 3.63 5,41 √
1 1/2 1.900 48,3 0.281 7,14 160 ... 40 4.86 7,25 √
2 2.375 60,3 0.065 1,65 5 ... 50 1.61 2,39 -
2 2.375 60,3 0.083 2,11 ... ... 50 2.03 3,03
2 2.375 60,3 0.109 2,77 ... ... 50 2.64 3,93
2 2.375 60,3 0.125 3,18 ... ... 50 3.00 4,48
2 2.375 60,3 0.141 3,58 ... ... 50 3.36 5,01
2 2.375 60,3 0.154 3,91 40 STD 50 3.65 5,44 √
2 2.375 60,3 0.172 4,37 ... ... 50 4.05 6,03
2 2.375 60,3 0.188 4,78 ... ... 50 4.39 6,54
2 2.375 60,3 0.218 5,54 80 XS 50 5.02 7,48 √
2 2.375 60,3 0.250 6,35 ... ... 50 5.67 8,45
2 2.375 60,3 0.281 7,14 ... ... 50 6.28 9,36
2 2.375 60,3 0.344 8,74 160 ... 50 7.46 11,11 √
2 2.375 60,3 0.436 11,07 ... XXS 50 9.04 13,44 √
2 1/2 2.875 73,0 0.038 2,11 5 ... 65 2.47 3,69
2 1/2 2.875 73,0 0.109 2,77 ... ... 65 3.22 4,80
2 1/2 2.875 73,0 0.120 3,05 10 ... 65 3,53 5,26
2 1/2 2.875 73,0 0.125 3,18 ... ... 65 3.67 5,48
2 1/2 2.875 73,0 0.141 3,58 ... ... 65 4.12 6,13
2 1/2 2.875 73,0 0.156 3,96 ... ... 65 4.53 6,74
2 1/2 2.875 73,0 0.172 4,37 ... ... 65 4.97 7,40
2 1/2 2.875 73,0 0.188 4,78 ... ... 65 5.40 8,04
2 1/2 2.875 73,0 0.203 5,16 40 STD 65 5.79 8,63 √
2 1/2 2.875 73,0 0.216 5,49 ... ... 65 6.13 9,14
2 1/2 2.875 73,0 0.250 6,35 ... ... 65 7.01 10,44
2 1/2 2.875 73,0 0.276 7,01 80 XS 65 7.66 11,41 √
2 1/2 2.875 73,0 0.375 9,53 160 ... 65 10.01 14,92 √
2 1/2 2.875 73,0 0.552 14,02 ... XXS 65 13.71 20,39 √
3 3.500 88,9 0.083 2,11 ... ... 80 3.03 4,52
3 3.500 88,9 0.109 2,77 ... ... 80 3.95 5,88
3 3.500 88,9 0.120 3,05 10 ... 80 4,34 6,46
3 3.500 88,9 0.125 3,18 ... ... 80 4.51 6,72 √
3 3.500 88,9 0.141 3,58 ... ... 80 5.06 7,53
3 3.500 88,9 0.156 3,96 ... ... 80 5.57 8,29 √
3 3.500 88,9 0.172 4,37 ... ... 80 6.11 9,11
3 3.500 88,9 0.188 4,78 ... ... 80 6.65 9,92 √
