About Manisha Steel Centre
Manisha Steel Centre is trusted seamless steel pipe supplier in India since 1997.Smls pipe offer high pressure and high temperature standards and are most suitable in the oil and gas industries, construction, and transportation.They are widely applied in the systems, where safety and reliability features take a prominent place. Moreover, Smls steel pipe are more anti-corrosive than other pipes and contain an inner smooth surface for better performance in fluid and gas flow.
A seamless steel pipe is one that is manufactured without any weld or joining at its surface or edges. This means that it is produced from a solid round bar known as a billet; the billet is heated and then pierced to form a tube. The seamless pipe is then stretched and sized to the required diameter and thickness. The first obvious benefit of seamless steel pipes is that they do not have a weld, which may be considered a mechanical weakness.
Seamless Steel Pipe Price
Thickness: 3.73 mm
OD: 21.30 mm
Schedule: Sch 80
Thickness: 2.77 mm
OD: 21.30 mm
Schedule: Sch 40
Thickness: 3.91 mm
OD: 26.70 mm
Schedule: Sch 80
Thickness: 4.78 mm
OD: 21.30 mm
Schedule: Sch 160
| Factor | Seamless Tubes | Welded Tubes |
|---|---|---|
| Made From | Single Piece of Metal | Different Metal Parts Connected Together |
| Raw Material | Steel Billet | Hot Rolled Coil |
| Strength | Higher | Lower |
| Joints | Without Joints | Composed of Joints |
| Length | Shorter | Able to Form in Continuous Lengths |
| Corrosion Resistance | High | Risk of Corrosion Attacks in the Welded Area. |
| Process | Formed During the Rolling Process Once. | Made From Steel Plates Using a Variety of Welding and Bending Techniques. |
| Safety | Provides a Wider Variety of Safety Measures. | Less Safety Precautions Than Seamless Tubes |
| Pressure | Better | Pressure Capacity is 20% Lower Than Seamless Tubes |
| Surface | Surface Quality is Enhanced by Polishing. | Improved Quality of the Surface |
| Cost | Costly | Affordable |
| Application | High-pressure & High-Temperature Applications | Low-Pressure & Low-Temperature Applications |
| Performance | High | Low |
| Technology | Plug & CPE Mill | Induction Welding at High Frequencies |
Seamless Steel Pipe Size
Outside Diameter
1/2 to 36 Inch
Wall Thickness
2.11 to 60 mm
Length
Custom
Shape
Round, Square, Rectangular, Oval etc.
Product Range
International Standards
Automotive Industry
| SAE | 1518, 1012,1010, 1040, 1020, 4130 |
| ASTM | Seamless Steel Pipe A-519 |
| BS | 6323 (Pt-V), 980 |
| DIN | 1629, 2391 |
| IS | 3074, 3601 |
Heat Exchanger, Boiler, Condenser & Superheater
| DIN | 17175 |
| BS | 3059 ( Pt-II Pt-I ) |
| ASTM | A-334, A-192, A-179, A-210, A-209, A-333, A-213, A-556 |
| IS | 2416, 1914,11714 |
Structural, Mechanical General Engineering
| ASTM | A-589, A-268, A-252, A-500, A-269, A-519, A-501 |
| DIN | 1629, 2391 |
| BS | 1775, 806, 6323, 3601 |
| IS | 3601, 1161 |
Oil & Gas Sector
| API | 5CT Seamless Steel Pipe |
| API | 5L Seamless Steel Pipe |
| IS | 1979, 1978 |
Hydrocarbon Process Industry
| BS | 3602,3603 |
| ASTM | A-106, A-53, A-334, A-333, A-519, A-335 Seamless Steel Pipe |
| IS | 6286 |
Railways
| IS | 1161, 1239 (Pt-I) Seamless Steel Pipe |
| BS | Seamless Steel Pipe 980 |
| O.D. Range (inches) |
Oil Quenched & Tempered |
Wall Percent of O.D. |
Soft Annealed or Normalized |
Unannealed or Stress Relief Annealed |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| O.D. & I.D. | O.D. Inches | I.D. Inches | O.D. Inches | I.D. Inches | ||||||
| Plus/Minus | Plus | Minus | Plus | Minus | Plus | Minus | Plus | Minus | ||
| 0.500-1.699 | 0.005 | All | 0.007 | 0.002 | 0.002 | 0.007 | 0.005 | 0.000 | 0.000 | 0.005 |
| Up to 0.499 | 0.005 | All | 0.005 | 0.002 | 0.004 | 0.000 | ||||
| 2.100-2.499 | 0.009 | 0.008 | 0.005 | 0.005 | 0.008 | 0.007 | 0.000 | 0.000 | 0.007 | |
| 1.700-2.099 | 0.008 | All | 0.006 | 0.005 | 0.005 | 0.006 | 0.006 | 0.000 | 0.000 | 0.006 |
| 2.900-3.299 | 0.012 | All | 0.011 | 0.005 | 0.005 | 0.011 | 0.009 | 0.000 | 0.000 | 0.009 |
| 2.500-2.899 | 0.010 | All | 0.009 | 0.005 | 0.005 | 0.009 | 0.008 | 0.000 | 0.000 | 0.008 |
| 3.700-4.099 | 0.014 | All | 0.013 | 0.007 | 0.010 | 0.010 | 0.011 | 0.000 | 0.000 | 0.011 |
| 3.300-3.699 | 0.013 | All | 0.013 | 0.005 | 0.005 | 0.013 | 0.010 | 0.000 | 0.000 | 0.010 |
| 4.500-4.899 | 0.017 | All | 0.016 | 0.007 | 0.012 | 0.012 | 0.013 | 0.000 | 0.000 | 0.013 |
| 4.100-4.499 | 0.015 | All | 0.014 | 0.007 | 0.011 | 0.011 | 0.012 | 0.000 | 0.000 | 0.012 |
| 5.300-5.549 | 0.019 | All | 0.020 | 0.007 | 0.014 | 0.014 | 0.015 | 0.000 | 0.000 | 0.015 |
| 4.900-5.299 | 0.018 | All | 0.018 | 0.007 | 0.013 | 0.013 | 0.014 | 0.000 | 0.000 | 0.014 |
Seamless Steel Pipe Manufacturing Process
At Manisha Steel Centre, mill manufacturing process of seamless pipe starts with choosing the raw material i.e steel billets which are then heated and pierced to make a hollow pipe.This is then succeeded by elongation, whereby through rotary piercing or extrusions; the billet is further stretched to produce a pipe.
