Purpose: To change the flow direction of the medium in the pipeline, with a smooth arc, low fluid resistance, and reduced erosion and wear of the medium; Applicable working conditions: Main process pipelines for pressure pipelines in chemic
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Long radius elbow LR (R=1.5D) refers to an elbow whose bending radius is 1.5 times the nominal diameter of the pipe. It is the most widely used standard directional pipe fitting in pressure piping engineering. It can achieve direction changes at multiple angles such as 30°, 45°, 60°, 90°, and 180°, and adopts multiple connection forms including butt welding, socket welding, threaded, and flanged connections. It covers materials such as carbon steel, stainless steel, and alloy steel, and complies with mainstream domestic and international standards including GB/T12459, GB/T13401, and ASME B16.9. The fittings are formed by hot pushing and extrusion, with smooth and streamlined transition arcs, uniform wall thickness, low fluid resistance, and low medium pressure drop, effectively reducing erosion and wear of the piping medium. They are widely used in various high-temperature and high-pressure pressure piping systems in petrochemical, electric power and thermal energy, coal chemical, seawater desalination, new energy, municipal fire protection, and wastewater treatment industries. Most conventional angles are available in stock, and non-standard customization such as reducing, thickened, anti-corrosion, and insulation types is also supported, accommodating both domestic engineering project supply and foreign trade export orders.
| Product Name | Long Radius Elbow LR (R=1.5D) |
| Category | Classified by angle into 90°, 45°, 180°, and 30°/60° non-standard elbows / connections include butt welding, socket welding, threaded, and flanged / manufactured using hot pushing, extrusion, stamping, and bending processes / multiple material options available / customization available for reducing, thickened, insulation, and wear-resistant anti-corrosion types. |
| Core parameters include bending angle, curvature radius LRR | 1.5D), nominal diameter DN, SCH wall thickness grade, material grade, and connection method; implemented in accordance with GB/T12459, GB/T13401, and ASME B16.9 standards; also include surface treatment, non-destructive testing level, and product batch number. The bending radius is fixed at 1.5 times the nominal diameter, and this parameter directly determines the fluid resistance. All parameters need to be confirmed in combination with the project medium, pressure, and temperature working conditions; 30° and 60° non-standard angles also need to refer to the customer's drawing technical requirements. |
| Customization | Fixed curvature R=1.5D long radius elbow, supporting 30° and 60° special angle customization; capable of producing reducing LR long radius elbows, thickened high-pressure LR elbows, wear-resistant linings, plastic-lined anti-corrosion, and prefabricated insulated long radius elbows. Non-standard diameters, special wall thicknesses, and special material pipe fittings can be processed according to customer drawings and physical samples. Production can be carried out in accordance with GB, ASME B16.9, and EN multi-national standards, and project-specific technical conditions can also be implemented, with UT, MT, and RT special non-destructive testing completed as required. Can be equipped with sandblasting, black paint, galvanizing, and various anti-corrosion and insulation surface treatments. 90°, 45°, and 180° are standard stock items; 30°, 60°, large-diameter thick-wall, and alloy steel customized parts require preliminary process evaluation to confirm formability |
| MOQ | Conventional stock angles (90°, 45°, 180°) long radius LR elbows, supporting orders starting from 1 PCS, can meet project replacement parts, small sample testing, and small-batch engineering support. Large-diameter, thick-wall, alloy steel materials, as well as 30° and 60° non-standard angles, reducing, insulated, wear-resistant and other special customized products, are subject to cutting, forming, and heat treatment process limitations, and there is a minimum production |
| Lead Time | 90°, 45°, and 180° conventional angle long radius LR elbows are kept in regular stock, and shipment can be arranged within 1-3 working days after order confirmation. For small and medium diameter non-standard customization of ordinary materials (reducing, thickened), delivery is 7-15 working days; for large-diameter, thick-wall, alloy steel materials, as well as 30° and 60° non-standard angle elbows, with non-destructive testing, anti-corrosion, insulation and other accessories |
| Packaging | Small diameter: rust-proof paper protects the bevel, plywood wooden case with shock-absorbing pads for fixing; medium and large diameter: wooden pallet base support, rain-proof film wrapping protection; export packaging: printed product shipping marks, built-in desiccant, wooden case supports fumigation, suitable for land transport and sea transport. |
| Reference Price | Inquire |
Long radius elbow LR (R=1.5D) is the most widely used standard directional pipe fitting in pressure piping. Its bending radius is 1.5 times the nominal diameter of the pipe. Compared with short radius elbows, its curvature is gentler, resulting in lower fluid resistance, reduced medium pressure drop, and effectively reduced erosion and wear. The products cover materials such as carbon steel, stainless steel, and alloy steel, and are manufactured to mainstream domestic and international standards including GB/T12459, GB/T13401, and ASME B16.9. They are widely used in high-temperature and high-pressure pipeline systems in petrochemical, power and thermal, coal chemical, new energy, municipal fire protection, sewage treatment, and other industries.