3 3.500 88,9 0.216 5,49 40 STD 80 7.58 11,29 √
3 3.500 88,9 0.250 6,35 ... ... 80 8.68 12,93 √
3 3.500 88,9 0.281 7,14 ... ... 80 9.66 14,40 √
3 3.500 88,9 0.300 7,62 80 XS 80 10.25 15,27 √
3 3.500 88,9 0.438 11,13 160 ... 80 14.32 21,35 √
3 3.500 88,9 0.600 15,24 XXS ... 80 18.60 27,68 √
3 1/2 4.000 101,6 0.083 2,11 5 ... 90 3.48 5,18
3 1/2 4.000 101,6 0.109 2,77 ... ... 90 4.53 6,75
3 1/2 4.000 101,6 0.120 3,05 10 ... 90 4.98 7,41
3 1/2 4.000 101,6 0.125 3,18 ... ... 90 5.17 7,72 √
3 1/2 4.000 101,6 0.141 3,58 ... ... 90 5.81 8,65
3 1/2 4.000 101,6 0.156 3,96 ... ... 90 6.40 9,53 √
3 1/2 4.000 101,6 0.172 4,37 ... ... 90 7.03 10,48
3 1/2 4.000 101,6 0.188 4,78 30 ... 90 7.65 11,41 √
3 1/2 4.000 101,6 0.226 5,74 40 STD 90 9.11 13,57 √
3 1/2 4.000 101,6 0.250 6,35 ... ... 90 10.01 14,92 √
3 1/2 4.000 101,6 0.281 7,14 ... ... 90 11.16 16,63 √
3 1/2 4.000 101,6 0.318 8,08 80 XS 90 12.50 18,63 √
4 4.500 114,3 0.083 2,11 5 ... 100 3.92 5,84
4 4.500 114,3 0.109 2,77 ... ... 100 5.11 7,62
4 4.500 114,3 0.120 3,05 10 ... 100 5.62 8,37
4 4.500 114,3 0.125 3,18 ... ... 100 5.84 8,71 √
4 4.500 114,3 0.141 3,58 ... ... 100 6.56 9,77
4 4.500 114,3 0.156 3,96 ... ... 100 7.24 10,78 √
4 4.500 114,3 0.172 4,37 ... ... 100 7.95 11,85
4 4.500 114,3 0.188 4,78 ... ... 100 8.66 12,91 √
4 4.500 114,3 0.203 5,16 ... ... 100 9.32 13,89
4 4.500 114,3 0.219 5,56 ... ... 100 10.01 14,91 √
4 4.500 114,3 0.237 6,02 40 STD 100 10.79 16,07 √
4 4.500 114,3 0.250 6,35 ... ... 100 11.35 16,90 √
4 4.500 114,3 0.281 7,14 ... ... 100 12.66 18,87 √
4 4.500 114,3 0.312 7,92 ... ... 100 13.96 20,78 √
4 4.500 114,3 0.337 8,56 80 XS 100 14.98 22,32 √
4 4.500 114,3 0.438 11,13 120 ... 100 19.00 28,32 √
4 4.500 114,3 0.531 13,49 160 ... 100 22.51 33,54 √

