5D Bend Pipe
5D Bend Pipe - industrial steel pipe
A stainless steel return U bend is a type of pipe fitting that is commonly used in plumbing and HVAC systems.
It is designed to change the direction of the fluid flow in a piping system, typically by 180 degrees.
The U bend shape allows the fluid to flow back in the opposite direction.
Stainless steel return U bends have a U-shaped configuration that allows them to make a 180-degree turn in the direction of the flow, similar to other types of U-bend fittings.
Stainless steel return U bends are made from various grades of stainless steel alloys. Stainless steel is a type of alloy that contains at least 10.5% chromium, which provides excellent resistance to corrosion and staining. Depending on the specific application, other elements such as nickel, molybdenum, or titanium may also be added to the stainless steel alloy to achieve desired properties.
Material Selection: Stainless steel return bends are typically crafted from high-quality stainless steel alloys. This material is chosen for its exceptional resistance to corrosion, rust, and staining.
Design: These bends are designed with a U-shaped or semi-circular configuration. This design allows for a 180-degree change in the direction of fluid flow.
Sizing: Stainless steel return bends are available in various sizes, allowing them to be used in a wide range of pipe diameters.
Welded or Seamless: Depending on the application, return bends can be either welded or seamless. Welded versions are created by joining two pieces of stainless steel, while seamless bends are made from a single piece, reducing the risk of leaks.
Corrosion Resistance: Stainless steel return bends offer excellent resistance to corrosion and rust, making them ideal for applications in harsh environments, such as chemical processing plants.
Strength and Durability: Stainless steel is renowned for its strength and durability. These bends can withstand high-pressure systems and temperature variations.
Hygienic Properties: The smooth, non-porous surface of stainless steel is easy to clean, which is crucial for applications where hygiene is a priority, such as in the food and pharmaceutical industries.
Leak Prevention: Properly installed stainless steel return bends provide a secure and leak-free connection, ensuring the integrity of the entire piping system.
Stainless steel return U bends are commonly used in industries such as chemical processing, petrochemicals, and food processing, where corrosion resistance and sanitary conditions are essential. They can be manufactured in different sizes, shapes, and thicknesses to meet specific design requirements.
Chemical and Petrochemical Industry: These bends are used in the conveyance of corrosive chemicals and gases, where maintaining the integrity of the piping system is essential.
Oil and Gas Industry: Return bends are found in pipelines that transport oil, natural gas, and other hydrocarbons.
Food and Beverage Industry: They are essential in food processing plants, breweries, and dairies, where sanitation and corrosion resistance are vital.
Pharmaceutical Industry: In the pharmaceutical sector, return bends are used to maintain the purity of fluids during the manufacturing process.
Marine Applications: Due to their resistance to saltwater corrosion, stainless steel return bends are employed in marine piping systems.
Pipe Bend Manufacturing Process
A pipe bend is a change in direction within a piping system, commonly referred to as an offset.
Pipe bends are usually custom manufactured using bending machines and are designed for specific routing requirements. Unlike elbows, bends provide a smoother flow path and reduced turbulence.
The most common bend radii used in industry are 1.5D, 3D, 5D and 10D. Long-radius bends generally provide lower pressure loss and improved flow performance.
Pipe bends are widely used in chemical processing, oil & gas, power generation, shipbuilding, metallurgy and many other industrial applications.
Bend pipes are available in various radii including 3D, 4D, 5D, 8D and 10D configurations. For example, the centerline radius of a 5D bend equals five times the nominal pipe diameter.
Modern pipe bending equipment enables highly accurate manufacturing with excellent dimensional control and repeatability.
| Item | Pipe Bend | Elbow |
|---|---|---|
| Radius | More than 2D | 1D to 2D |
| Flow Performance | Smoother Flow | Higher Turbulence |
| Pressure Drop | Lower | Higher |
| Manufacturing | Bending Process | Fitting Fabrication |
Uses localized induction heating to produce precise large-radius bends while maintaining material properties.
An economical bending method commonly used in fabrication workshops and exhaust manufacturing.
