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Carbon Steel Long Radius 3D-Bend is a precision-engineered pipe fitting used to change the direction of flow in a piping system while maintaining smooth fluid movement. Designed with a bend radius that is three times the pipe diameter (3D), this fitting minimizes pressure loss, reduces flow resistance, and prevents turbulence, ensuring efficient transport of liquids, gases, and steam in industrial applications.
Manufactured from high-quality carbon steel materials such as ASTM A234 WPB, A106 Grade B, and other equivalent grades, these 3D bends offer exceptional strength, durability, and resistance to high temperature and pressure. The carbon steel composition provides excellent toughness, making the bends suitable for use in demanding environments such as refineries, petrochemical plants, power stations, and offshore platforms.
Long Radius 3D-Bends are manufactured according to international standards like ASTM A234 WPB, ASTM A403, ASME B16.9, and MSS SP-75, ensuring compatibility with industrial piping systems. The long radius (typically 3 times the pipe diameter) provides reduced friction and smoother flow, making them ideal for high-velocity and high-pressure applications.
Carbon Steel Long Radius 3D-Bends are typically made from high-quality carbon steel such as ASTM A234 WPB or equivalent grades. The chemical composition includes Carbon (0.30% max), Manganese (0.29–1.06%), Phosphorus (0.05% max), Sulfur (0.058% max), and Silicon (0.10% min). This ensures excellent strength, toughness, and weldability while maintaining durability in high-pressure pipelines.
The Long Radius 3D-Bend is available in both seamless and welded construction, depending on the application requirements and pipe size. Seamless bends are preferred for critical and high-pressure systems, while welded bends provide an economical solution for larger diameters. These bends can be customized in terms of wall thickness, end connection type, and surface finish, such as black, galvanized, painted, or anti-rust coated.
Conforming to international standards like ASTM, ASME, DIN, and EN, Carbon Steel Long Radius 3D-Bends are rigorously tested to ensure precise dimensions and superior mechanical properties. They are widely used in industries where reliable flow control and long service life are essential. Each bend undergoes hydrostatic testing, radiographic inspection, and visual examination to guarantee quality and performance.
These bends exhibit outstanding mechanical performance with high tensile and yield strength, making them capable of withstanding high-pressure and high-temperature environments. The ductility and impact resistance allow the bends to absorb stress during fluid flow, preventing deformation or failure in industrial piping networks.
Carbon Steel Long Radius 3D-Bends are typically manufactured through hot induction bending or cold bending processes. In hot bending, the pipe is heated uniformly and then bent using a specialized bending machine to achieve a smooth 3D curve. Cold bending is used for smaller diameters and involves mechanical bending without heating. Post-bending, each component is heat-treated and inspected for dimensional and mechanical integrity.
Specification Table
| Specification | Details |
|---|---|
| Product | Carbon Steel Long Radius 3D-Bend |
| Material Grades | ASTM A234 WPB, ASTM A106 Grade B, A420 WPL6, EN/DIN equivalents (custom grades available) |
| Type | Long Radius (3D) – Bend with a radius 3 times the nominal pipe diameter |
| Construction | Seamless and Welded |
| Size Range | ½″ to 48″ (DN15 to DN1200) or as per customer requirements |
| Schedule / Wall Thickness | Sch 10 to Sch 160 / XXS and custom thicknesses available |
| Standards | ASTM A234, ASME B16.9, MSS SP-75, EN 10253 |
| Ends / Connections | Bevelled Ends (BW), Plain Ends (PE), or as specified |
| Surface Finish | Black, Painted, Galvanized, Primer-coated, or Custom Finish |
| Pressure Rating | As per ASME/ANSI B16.9 or project requirements (suitable for high-pressure service) |
