Slotted Pipes
What are Slotted Pipes?
Slotted pipes are specialized hollow sections with precision-cut longitudinal or spiral slots used in filtration, drainage, irrigation, and industrial applications. Their slotted design ensures controlled flow or filtration while maintaining structural integrity. These pipes are widely used in water treatment, chemical processing, mining, and construction industries.
Asiad Steel Industries is a trusted manufacturer, supplier, and exporter of high-quality ERW and seamless slotted pipes in customizable sizes, materials, and finishes.
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) | 20×20 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 Slotted Pipe | Electric Resistance Welded with precision slots, standard wall thickness |
| Seamless Slotted Pipe | Seamless manufacturing, high-pressure applications with slots | |
| 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 |
| Slot Width / Spacing | Customized as per project requirements | |
| 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 Diameter (mm) | Wall Thickness (mm) | Slot Width (mm) | Approx. Weight (kg/m) |
|---|---|---|---|
| 25 | 2.0 | 2.0 | 1.25 |
| 50 | 3.0 | 2.5 | 3.10 |
| 75 | 4.0 | 3.0 | 5.80 |
| 100 | 5.0 | 3.5 | 9.60 |
| 150 | 6.0 | 4.0 | 18.50 |
| 200 | 8.0 | 5.0 | 30.20 |
| 250 | 10.0 | 6.0 | 48.00 |
| 300 | 12.0 | 6.5 | 70.50 |
| 400 | 15.0 | 8.0 | 120.00 |
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 | 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 – 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 Slotted 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 slotted pipes?
Are slotted pipes used in high-pressure systems?
Can slot dimensions be customized?
Are ERW slotted pipes more economical than seamless?
