The 90° flanged elbow combines the elbow's fluid diversion function with the flange's quick-installation structure. When a pipeline needs a right-angle turn, the flange discs at both ends are directly bolted together, eliminating the need for on-site hot work welding, making disassembly, assembly, and later maintenance more convenient. The product we manufacture covers three materials: carbon steel, stainless steel, and alloy steel; the bending curvature is available in long radius (1.5D) and short radius (1.0D); the flange end face is precision-machined, the bolt holes are arranged according to standards, and the sealing faces fit tightly after connection. The product is manufactured according to general industrial standards such as ASME B16.9, ASME B16.5, GB/T12459, HG/T20592, etc., and is formed by integral forging, seamless stamping, and CNC precision turning processes; the inner wall of the flow channel is smooth, which helps reduce medium erosion and pressure loss. For conventional DN15–DN200 carbon steel and 304/316L stainless steel stock items, re-inspection and shipment can be completed within 24 hours after order confirmation. Non-standard diameters, special wall thicknesses, thickened high-pressure pipe walls, non-standard bending curvatures, and surface treatments such as hot-dip galvanizing, sandblasting, and mirror polishing can all be customized according to project requirements. If you need to confirm specific specifications, materials, or pressure ratings, please contact us.
Overview
A 90° flanged elbow is a standardized pipe fitting used for right-angle direction changes in industrial piping systems. It integrates the elbow's fluid direction-changing function with the flange's bolted quick-installation structure; when a pipeline needs a 90° turn, the flange discs at both ends are directly mated and tightened, with no on-site welding required. Compared with traditional welded elbows, flanged connections are more convenient for disassembly, maintenance, and later modification or capacity expansion. Our 90° flanged elbows cover three material systems: carbon steel, stainless steel, and alloy steel. The bend curvature is available in long radius (1.5D) and short radius (1.0D). The flange end faces are precision-machined, the bolt holes are arranged according to standards, and after mating, the sealing surfaces fit tightly together. The products are manufactured according to general industrial standards such as ASME B16.9, ASME B16.5, GB/T12459, and HG/T20592, and are formed using integral forging, seamless stamping, and CNC precision turning processes. The pipe wall is uniform, and the inner wall of the flow passage is smooth, which helps reduce medium erosion and pressure loss.
Key Features
First, weld-free quick installation. Flange bolted connections replace on-site welding, with no hot work required, short installation periods, and convenient operation during later maintenance simply by opening the flanges; the pipe fittings can be reused. Second, wide material coverage. Carbon steel is suitable for municipal heating and ordinary low- and medium-pressure working conditions; 304/316L stainless steel is suitable for anti-corrosion, water purification, pharmaceutical, seawater, and other scenarios; alloy steel is suitable for high-temperature and high-pressure process piping networks. Third, complete curvature specifications. Long radius (1.5D) provides a gentler flow passage transition and is suitable for general pipelines with resistance requirements; short radius (1.0D) saves installation space and is suitable for areas with dense equipment or limited layout. Fourth, sealing surface precision meets standards. The flange faces are flat, the bolt hole positions are standard, and after mating, pressure bearing is stable and not prone to loosening during long-term operation. Fifth, fast response from stock. Conventional DN15–DN200 carbon steel and 304/316L stainless steel styles are kept in stock, and re-inspection and shipment can be completed within 24 hours after order confirmation. Sixth, flexible customization. Non-standard diameters, special wall thicknesses, thickened high-pressure pipe walls, non-standard bend curvatures, special sealing structures, and surface treatments such as hot-dip galvanizing, sandblasting, and mirror polishing can all be customized according to project requirements.
Applications
90° flanged elbows are mainly used for right-angle direction changes in piping systems, covering layout requirements such as horizontal-to-vertical turns, vertical-to-horizontal turns, equipment inlet and outlet connections, pipe rack detours, and floor pipeline direction changes. In municipal water supply and drainage and rainwater-sewage diversion projects, they are used for pipeline network turns and branch pipe connections; in heating and fire sprinkler systems, they are used for pipeline direction changes between pipe racks and floors, and flanged connections facilitate direct connection with valves and equipment; in fine chemicals, biopharmaceuticals, and food and beverage industries, stainless steel material is selected, and the smooth inner wall is not prone to scaling, while flange disassembly facilitates cleaning and sterilization; in salt-fog environments such as seawater desalination, ship piping, and offshore platforms, stainless steel or duplex steel material is selected to reduce welding points and lower corrosion risk; in thermal power steam pipelines and coal chemical high-temperature process piping networks, alloy steel material and thickened pipe walls are selected. Foreign trade pipe wholesalers and overseas engineering centralized procurement customers can also choose conventional stock models, with support for English shipping marks and customized packaging.
Specifications
90° flanged elbows are divided by bend curvature into two mainstream specifications: long radius (1.5D) and short radius (1.0D). Material systems include carbon steel (Q235B, 20#, A105, A234WPB, etc.), stainless steel (304, 304L, 316, 316L, 321, etc.), and alloy steel (15CrMo, 12Cr1MoV, P11, P22, etc.); please contact us to confirm specific grades. Connection forms include single flange (one end welded and one end flanged) and double flange (both ends fully flanged), which can be confirmed according to project requirements. The conventional stock diameter range is DN15–DN200; please contact us to confirm larger or non-standard diameters. Pressure ratings cover PN10, PN16, PN25, PN40, and American standard pressure ratings; the specific selection must be confirmed in combination with the medium, temperature, and working conditions. Surface treatments available include hot-dip galvanizing, cold galvanizing, sandblasting and rust prevention, internal and external mirror polishing, sanitary-grade precision polishing, pickling and passivation, and non-magnetic treatment. Implementation standards include ASME B16.9, ASME B16.5, GB/T12459, HG/T20592, DIN, and EN.