Suitable for producing very large radii in construction and structural applications.
Produces high-quality bends with minimal deformation and excellent dimensional accuracy.
Frequently used when consistent diameter and superior surface finish are required.
Typical flow patterns and wear zones in a long-radius bend.
Long-radius bends provide a gradual change in flow direction and help reduce particle impact and pipe wear.
Common bend classifications include:
| Dimensions | Standards |
|---|---|
| Outside Diameter | 1/2" – 36" |
| Bending Radius | 3D, 5D, 10D or Custom |
| Angle | Up to 180° |
| Wall Thickness | SCH5 to XXS |
| Materials | Carbon Steel, Stainless Steel, Alloy Steel, Duplex and Nickel Alloys |
The bend is used to change the direction of run of pipe.it advantage is can matach long distance transition requirements,so it is commonly that bends dimension according to customer design.
Formula:L = R x BL = Length of pipe requiredR = Radius of bendB = Constant from table used to find “L”L =30 x 1.5705 =47.115 in.or 47-1/8”
Standards accord to：
Pressure: SCH5 to SCH160
Bending radius(R): R=3D, 5D, 7D and 12D
Bending angle (θ):15°, 30°, 45°, 60°, 90°, 135°, 180°
Outer diamete(D): D≤1800mm
Wall thickness(T): T≤120mm
Straight Length (L): The length between two ends general from 300mm-1500mm
Example: Find the length of pipe required to make a 90 bend with a radius of 30"
| Nominal pipe | Outside Diameter at Bevel | Center to End | ||||
|---|---|---|---|---|---|---|
| DN size | D1 | D2 | C | M | ||
| Series A | Series B | Series A | Series B | |||
| 20×15 | 26.9 | 25 | 21.3 | 18 | 29 | 29 |
| 25×20 | 33.7 | 32 | 26.9 | 25 | 38 | 38 |
| 25×15 | 33.7 | 32 | 21.3 | 18 | 38 | 38 |
| 32×25 | 42.4 | 38 | 33.7 | 32 | 48 | 48 |
| 32×20 | 42.4 | 38 | 26.9 | 25 | 48 | 48 |
| 32×15 | 42.4 | 38 | 21.3 | 18 | 48 | 48 |
| 40×32 | 48.3 | 45 | 42.4 | 38 | 57 | 57 |
| 40×25 | 48.3 | 45 | 33.7 | 32 | 57 | 57 |
| 40×20 | 48.3 | 45 | 26.7 | 25 | 57 | 57 |
| 40×15 | 48.3 | 45 | 21.3 | 18 | 57 | 57 |
| 50×40 | 60.3 | 57 | 48.3 | 45 | 64 | 60 |
| 50×32 | 60.3 | 57 | 42.4 | 38 | 64 | 57 |
| 50×25 | 60.3 | 57 | 33.7 | 32 | 64 | 51 |
| 50×20 | 60.3 | 57 | 26.9 | 25 | 64 | 44 |
| 65×50 | 76.1(73) | 76 | 60.3 | 57 | 76 | 70 |
| 65×40 | 76.1(73) | 76 | 48.3 | 45 | 76 | 67 |
| 65×32 | 76.1(73) | 76 | 42.4 | 38 | 76 | 64 |
| 65×25 | 76.1(73) | 76 | 33.7 | 32 | 76 | 57 |
| 80×65 | 88.9 | 89 | 76.1(73) | 76 | 86 | 83 |
| 80×50 | 88.9 | 89 | 60.3 | 57 | 86 | 76 |
| 80×40 | 88.9 | 89 | 48.3 | 45 | 86 | 73 |
| 80×32 | 88.9 | 89 | 42.4 | 38 | 86 | 70 |
| 90×80 | 101.6 | - | 88.9 | - | 95 | 92 |
| 90×65 | 101.6 | - | 76.1(73) | - | 95 | 89 |
