The 180° flanged elbow we provide features a flange port integrally formed with the elbow, eliminating the on-site welding of flanges and reducing defects in the weld heat-affected zone. During installation, only bolt tightening is required; the parallelism deviation of the two flanges is controlled within ≤0.2mm, the concentricity deviation is ≤1mm, the flatness error of the sealing surface is ≤0.02mm, and it can withstand pressures above 1.6MPa. Materials cover carbon steel, stainless steel 304/316L, duplex steel S32205, alloy steel 15CrMo/WP11, etc.; nominal diameters cover DN15–DN2000; bending radii are available in long radius R=1.5D and short radius R=1.0D; wall thickness grades range from Sch5S to Sch160. Material certificates, hydrostatic test reports, and non-destructive testing reports can be provided upon delivery. For specific specifications, materials, flange standards, and quantity requirements, please contact us for confirmation before quotation.
Overview
The 180° flanged elbow integrates a 180° curved pipe section with flanges at both ends into one piece, used in pipeline systems where the fluid direction is completely reversed. Compared with a combination of two 90° elbows, it reduces the number of welds and lowers the risk of leakage; during installation, only bolt tightening is needed to complete the connection, making it suitable for pipelines that require frequent disassembly for maintenance or have compact space. We can provide materials such as carbon steel, stainless steel 304/316L, duplex steel S32205, and alloy steel 15CrMo/WP11, with nominal diameters covering DN15–DN2000, and bending radii available in long radius R=1.5D and short radius R=1.0D. Products can be shipped with material certificates, hydrostatic test reports, and non-destructive testing reports. For specific specifications, materials, flange standards, and quantity requirements, please contact us for confirmation before quotation.
Key Features
The flange ports and elbow are integrally formed, eliminating the on-site welding of flanges, reducing defects in the weld heat-affected zone, and requiring only bolt tightening during installation. The parallelism deviation of the two flanges is controlled within ≤0.2mm, the concentricity deviation is ≤1mm, and the flatness error of the sealing surface is ≤0.02mm, capable of withstanding pressures above 1.6MPa. Materials cover carbon steel, stainless steel 304/316L, duplex steel S32205, and alloy steel 15CrMo/WP11, adapting to different corrosion and temperature conditions. Nominal diameters cover DN15–DN2000, bending radii are available in long radius R=1.5D or short radius R=1.0D, and wall thickness grades range from Sch5S to Sch160. Products can be shipped with material certificates (MTC), hydrostatic test reports, and non-destructive testing reports, and support customer third-party re-inspection. Customization of material, dimensions, structure, and process is supported, bending angle deviation can be controlled within ±0.3°, and flange ends can match multiple national standards such as GB, ASME, DIN, and JIS.
Applications
Chemical plant reflux systems: such as overhead condenser reflux lines of distillation towers and reactor jacket cooling water circulation lines, requiring resistance to acid and alkali corrosion and reliable sealing. Heating network compensation and bypass: such as U-shaped expansion bends in the primary network of urban central heating and balance lines on the secondary side of heat exchange stations, which need to withstand periodic thermal stress from high-temperature hot water or steam. Compact piping in ship engine rooms: such as main engine seawater cooling lines and fuel daily tank reflux lines, adapting to narrow space layouts. Sanitary-grade processes for food and pharmaceutical: such as dairy pasteurization lines and CIP cleaning loops for bio-fermentation tanks, requiring mirror polishing of internal surfaces with Ra≤0.4μm. Retrofit of old pipelines: replacing double 90° elbow combinations to reduce weld points and improve reliability, suitable for scenarios with limited space or high sealing requirements.
Specifications
Nominal diameters cover DN15–DN2000 (½″–80″), bending radii are available in long radius R=1.5D or short radius R=1.0D, and wall thickness grades range from Sch5S to Sch160. Materials cover carbon steel, stainless steel 304/316L, duplex steel S32205, alloy steel 15CrMo/WP11, etc. Flange ends can match multiple national standards such as GB, ASME, DIN, and JIS; for specific hole spacing and sealing surface forms, please contact us for confirmation. Products can be shipped with material certificates (MTC), hydrostatic test reports, and non-destructive testing reports. For other parameters such as pressure rating and temperature range, please contact us for confirmation according to project requirements.
