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Special Steel Elbows
45° 3D Welded Steel Elbow | Manufacturer & Industrial
The 45° 3D welded steel elbow is a specialized large-ra […]
The 45° 3D welded steel elbow is a specialized large-radius fabricated pipe fitting engineered for high-flow, long-distance fluid transmission piping systems. Defined by a bending radius equivalent to three times the nominal pipe size (3D), this component stands apart from standard 1.5D long-radius elbows featured in conventional piping designs. Its extended gradual bend delivers streamlined fluid transition, effectively mitigating flow turbulence, local eddy formation and hydraulic resistance inside pipelines. Manufactured in strict adherence to ASME B16.9 and GB/T 12459 industrial specifications, this welded elbow is purpose-built for large-diameter pipeline projects that prioritize low pressure loss, stable flow dynamics and long-duration continuous operation.
Fabricated from premium structural steel plates, the 45° 3D welded steel elbow adopts a professional plate rolling and full penetration welding forming process, differing fundamentally from integrally hot-formed seamless elbows. This manufacturing process offers unparalleled flexibility for oversized and non-standard diameter specifications, with superior cost efficiency for large-scale piping projects. The extended 3D bending arc minimizes medium scouring, cavitation and wall shear stress on pipe inner surfaces, resolving common operational defects of standard-radius elbows such as excessive flow velocity fluctuation and concentrated pressure drop. The integral steel structure maintains consistent mechanical rigidity and structural stability under cyclic load and continuous medium impact, extending the overall service cycle of the entire piping network.
Raw material selection is strictly controlled with qualified carbon steel plates featuring uniform metallographic structure, stable chemical composition and excellent weldability. The standardized production workflow covers plate flattening, CNC precision rolling, radian calibration, groove machining and automatic submerged arc welding. All weld joints undergo mandatory non-destructive testing, including ultrasonic testing and radiographic inspection, to eliminate inherent welding flaws such as incomplete penetration, porosity and slag inclusion. Post-weld stress relief annealing is implemented to dissipate residual welding stress, ensuring finished products feature uniform wall thickness, minimal dimensional deviation and smooth internal and external surface finish, fully meeting field installation and operational precision requirements.
With superior hydraulic performance and durable structural reliability, 45° 3D welded steel elbows are widely applied in municipal water supply and drainage, hydraulic engineering, thermal power generation, petrochemical process systems and industrial circulating water piping. In engineering design scenarios requiring low hydraulic loss and steady flow delivery, 3D large-radius welded elbows serve as the optimal structural solution. They effectively stabilize pipeline internal pressure, reduce system operating energy consumption and avoid abnormal pipeline vibration caused by unregulated fluid flow.
As a professional manufacturer and supplier specializing in 3D large-radius welded pipe fittings, we provide customized fabrication covering diverse pipe diameters, wall thicknesses and steel grades. All products feature high dimensional interchangeability and precise matching with standard steel pipes, flanges and valves. Supported by mature welding techniques and a full-process quality control system, our 45° 3D welded steel elbows retain stable structural integrity and excellent fatigue resistance under long-term continuous service, providing reliable foundational support for the safe, efficient and stable operation of various industrial fluid transmission piping systems.
No technical specifications available for this product.
Oil & Gas Industry
Offshore platforms, subsea pipelines, refining equipment, and processing facilities. Excellent resistance to sour gas and chloride stress corrosion cracking.
Chemical Processing
Chemical plants, pharmaceutical production, pulp and paper mills. Superior performance in acidic and chloride-containing environments.
Desalination Plants
Seawater reverse osmosis systems, brine handling, and thermal desalination units. Outstanding resistance to chloride-induced corrosion.
Power Generation
Thermal power plants, nuclear facilities, and renewable energy systems. High-temperature strength and corrosion resistance.
Marine Applications
Shipbuilding, port facilities, and coastal installations. Excellent seawater corrosion resistance and mechanical properties.
Mining & Metallurgy
Slurry pipelines, ore processing, and tailings handling. Resistance to abrasive and corrosive media.
ISO 9001:2015
CE Marking
API 6D
ASME Section IX
EN 10204 3.1
ABS / DNV / BV
ISO 15156 / NACE MR0175
PED 2014/68/EU
Product Features
ISO 9001 Certified
Quality management system certification
10-Year Warranty
Comprehensive product warranty
Global Shipping
Worldwide delivery available
24/7 Support
Technical support and consultation