| 90×50 | 101.6 | - | 60.3 | - | 95 | 83 |
| 90×40 | 101.6 | - | 48.3 | - | 95 | 79 |
| 100×90 | 114.3 | - | 101.6 | - | 105 | 102 |
| 100×80 | 114.3 | 108 | 88.9 | 89 | 105 | 98 |
| 100×65 | 114.3 | 108 | 76.1(73) | 76 | 105 | 95 |
| 100×50 | 114.3 | 108 | 60.3 | 57 | 105 | 89 |
| 100×40 | 114.3 | 108 | 48.3 | 45 | 105 | 86 |
| 125×100 | 139.7 | 133 | 114.3 | 108 | 124 | 117 |
| 125×90 | 139.7 | - | 101.6 | - | 124 | 114 |
| 125×80 | 139.7 | 133 | 88.9 | 89 | 124 | 111 |
| 125×65 | 139.7 | 133 | 76.1(73) | 76 | 124 | 108 |
| 125×50 | 133 | 60.3 | 57 | 124 | 105 | |
| 150×125 | 168.3 | 159 | 139.7 | 133 | 143 | 137 |
| 150×100 | 168.3 | 159 | 114.3 | 108 | 143 | 130 |
| 150×90 | 168.3 | - | 101.6 | - | 143 | 127 |
| 150×80 | 168.3 | 159 | 88.9 | 89 | 143 | 124 |
| 150×65 | 168.3 | 159 | 76.1(73) | 76 | 143 | 121 |
| 200×150 | 219.1 | 219 | 168.3 | 159 | 178 | 168 |
| 200×125 | 219.1 | 219 | 139.7 | 133 | 178 | 162 |
| 200×100 | 219.1 | 219 | 114.3 | 108 | 178 | 156 |
| 200×90 | 219.1 | - | 101.6 | - | 178 | 152 |
| 200×200 | 273 | 273 | 219.1 | 219 | 216 | 208 |
| 200×150 | 273 | 273 | 168.3 | 159 | 216 | 194 |
| 200×125 | 273 | 273 | 139.7 | 133 | 216 | 191 |
| 200×100 | 273 | 273 | 114.3 | 108 | 216 | 184 |
| 300×250 | 323.9 | 325 | 273 | 273 | 254 | 241 |
| 300×200 | 323.9 | 325 | 219.1 | 219 | 254 | 229 |
| 300×150 | 323.9 | 325 | 168.3 | 159 | 254 | 219 |
| 300×125 | 323.9 | 325 | 139.7 | 133 | 254 | 216 |
| 350×300 | 355.6 | 377 | 323.9 | 325 | 279 | 270 |
| 350×250 | 355.6 | 377 | 273 | 273 | 279 | 257 |
| 350×200 | 355.6 | 377 | 219.1 | 219 | 279 | 248 |
| 350×150 | 355.6 | 377 | 168.3 | 159 | 279 | 238 |
| 400×350 | 406.4 | 426 | 355.6 | 377 | 305 | 305 |
| 400×300 | 406.4 | 426 | 323.9 | 325 | 305 | 295 |
| 400×250 | 406.4 | 426 | 273 | 273 | 305 | 283 |
| 400×200 | 406.4 | 426 | 219.1 | 219 | 305 | 273 |
| 400×150 | 406.4 | 426 | 168.3 | 159 | 305 | 264 |
| 450×400 | 457.2 | 478 | 406.4 | 426 | 343 | 330 |
| 450×350 | 457.2 | 478 | 355.6 | 377 | 343 | 330 |
| 450×300 | 457.2 | 478 | 323.9 | 325 | 343 | 321 |
| 450×250 | 457.2 | 478 | 273 | 273 | 343 | 308 |
| 450×200 | 457.2 | 478 | 219.1 | 219 | 343 | 298 |
| 500×450 | 508 | 529 | 457.2 | 478 | 381 | 368 |
| 500×100 | 508 | 529 | 406.4 | 426 | 381 | 356 |
| 500×350 | 508 | 529 | 355.6 | 377 | 381 | 356 |
| 500×300 | 508 | 529 | 323.9 | 325 | 381 | 346 |
| 500×250 | 508 | 529 | 273 | 273 | 381 | 333 |
| 500×200 | 508 | 529 | 219.1 | 219 | 381 | 324 |
| 550×500 | 559 | - | 508 | - | 419 | 406 |
| 550×450 | 559 | - | 457 | - | 419 | 394 |
| 550×400 | 559 | - | 406 | - | 419 | 381 |
| 600×550 | 610 | - | 559 | - | 432 | 432 |