Purchasing & Delivery
For conventional DN15–DN200 carbon steel standard stock styles, the MOQ is as low as 10 pieces, suitable for scattered parts replenishment at construction sites, conventional pipeline network modifications, and foreign trade sample trial orders. For other materials, diameters, and customized specifications, please contact us to confirm the minimum order quantity. We have dedicated production lines for automated forging, stamping, precision turning, and anti-corrosion treatment. Conventional standardized models are kept in stock, and after order confirmation, re-inspection, protective packaging, and shipment can be completed within 24 hours. The lead time for customized orders must be confirmed according to the specific specifications and quantities. Packaging uses foreign-trade-grade solutions for impact resistance, rust prevention, and moisture protection: thickened protective film is applied to flange sealing surfaces and precision-machined end faces, and plastic protective plugs are inserted into bolt holes; small and medium diameter elbows are wrapped in pearl cotton and then packed separately in thickened hard cardboard boxes; medium and large diameter heavy-duty elbows are wrapped on the inner layer with anti-rust oil paper and waterproof film, and the outer layer is wrapped with thickened waterproof woven fabric; full-container shipments are uniformly palletized on fumigation-free solid wood pallets, secured with steel straps, and shaped with stretch film. English shipping marks, model and specification labels, material identification, batch numbers, and customer LOGOs can be customized on request.
Service & Support
In the pre-sales stage, our technical team can assist in confirming radius specifications, materials, pressure ratings, and surface treatment plans according to the medium type, pressure, temperature, and working environment, reducing selection deviations. In the after-sales stage, we provide technical guidance on pipeline installation and connection, bolt tightening, pressure testing and commissioning, and pipeline network operation and maintenance, and we track logistics throughout the process and assist overseas customers with rapid customs clearance. Before leaving the factory, products undergo batch-by-batch dimensional verification, precision inspection of sealing surfaces, hydrostatic pressure testing, and material spectral re-inspection. For quality problems caused by factory production processes, processing defects, or material nonconformity, we support free returns and exchanges, free re-inspection, and free replacement shipment, and we bear the corresponding logistics costs. The product warranty is 18 months, with 7×24-hour response service. If you need to confirm specific configurations or obtain a quotation, please contact us and provide the diameter, material, quantity, and working conditions.
FAQ
How to choose between long radius and short radius 90° flanged elbows?
Long radius (1.5D) has a gentler bend transition and low fluid resistance, suitable for conventional pipelines and general working conditions with pressure loss requirements. Short radius (1.0D) takes up less space and is suitable for scenarios with dense equipment, narrow pipe racks, or limited layout. If installation space allows and you want to reduce pipeline resistance, give priority to long radius; if space is tight, choose short radius. For specific selection, you can contact us, and we will assist in confirming according to your pipeline layout and medium parameters.
What is the difference between single-flange and double-flange 90° flange elbows?
A single-flange elbow has one end welded and one end flanged, suitable for mid-pipeline network modifications or scenarios where only one interface needs to be detachable. A double-flange elbow has flanges on both ends, requiring no welding for assembly and disassembly, making it easy to inspect and reuse, suitable for pipelines that need regular maintenance or modification and capacity expansion. We can provide both forms according to project requirements; please contact us to confirm the specific connection method.
What working conditions are different materials suitable for respectively?
Carbon steel material is suitable for ordinary medium and low pressure working conditions such as municipal water supply and drainage, heating, and fire protection. 304/316L stainless steel is suitable for scenarios with requirements for corrosion resistance or cleanliness, such as anti-corrosion, water purification, pharmaceuticals, food and beverages, and seawater. Alloy steel (such as 15CrMo, 12Cr1MoV, P11, P22, etc.) is suitable for high-temperature and high-pressure working conditions such as thermal power steam pipelines and coal chemical high-temperature process pipelines. The specific grade selection needs to be confirmed based on the medium, temperature, and pressure; please contact us for assistance with selection.
What is the delivery time for standard models?
For standard DN15–DN200 carbon steel and 304/316L stainless steel in-stock styles, re-inspection, protective packaging, and shipment can be completed within 24 hours after order confirmation. The delivery time for non-standard customization, special materials, or large-volume orders needs to be confirmed according to the specific specifications and quantities; please contact us to obtain delivery time information.
What is the minimum order quantity? Can non-standard specifications be customized?
The MOQ for standard DN15–DN200 carbon steel standard in-stock styles is as low as 10 pieces, suitable for construction site replenishment, sample trial orders, and small-batch procurement. The minimum order quantity for other materials, diameters, and customized specifications should be confirmed by contacting us. We support customization of non-standard diameters, special wall thicknesses, thickened high-pressure pipe walls, non-standard bending arcs, special sealing structures, as well as surface treatments such as hot-dip galvanizing, sandblasting, and mirror polishing, and can also produce according to overseas drawings and technical agreements.
