Rectangular Pipes
What are Rectangular Pipes?
Rectangular pipes are hollow sections with unequal adjacent sides used in structural, architectural, and pressure-based applications. Known for high strength-to-weight ratios and clean weld lines, they are widely used in construction, automotive, and process industries.
Asiad Steel Industries is a trusted source for premium-grade ERW and Seamless Rectangular Pipes in customized sizes, finishes, and materials.
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) | 20×10 mm to 500×300 mm (custom sizes available) |
| Pressure Ratings | ANSI / ASME Class | Class 150, 300, 600, 900, 1500, 2500 |
| PN Ratings | – | PN6, PN10, PN16, PN25, PN40, PN64 |
| Pipe Types | ERW Rectangular Pipe | Electric Resistance Welded, standard wall thickness |
| Seamless Rectangular Pipe | Seamless manufacturing, high-pressure applications | |
| Material Options | Stainless Steel | SS 304, SS 304L, SS 316, SS 316L, SS 321 |
| Carbon Steel | ASTM A500 Grade B, ASTM A36, ASTM A53 | |
| Alloy / Superalloy | Alloy Steel (A234 WP1, WP5, WP9, WP11, WP22, WP91), 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 (CS), ASME B36.19 (SS) |
| ASTM | ASTM A500, ASTM A513, ASTM A182, ASTM A269 | |
| European Standards | EN 10219, EN 10210 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175, IBR Approved | |
| Design Features | Wall Thickness | As per standard EN 10219 / ASTM A500, customized options available |
| End Connections | Plain Ends, Beveled Ends | |
| Tolerance | As per ASME / EN / ASTM 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 | Radiography (RT), Ultrasonic (UT), Magnetic Particle (MPI), Dye Penetrant (DPT) | |
| Destructive Testing | Tensile, Hardness, Impact |
Dimensions
| Outer Width (mm) | Outer Height (mm) | Wall Thickness (mm) | Approx. Weight (kg/m) |
|---|---|---|---|
| 20 | 40 | 2 | 1.25 |
| 25 | 50 | 2.5 | 1.85 |
| 30 | 60 | 3 | 2.65 |
| 40 | 80 | 3 | 3.95 |
| 50 | 100 | 4 | 6.10 |
| 60 | 120 | 4 | 7.30 |
| 80 | 160 | 5 | 12.10 |
| 100 | 200 | 6 | 18.50 |
| 120 | 250 | 6 | 22.80 |
| 150 | 300 | 8 | 37.50 |
| 200 | 400 | 10 | 68.00 |
| 250 | 500 | 12 | 101.50 |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa (Carbon Steel, Stainless Steel, Alloy Steel, Duplex & Super Duplex) |
| Yield Strength | 170 – 450 | MPa |
| Hardness | 120 – 200 | HB (Brinell) |
| Elongation | ≥ 20 – 30 | % |
| Density | 7.8 – 8.0 | g/cm³ |
| Impact Toughness | ≥ 27 – 70 | J (Charpy, grade-dependent) |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 250 – 450 | MPa |
| Corrosion Resistance | Good to Excellent (SS > CS > Alloy Steel > Duplex & Super Duplex) | – |
| Thermal Conductivity | 15 – 50 | W/m·K |
| Coefficient of Thermal Expansion | 11 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.40 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.30 | – |
| Brinell Hardness Range | 120 – 200 | HB |
| Surface Finish | Machined, Pickled, Polished, Passivated | – |
| Welding Type | Electric Resistance Welded (ERW) or Seamless | – |
| Operating Temperature Range | -46 to 600 | °C (material-dependent) |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500 | ASME / EN / ASTM 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 Rectangular Pipes
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What materials are available for rectangular pipes?
Are rectangular pipes used in fluid systems?
Can they be powder coated or painted?
Are seamless rectangular pipes costlier?
