Polished Pipes
What are Polished Pipes?
Polished pipes are precision-engineered hollow sections with a smooth, bright finish suitable for aesthetic, sanitary, and industrial applications. Known for corrosion resistance, high strength, and superior surface quality, they are widely used in chemical processing, pharmaceuticals, food & beverage, architectural projects, and fluid transportation systems.
Asiad Steel Industries is a trusted manufacturer, supplier, and exporter of premium ERW and seamless polished pipes in customized sizes, finishes, and materials.
Key Features
Leak-Proof
Jointing
Durable
Construction
Easy Installation
& Removal
Wide
Compatibility
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Pipe Size (NPS) | 20×20 mm to 500×500 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 Polished Pipe | Electric Resistance Welded with polished surface, standard wall thickness |
| Seamless Polished Pipe | Seamless manufacturing, high-pressure applications with polished finish | |
| 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 |
| Surface Finish | Polished to mirror / satin finish as per requirement | |
| 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 | Polished, Passivated, Machined, Pickled | |
| 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
| Nominal Size (mm) | Outside Diameter (OD) mm | Wall Thickness (mm) | Weight per Meter (kg/m) | Surface Finish |
|---|---|---|---|---|
| 20×20 | 20 | 1.5 – 3.0 | 0.50 – 0.80 | Mirror / Satin Polished |
| 25×25 | 25 | 1.5 – 3.0 | 0.65 – 1.00 | Mirror / Satin Polished |
| 32×32 | 32 | 2.0 – 4.0 | 1.05 – 1.50 | Mirror / Satin Polished |
| 40×40 | 40 | 2.0 – 4.5 | 1.35 – 1.95 | Mirror / Satin Polished |
| 50×50 | 50 | 2.5 – 5.0 | 2.00 – 2.80 | Mirror / Satin Polished |
| 65×65 | 65 | 2.5 – 5.0 | 2.70 – 3.80 | Mirror / Satin Polished |
| 80×80 | 80 | 3.0 – 6.0 | 3.80 – 5.50 | Mirror / Satin Polished |
| 100×100 | 100 | 3.5 – 6.5 | 5.20 – 7.50 | Mirror / Satin Polished |
| 125×125 | 125 | 4.0 – 7.0 | 7.80 – 10.50 | Mirror / Satin Polished |
| 150×150 | 150 | 4.5 – 8.0 | 10.50 – 14.00 | Mirror / Satin Polished |
| 200×200 | 200 | 5.0 – 9.0 | 16.00 – 22.50 | Mirror / Satin Polished |
| 250×250 | 250 | 6.0 – 10.0 | 24.00 – 32.00 | Mirror / Satin Polished |
| 300×300 | 300 | 6.5 – 12.0 | 32.50 – 45.00 | Mirror / Satin Polished |
| 400×400 | 400 | 8.0 – 14.0 | 55.00 – 75.00 | Mirror / Satin Polished |
| 500×500 | 500 | 10.0 – 16.0 | 85.00 – 115.00 | Mirror / Satin Polished |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa |
| Yield Strength | 170 – 450 | MPa |
| Hardness | 120 – 200 | HB |
| Elongation | ≥ 20 – 30 | % |
| Density | 7.8 – 8.0 | g/cm³ |
| Impact Toughness | ≥ 27 – 70 | J (Charpy) |
| 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 | – |
| Surface Finish | Mirror Polished, Brushed, Satin | – |
| Welding Type | Electric Resistance Welded (ERW) or Seamless | – |
| Operating Temperature Range | -46 to 600 | °C (material-dependent) |
| Pressure Rating | Class 150 – 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 Polished 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 polished pipes?
Are polished pipes suitable for sanitary systems?
Can wall thickness and length be customized?
Are seamless polished pipes more expensive than ERW?