| Testing & Inspection | Hydrostatic Test, Dimensional Inspection, NDT (RT/UT), PMI Test, Mill Test Certificates (EN 10204 3.1) |
| Applications | Oil & Gas, Petrochemical, Power Generation, Chemical Plants, Shipbuilding, Water Treatment, and Industrial Piping |
Chemical Composition (Typical ranges for SSS32760)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.30 max |
| Manganese (Mn) | 0.29 – 1.06 |
| Phosphorus (P) | 0.050 max |
| Sulfur (S) | 0.058 max |
| Silicon (Si) | 0.10 min – 0.35 max |
| Nickel (Ni) | 0.40 max |
| Copper (Cu) | 0.40 max |
| Chromium (Cr) | 0.40 max |
| Molybdenum (Mo) | 0.15 max |
| Vanadium (V) | 0.08 max |
Mechanical Properties (Typical)
| Property | Value | Test Method / Standard |
|---|---|---|
| Tensile Strength | 415 – 485 MPa (60,000 – 70,000 psi) | ASTM A370 / ASME SA370 |
| Yield Strength | 240 MPa (35,000 psi) min | ASTM A234 / A106 |
| Elongation | 20% (minimum in 50 mm gauge length) | ASTM A234 / A370 |
| Hardness | ≤ 197 HB (Brinell) | ASTM E10 |
| Impact Test (Charpy V-Notch) | 27 J (at room temperature) | ASTM E23 |
| Density | 7.85 g/cm³ | Typical for Carbon Steel |
| Melting Point | 1425 – 1540 °C | Typical for Carbon Steel |
Equivalent Grades
| Standard | Grade | Description / Equivalent |
|---|---|---|
| ASTM / ASME | A234 WPB | Standard grade for carbon steel butt-weld pipe fittings used in high-temperature service |
| ASTM | A106 Grade B | Seamless carbon steel pipe suitable for high-temperature applications |
| ASTM / ASME | A420 WPL6 | Low-temperature carbon steel material for pressure piping and fittings |
| DIN | St 37.0 / St 35.8 | German equivalent for mild carbon steel pressure pipe applications |
| EN | P235GH / P265GH | European standard grades for pressure vessel and high-temperature piping applications |
| BS | 3601 Grade 430 / 3602 Grade 360 | British standard for carbon steel pipes and fittings |
| JIS | STPA 20 / ST37 | Japanese Industrial Standard equivalent for carbon steel pressure pipes |
| ISO | ISO 2604 Grade 235 / 2604 Grade 265 | International standard equivalents for carbon steel piping materials |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Nominal Pipe Size (NPS) | Outside Diameter (mm) | Center to Center (3D Radius) (mm) | Wall Thickness (mm) | Approx. Weight (kg) |
|---|---|---|---|---|
| ½″ | 21.3 | 64 | 2.77 | 0.45 |
| ¾″ | 26.7 | 80 | 2.87 | 0.65 |
| 1″ | 33.4 | 100 | 3.38 | 0.90 |
| 1½″ | 48.3 | 150 | 3.68 | 1.60 |
| 2″ | 60.3 | 180 | 3.91 | 2.40 |
| 3″ | 88.9 | 270 | 5.49 | 5.10 |
| 4″ | 114.3 | 340 | 6.02 | 8.30 |
| 6″ | 168.3 | 510 | 7.11 | 15.90 |
| 8″ | 219.1 | 660 | 8.18 | 25.70 |
| 10″ | 273.0 | 820 | 9.27 | 39.80 |
| 12″ | 323.9 | 970 | 10.31 | 56.40 |
| 14″ | 355.6 | 1065 | 11.13 | 71.20 |
| 16″ | 406.4 | 1220 | 12.70 | 93.60 |
| 18″ | 457.2 | 1370 | 14.27 | 118.50 |
| 20″ | 508.0 | 1520 | 15.09 | 146.00 |
| 24″ | 610.0 | 1830 | 17.48 | 215.00 |
Types Of Carbon Steel Long Radius 3D-Bends and Fittingss
SS S32760 Seamless Pipe
SS S32760 Welded Pipe
SS S32760 ERW Pipe
SS S32760S EFW Pipe
Carbon Steel A234 WPBS Seamless Fittings
S32760H Super Duplex Steel Welded Fittings
S32760 Super Duplex Steel Capillary Fittings
S32760H Super Duplex Steel Heat Exchanger Fittingss
Frequently Asked Questions (FAQ)
Q1: What is a Long Radius 3D-Bend?
A Long Radius 3D-Bend is a pipe fitting where the bend radius is three times the nominal pipe diameter, designed to provide smooth directional changes in piping systems with minimal pressure loss and turbulence.
Q2: What materials are used for Carbon Steel 3D-Bends?
Typically, carbon steel grades such as ASTM A234 WPB, ASTM A106 Grade B, and A420 WPL6 are used. Equivalent DIN, EN, BS, and JIS grades are also available on request.
Q3: Are these bends seamless or welded?
Carbon Steel Long Radius 3D-Bends are available in both seamless and welded construction. Seamless bends are preferred for high-pressure applications, while welded bends are suitable for larger diameters and economical solutions.
Pipes & Fittingss Supplier
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