Round Pipe
What are Round Pipes?
Round pipes are circular cross-section hollow tubes used extensively for transporting fluids, structural applications, and mechanical systems. These pipes are manufactured using ERW (Electric Resistance Welded) or Seamless processes, offering strength, pressure resistance, and versatility across industrial sectors.
Asiad Steel Industries is a leading manufacturer, supplier, and exporter of high-quality ERW and Seamless Round Pipes in various materials and sizes, tailored to international standards.
Key Features
High
Strength
Durable
Construction
Smooth
Surface Finish
Wide
Compatibility
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Pipe Size (NPS) | ½” to 48” (DN15 – DN1200) |
| Pressure Ratings | ANSI / ASME Class | Class 150, 300, 600, 900, 1500, 2500 |
| PN Ratings | PN Ratings | PN6, PN10, PN16, PN25, PN40, PN64 |
| Pipe Types | ERW / Seamless Pipes | ERW (Electric Resistance Welded) Pipe, Seamless Pipe |
| Material Options | Stainless Steel | SS 304, SS 304L, SS 316, SS 316L, SS 321 |
| Carbon Steel | ASTM A53, ASTM A106, ASTM A333, ASTM A420 | |
| Alloy / Superalloy | Alloy Steel (A335 P1, P5, P9, P11, P22), Inconel 600/625/825 | |
| Duplex & Super Duplex | Duplex 2205, Super Duplex 2507 | |
| Other Materials | Monel 400/K500, Nickel 200/201, Titanium (Grade 2, Grade 5) | |
| Standards & Certifications | ASME / ANSI | ASME B36.10, ASME B36.19 |
| ASTM | ASTM A53, ASTM A106, ASTM A312, ASTM A213 | |
| European Standards | EN 10216, EN 10217, EN 10210 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175, IBR Approved | |
| Design Features | Wall Thickness | As per ASME B36.10 (CS), ASME B36.19 (SS), customized options |
| End Connections | Plain Ends, Beveled Ends, Threaded Ends | |
| Tolerance | As per ASME / ANSI standards | |
| Coating & Surface Finish | Anti-Corrosion Coating | Rust Preventive Oil, Black Oxide, Hot-Dip Galvanized |
| Optional Coatings | Epoxy, PTFE, Polyurethane | |
| Surface Finish | Machined, Pickled, Polished, Passivated | |
| Testing & Inspection | Pressure Testing | Hydrostatic, Pneumatic |
| Non-Destructive Testing | Ultrasonic (UT), Eddy Current, Magnetic Particle (MPI), Dye Penetrant (DPT) | |
| Destructive Testing | Tensile, Hardness, Impact |
Dimensions
| NPS (in) | DN (mm) | OD (mm) | Schedule 10 | Schedule 20 | Schedule 40 | Schedule 80 | Approx. Weight (kg/m) (Sch 40) |
|---|---|---|---|---|---|---|---|
| ½” | 15 | 21.3 | 2.77 | 2.87 | 3.73 | 5.49 | 2.77 |
| ¾” | 20 | 26.7 | 2.87 | 2.87 | 3.91 | 5.49 | 3.57 |
| 1″ | 25 | 33.4 | 2.87 | 3.38 | 4.55 | 6.02 | 5.01 |
| 1¼” | 32 | 42.2 | 3.38 | 3.56 | 4.85 | 6.02 | 6.67 |
| 1½” | 40 | 48.3 | 3.38 | 3.68 | 5.08 | 6.35 | 8.11 |
| 2″ | 50 | 60.3 | 3.56 | 3.91 | 5.54 | 7.11 | 11.1 |
| 2½” | 65 | 73 | 3.91 | 4.19 | 6.02 | 7.62 | 14.7 |
| 3″ | 80 | 88.9 | 4.19 | 4.55 | 6.55 | 8.56 | 19.1 |
| 4″ | 100 | 114.3 | 4.55 | 4.85 | 7.11 | 9.27 | 27.2 |
| 5″ | 125 | 139.7 | 4.85 | 5.08 | 7.62 | 9.53 | 36.9 |
| 6″ | 150 | 168.3 | 5.08 | 5.49 | 8.18 | 10.97 | 49.0 |
| 8″ | 200 | 219.1 | 5.54 | 6.02 | 9.27 | 12.70 | 73.5 |
| 10″ | 250 | 273 | 6.02 | 6.55 | 11.13 | 15.09 | 104 |
| 12″ | 300 | 323.9 | 6.35 | 7.11 | 12.70 | 17.48 | 134 |
| 14″ | 350 | 355.6 | 6.35 | 7.11 | 14.27 | 19.05 | 164 |
| 16″ | 400 | 406.4 | 7.11 | 7.62 | 15.09 | 20.64 | 203 |
| 18″ | 450 | 457 | 7.62 | 8.18 | 16.66 | 23.01 | 250 |
| 20″ | 500 | 508 | 8.18 | 8.56 | 17.48 | 24.99 | 300 |
| 24″ | 600 | 610 | 9.27 | 9.27 | 19.05 | 27.94 | 411 |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 415 – 750 | MPa (Carbon Steel, Stainless Steel, Alloy Steel, Duplex, Titanium) |
| Yield Strength | 170 – 550 | MPa |
| Hardness | 120 – 220 | HB (Brinell) |
| Elongation | ≥ 18 – 30 | % |
| Density | 7.7 – 8.4 | g/cm³ |
| Impact Toughness | ≥ 25 – 75 | J (Charpy, grade-dependent) |
| Modulus of Elasticity (E) | ~105 – 200 | GPa |
| Fatigue Strength | 250 – 450 | MPa |
| Corrosion Resistance | Good to Excellent (SS > CS > Alloy Steel > Duplex / Titanium) | – |
| Thermal Conductivity | 15 – 90 | W/m·K |
| Coefficient of Thermal Expansion | 6 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.35 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.33 | – |
| Brinell Hardness Range | 120 – 220 | HB |
| Surface Finish | Pickled, Polished, Passivated | – |
| Welding Type | ERW (Electric Resistance Welded) / Seamless | – |
| Operating Temperature Range | -50 to 600 | °C (material-dependent) |
| Pressure Rating | PN6 – PN64 / Class 150 – 2500 | ASME / ISO Standards |
Chemical Composition
| Element | SS 304 (%) | SS 304L (%) | SS 316 (%) | SS 316L (%) |
|---|---|---|---|---|
| Carbon (C) | ≤ 0.08 | ≤ 0.03 | ≤ 0.08 | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 8.0 – 10.5 | 8.0 – 12.0 | 10.0 – 14.0 | 10.0 – 14.0 |
| Molybdenum (Mo) | — | — | 2.0 – 3.0 | 2.0 – 3.0 |
| Nitrogen (N) | — | — | ≤ 0.10 | ≤ 0.10 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
Applications of Round Pipes
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What’s the difference between ERW and Seamless Round Pipes?
Can round pipes be galvanized or coated?
Are these pipes suitable for both fluid and structural use?
What’s the lead time for custom orders?