| 600×550 | 610 | 630 | 508 | 530 | 432 | 432 |
| 600×450 | 610 | 630 | 457 | 480 | 432 | 419 |
| 650×600 | 660 | - | 610 | - | 495 | 483 |
| 650×550 | 660 | - | 559 | - | 495 | 470 |
| 650×500 | 660 | - | 508 | - | 495 | 457 |
| 700×650 | 711 | - | 660 | - | 521 | 521 |
| 700×600 | 711 | 720 | 610 | 630 | 521 | 508 |
| 700×550 | 711 | - | 559 | - | 521 | 495 |
| 750×700 | 762 | - | 711 | - | 559 | 546 |
| 750×650 | 762 | - | 660 | - | 559 | 546 |
| 750×600 | 762 | - | 610 | - | 559 | 533 |
| 800×750 | 813 | - | 762 | - | 597 | 584 |
| 800×700 | 813 | 820 | 711 | 720 | 597 | 572 |
| 800×650 | 813 | - | 660 | - | 597 | 572 |
| 850×800 | 864 | - | 813 | - | 635 | 622 |
| 850×750 | 864 | - | 762 | - | 635 | 610 |
| 850×700 | 864 | - | 711 | - | 635 | 597 |
| 900×850 | 914 | - | 864 | - | 673 | 660 |
| 900×800 | 914 | 920 | 813 | 820 | 673 | 648 |
| 900×750 | 914 | - | 762 | - | 673 | 635 |
| 950×900 | 965 | - | 914 | - | 711 | 711 |
| 950×850 | 965 | - | 864 | - | 711 | 698 |
| 950×800 | 965 | - | 813 | - | 711 | 686 |
| 1000×950 | 1016 | - | 965 | - | 749 | 749 |
| 1000×900 | 1016 | 1020 | 914 | 920 | 749 | 737 |
| 1000×8500 | 1016 | - | 864 | - | 749 | 724 |
| 1000×1000 | 1067 | - | 1016 | - | 762 | 711 |
| 1050×950 | 1067 | - | 965 | - | 762 | 711 |
| 1050×900 | 1067 | - | 914 | - | 762 | 711 |
| 1100×1050 | 1118 | - | 1067 | - | 813 | 762 |
| 1100×1000 | 1118 | 1120 | 1016 | 1020 | 813 | 749 |
| 1100×950 | 1118 | - | 965 | - | 813 | 737 |
| 1150×1100 | 1168 | - | 1118 | - | 851 | 800 |
| 1150×1050 | 1168 | - | 1067 | - | 851 | 787 |
| 1150×1000 | 1168 | - | 1016 | - | 851 | 775 |
| 1200×1150 | 1220 | - | 1168 | - | 889 | 838 |
| 1200×1100 | 1220 | 1220 | 1118 | 1120 | 889 | 838 |
| 1200×1050 | 1220 | - | 1067 | - | 889 | 813 |
Visual Inspection is conducted on fittings to check any surface imperfections. Both fittings body and weld are checked for any visible surface imperfections such as dents, die marks, porosity, undercuts, etc. Acceptance as per applicable standard.
For packing of carbon steel flanges with painting,we would use the bubble wrap to protect the painting.For flanges without painting or oiled with long-term shipment,we would suggest client to use the anti-tarnish paper and plastic bag to prevent the rust.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
When you partner with Sunny Steel, you can stop worrying about meeting deadlines thanks to our responsive and timely service. You'll also say goodbye to unnecessary shopping around. Instead, you'll get white glove service from an expert who understands your needs and can get you the materials you need quickly.