The tube is further cold worked through a series of elongation and reduction in size to the required thickness through pilgering or extrusion. Then for increasing its strength and durability, the pipe is put through heat treatment. Moreover, it undergoes other products that include straightening, which involves cutting and surface treatment that conforms to specific applications.
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Seamless Steel Pipe Weight
| Designation of Diameter | O/D | Nominal Wall Thickness | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DIA | SCH.5S | SCH.5 | SCH 10S | SCH.10 | SCH.20S | SCH.30 | SCH.40S | |||||||||
| (A) | (B) | Meter MM | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr |
| 8 | 1/4 | 13.7 | 1.2 | 0.37 | 1.65 | 0.49 | 2 | 0.58 | 2.24 | 0.64 | ||||||
| 6 | 1/8 | 10.3 | 1 | 0.23 | 1.2 | 0.27 | 1.5 | 0.33 | 1.73 | 0.37 | ||||||
| 10 | 3/8 | 17.2 | 1.2 | 0.47 | 1.65 | 0.63 | 2 | 0.74 | 2.31 | 0.87 | ||||||
| 20 | 3/4 | 26.7 | 1.65 | 1.03 | 1.65 | 1.03 | 2.11 | 1.3 | 2.11 | 1.3 | 2.5 | 1.49 | 2.87 | 1.71 | ||
| 15 | 1/2 | 21.3 | 1.65 | 0.01 | 1.65 | 0.81 | 2.11 | 1.02 | 2.11 | 1.02 | 2.5 | 1.15 | 2.77 | 1.29 | ||
| 25 | 1 | 33.4 | 1.65 | 1.31 | 1.65 | 1.31 | 2.77 | 2.13 | 2.77 | 2.13 | 3 | 2.24 | 3.38 | 2.54 | ||
| 40 | 11/2 | 48.3 | 1.65 | 1.93 | 1.65 | 1.93 | 2.77 | 3.16 | 2.77 | 3.16 | 3 | 3.35 | 3.68 | 4.11 | ||
| 32 | 11/4 | 24.2 | 1.65 | 1.67 | 1.65 | 1.67 | 2.77 | 2.73 | 2.77 | 2.73 | 3 | 2.9 | 3.56 | 3.44 | ||
| 100 | 4 | 114.3 | 2.11 | 5.93 | 2.11 | 5.93 | 3.05 | 8.5 | 3.05 | 8.5 | 4.5 | 12.18 | 6.02 | 6.32 | ||
| 50 | 2 | 60.3 | 1.65 | 1.93 | 1.65 | 2.42 | 2.77 | 3.99 | 2.77 | 3.99 | 3.5 | 4.9 | 3.91 | 5.52 | ||
| 80 | 3 | 88.9 | 2.11 | 4.59 | 2.11 | 4.59 | 3.05 | 6.56 | 3.05 | 6.56 | 4 | 8.37 | 5.49 | 11.47 | ||
| 65 | 21/2 | 73 | 2.11 | 3.75 | 2.11 | 3.75 | 3.05 | 5.34 | 3.05 | 5.34 | 3.5 | 6 | 5.16 | 8.77 | ||
| 90 | 31/2 | 101.6 | 2.11 | 5.25 | 2.11 | 5.25 | 3.05 | 7.53 | 3.05 | 7.53 | 4 | 9.62 | 5.74 | 13.78 | ||
| 125 | 5 | 141.3 | 2.77 | 9.61 | 2.77 | 9.61 | 3.4 | 11.74 | 3.43 | 11.74 | 5 | 16.8 | 6.55 | 2210 | ||
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| Factor | Seamless Steel Pipe | ERW (Electric Resistance Welded) Pipe |
|---|---|---|
| Manufacturing Process | Made Without a Seam From a Solid Billet. | Created by Welding Coils or Plates of Steel. |
| Size Range | up to 24" | 1/8" to 24" or More |
| Seam | No seam. | welded seam. |
| Tolerances & Precision | High accuracy (±0.005" or better). | Excellent accuracy (±0.010" to ±0.020"). |
| Strength | Higher | Strong Enough, but Not as Seamless. |
| Surface Finish | Smooth finish. | Rougher Because of the Welding. |
| Cost | Higher | Lower |
| Applications | Oil & Gas, High-pressure, Hydraulic. | Low to Medium Pressure, Structural, Water Pipelines. |