ERW Pipe Schedule Chart

Nominal Pipe Size Outside Diameter Schedule 5 S Schedule 10 S Schedule 20 S Schedule 40 S Schedule 80 S Schedule 160 S XXS
mm inch mm WT mm WEIGHT (KGM) WT mm WEIGHT (KGM) WT mm WEIGHT (KGM) WT mm WEIGHT (KGM) WT mm WEIGHT (KGM) WT mm WEIGHT (KGM) WT mm WEIGHT (KGM)
3 1/8 10.3 1.2 0.20 1.24 0.28 1.5 0.33 1.73 0.37 2.41 0.47 - - - -
6 1/4 13.7 1.2 0.37 1.65 0.49 2.00 0.58 2.24 0.630 3.02 0.80 - - - -
10 3/8 17.1 1.2 0.47 1.65 0.63 2.00 0.74 2.31 0.840 3.20 1.10 - - - -
15 1/2 21.3 1.65 0.80 2.11 1.00 2.30 1.07 2.77 1.27 3.73 1.62 4.75 1.94 7.47 2.55
20 3/4 26.7 1.65 1.03 2.11 1.28 2.55 1.52 2.87 1.69 3.91 2.20 5.56 2.90 7.82 3.64
25 1 33.4 1.65 1.30 2.77 2.09 2.55 1.94 3.38 2.50 4.55 3.24 6.35 4.24 9.09 5.45
32 1.1/4 42.2 1.65 1.65 2.77 2.70 3.00 2.90 3.56 3.39 4.85 4.47 6.35 5.61 9.70 7.77
40 1.1/2 48.3 1.65 1.91 2.77 3.11 3.00 3.55 3.68 4.05 5.08 5.41 7.14 7.25 11.1 10.18
50 2 60.3 1.65 2.40 2.77 3.93 3.00 4.24 3.91 5.44 5.54 7.48 8.74 11.11 11.07 13.44
65 2.1/2 73.0 2.11 3.69 3.05 5.26 4.00 6.81 5.16 8.63 7.01 11.41 9.53 14.91 14.02 20.39
80 3 88.9 2.11 4.51 3.05 6.45 4.00 8.37 5.49 11.29 7.62 15.27 11.1 21.30 15.24 27.68
100 4 114.3 2.11 5.84 3.05 8.36 4.50 12.18 6.02 16.07 8.56 22.32 13.49 33.54 17.12 41.03
125 5 141.3 2.77 9.47 3.40 11.57 5.00 16.80 6.55 21.8 9.53 30.97 15.88 49.11 19.05 57.43
150 6 168.3 2.77 11.32 3.40 13.84 6.35 25.36 7.11 28.26 10.97 42.56 18.25 67.53 21.95 79.22
200 8 219.1 2.77 14.79 3.76 19.96 6.35 33.31 8.18 42.55 12.7 64.64 23.01 111.27 22.23 107.92
250 10 273.1 3.40 22.63 4.19 27.78 6.35 41.77 9.27 60.31 12.7 96.01 28.58 172.33 25.40 155.15
300 12 323.8 3.96 31.25 4.57 36.00 6.35 49.7 9.53 73.88 12.7 132.05 33.32 238.76 25.40 186.97
350 14 355.6 3.96 34.36 4.78 41.3 7.92 67.80 11.13 94.59
ASTM A 312 TP 304
ASTM A 312 TP 316L
ASTM A 312 TP 317L
400 16 406.4 4.19 41.56 4.78 47.29 7.92 77.83 12.7 123.30
450 18 457.2 4.19 46.81 4.78 53.26 7.92 87.71 14.27 155.80
500 20 508.0 4.78 59.25 5.54 68.61 9.53 117.14 15.09 183.42
600 24 610.0s 5.54s 82.47 6.35 94.45 9.53 141.12 17.48 255.41

Seamless Pipe Tolerance

Tolerances according to ASTM A530/A530M, ASTM A999/A999M (ASME SA)
Weight Outside diameter Wall thickness
All standards:
NPS 12 and under
- 3,5% +10%
over NPS 12
-5% +10%

Upon agreement
(ASTM A999:
with minimum wall thickness, max +16%)		 1/8 - 1 1/2" (10,3 - 48,3 mm): - 1/32 (0.031) + 1/64 (0.015) All standards:
- 12,5%
+ limited by weight*

Upon agreement
(ASTM A999:
Minimum wall thickness:
There shall be no variation under the specified WT)

ERW Steel Pipes Applications

Oil & Gas Sector
API 5L Seamless Steel Pipes
API 5CT Seamless Steel Pipes
IS 1978, 1979
Automotive Industry
ASTM A-519 Seamless Steel Pipes
SAE 1010, 1012, 1020, 1040, 1518, 4130
DIN 2391, 1629
BS 980, 6323 (Pt-V)
IS 3601, 3074
Hydrocarbon Process Industry
ASTM A-53, A-106, A-333, A-334, A-335, A-519 Seamless Steel Pipes
BS 3602,3603
IS 6286
Bearing Industry
SAE 52100 Seamless Steel Pipes
Hydraulic Cylinder
SAE 1026, 1518 Seamless Steel Pipes
IS 6631
DIN 1629
Boiler, Heat Exchanger, Superheater & Condenser
ASTM A-179, A-192, A-209, A-210, A-213, A-333, A-334,A-556
BS 3059 (Pt-I   Pt-II)
IS 1914, 2416, 11714
DIN 17175
Railways  
IS 1239 (Pt-I),1161 Seamless Steel Pipes
BS 980 Seamless Steel Pipes
Mechanical, Structural General Engineering
ASTM A-252, A-268, A-269, A-500, A-501, A-519, A-589 Seamless Steel Pipes
DIN 1629, 2391
BS 806, 1775, 3601, 6323
IS 1161, 3601

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