1. Internationally common mainstream R=1.5D long radius elbow, with low fluid resistance and reduced medium pressure drop. 2. Full angle coverage: 30°, 45°, 60°, 90°, 180°, with regular angles available from stock. 3. Multiple material options: carbon steel, stainless steel, alloy steel, meeting different working condition requirements. 4. Smooth forming curvature, uniform wall thickness, erosion resistance, extending pipeline service life. 5. Non-standard customization supported: reducing, thickened, insulated, wear-resistant and anti-corrosion, machined according to drawings. 6. Manufactured to GB/T12459, GB/T13401, and ASME B16.9 standards, with non-destructive testing available as a supporting service.
Long radius elbow LR is suitable for pressure pipeline systems where the medium flow direction needs to be changed and fluid resistance is a requirement, especially for high-pressure high-speed medium transmission, equipment connection, and pipeline renovation. Typical application industries include petrochemical, power and thermal, coal chemical, seawater desalination, new energy, municipal fire protection, sewage treatment, and others. In space-constrained situations, short radius elbows are recommended, and we can provide selection consultation.
Core parameters include bending angle, curvature radius (R=1.5D), nominal diameter, wall thickness level, material grade, and connection method. The execution standards are GB/T12459, GB/T13401, and ASME B16.9. Specific parameters need to be confirmed based on the project medium, pressure, and temperature conditions; 30° and 60° non-standard angles require reference to the customer's drawing technical requirements. We can provide customization services according to project needs.
Regular stock angles (90°, 45°, 180°) support a minimum order quantity of 1 piece, with shipment within 1-3 working days after order confirmation. The delivery time for non-standard customization of small and medium diameters is 7-15 working days; the delivery time for large diameters, thick walls, alloy steel, and 30° and 60° non-standard angles needs to be confirmed based on process evaluation. For packaging, small diameters use anti-rust paper and wooden cases, medium and large diameters use wooden pallets and rain-proof film, and export packaging supports fumigation and marking printing.
We provide professional selection technical consultation to help confirm parameters such as angle, bore diameter, wall thickness, and material. Products undergo visual and dimensional inspection before leaving the factory, and MTR material certificates, non-destructive testing reports, and export documents can be provided upon request. For after-sales, non-artificial quality defects are handled according to the contract, and online technical Q&A regarding storage, installation, and usage is available.
The bending radius of a long radius elbow is 1.5 times the nominal diameter, resulting in low fluid resistance, making it the preferred choice for pressure piping; the bending radius of a short radius elbow is 1 time the nominal diameter, suitable for space-constrained applications. High-pressure conditions require design review.
We implement standards such as GB/T12459, GB/T13401, and ASME B16.9, with materials covering carbon steel, stainless steel, alloy steel, etc. Specific grades can be confirmed based on project requirements.
90°, 45°, and 180° standard angles are in stock and will be shipped within 1-3 working days after order confirmation; 30° and 60° are custom items, and delivery time needs to be confirmed based on process evaluation.
Supported. Customizable in reducing diameter, thickened wall, insulation, wear resistance, and corrosion resistance, etc. Non-standard bore sizes, special wall thicknesses, and special materials can also be processed according to drawings.
Yes. We can provide MTR material certificates, non-destructive testing reports, and a full set of export documentation as required.
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