Purchasing & Delivery
180° flanged elbows are quoted upon inquiry, and the specific price depends on material, specifications, quantity, and customization requirements. Standard products in stock: long-radius or short-radius elbows in conventional materials (carbon steel Q235B, stainless steel 304), common specifications (DN15–DN200), and standard pressure ratings (PN16/PN25), with MOQ as low as 1–5 pieces. Delivery lead time is affected by specifications, materials, customization requirements, and factory production scheduling saturation. Conventional-specification carbon steel pipe fittings can be shipped within 3–7 working days after ordering, and stainless steel stock items require 5–10 working days. Packaging follows the principles of rust prevention, shock resistance, moisture resistance, and traceability, using standardized wooden crates or pallets plus stretch film solutions, and documents included with the crate include material certificates, factory inspection reports, etc. For specific delivery times and packaging requirements, please contact us for confirmation.
Service & Support
We have a team of application engineers providing selection consultation, installation guidance, and working-condition adaptation recommendations; for complex projects, we can issue pipeline stress analysis reports and flange tightening plans. Upon delivery, technical maintenance and repair manuals, general installation drawings, lists of wear parts, and an appropriate amount of spare parts (such as gaskets and bolts) are included. In terms of quality assurance, we strictly implement the three guarantees policy; during the warranty period, if problems such as dimensional deviation, sealing leakage, or material defects occur, we provide free replacement or repair; all shipped products are accompanied by material certificates, hydrostatic test reports, and non-destructive testing reports, and support customer third-party re-inspection. A 24-hour after-sales hotline is established; after receiving problem feedback, we respond within 2 hours, provide solutions for general technical problems within 24 hours, and dispatch engineers to the site within 48 hours for complex on-site problems. Value-added services include regular customer return visits, tracking product usage, and providing preventive maintenance recommendations; dedicated personnel follow up projects throughout the entire process from contract signing to acceptance and delivery.
FAQ
What is the difference between a 180° flanged elbow and a combination of two 90° elbows?
A 180° flanged elbow is integrally formed, with only one weld seam (or no weld seam), fewer leakage points, lower fluid resistance, and quick installation. A combination of two 90° elbows requires two welds, increasing leakage risk and pressure drop, but offers high flexibility and low cost. When space is sufficient and the budget is limited, the double 90° solution can be selected; when space is limited or high sealing requirements are needed, the 180° integral elbow is preferred.
What materials are available for 180° flanged elbows?
We can provide materials such as carbon steel, stainless steel 304/316L, duplex steel S32205, and alloy steel 15CrMo/WP11. Carbon steel is suitable for -40℃ to 600℃ and has relatively low cost; stainless steel is resistant to acid and alkali corrosion and is suitable for -196℃ to 600℃; duplex steel combines high strength and resistance to stress corrosion; alloy steel is specially designed for high-temperature and high-pressure steam service conditions. For specific selection, please contact us to confirm.
What are the nominal diameter and bending radius ranges of 180° flanged elbows?
The nominal diameter covers DN15–DN2000 (½″–80″), and the bending radius is available in long radius R=1.5D and short radius R=1.0D. Long radius elbows can reduce pressure drop and pipe wall wear, while short radius is suitable for low-pressure and space-constrained scenarios. Wall thickness grades range from Sch5S to Sch160 and must match the pipe wall thickness.
What documents are supplied with 180° flanged elbows at the factory?
At the factory, a material test certificate (MTC), hydrostatic test report, and non-destructive testing report can be provided, and customer third-party re-inspection is supported. Some high-end products are certified to PED 2014/68/EU and ASME U Stamp, meeting export and high-end project requirements. For specific certification requirements, please contact us to confirm.
How can I get a quote and delivery lead time for a 180° flanged elbow?
Please provide the required material, specifications, quantity, flange standard, and customization requirements, and we will assist with the quote and confirm the delivery lead time based on the project requirements. Standard items in stock: conventional-specification carbon steel pipe fittings can be shipped within 3–7 working days after order placement, while stainless steel in-stock items require 5–10 working days. The delivery time for customized products depends on the specific requirements.
