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Special Steel Elbows
45 Degree Long Radius Steel Butt-Weld Elbow (ASME B16.9)
The 45° Long Radius (1.5D) butt-weld steel elbow is a s […]
The 45° Long Radius (1.5D) butt-weld steel elbow is a standardized directional piping component compliant with ASME B16.9 dimensional codes and applicable ASTM material specifications. Defined by a bending radius equivalent to 1.5 times the nominal pipe size, this fitting is the preferred transition solution for industrial piping layout design. Compared with short-radius elbows, its streamlined bending structure effectively suppresses fluid turbulence, reduces on-way flow resistance and system pressure drop. This structural advantage minimizes medium erosion and pipeline energy loss, ensuring stable long-term operation of process piping in power, petrochemical, gas transmission and municipal fluid conveyance systems.
To meet full-range dimensional and working condition requirements, our 45° LR butt-weld elbows adopt two mature manufacturing processes: hot-formed seamless forming and plate-fabricated welding. Small and medium-diameter specifications are integrally hot-pressed from qualified seamless pipe blanks without welding joints. The thermoforming process ensures uniform internal metallographic structure, consistent wall thickness and superior structural integrity, free of welding-induced defects and residual stress. For large-diameter and heavy-wall specifications beyond seamless forming limitations, products are fabricated through precision plate leveling, numerical control forming, accurate gap fit-up and full-penetration welding. Strict temperature control and post-forming calibration eliminate dimensional distortion and surface irregularities.
This product lineup covers nominal sizes from DN15 to DN2000, supporting standard wall schedules including SCH40, SCH80 and SCH120, as well as custom heavy-wall fabrication with specialized corrosion allowance. Available material grades cover diversified engineering demands, including ASTM A234 WPB carbon steel, WP11 and WP22 low-alloy steel, P91 high-temperature heat-resistant steel, 16Mn low-temperature pressure vessel steel and Q355B high-strength structural steel. All raw materials are sourced from certified qualified steel mills with complete mill test reports, guaranteeing stable chemical composition, qualified tensile strength, yield strength and impact toughness to adapt to low-temperature, normal-temperature and medium-high pressure service environments.
All pipe ends are precision machined to ASME B16.25 standard butt-weld bevels with strictly controlled root face and bevel angle, realizing full joint penetration during field welding. This standardized end configuration improves welding joint efficiency, structural rigidity and system tightness, avoiding medium leakage during long-term cyclic operation. A complete batch traceability and quality assurance system is implemented for all finished products. Each batch undergoes strict dimensional tolerance verification, visual surface inspection, hardness testing and mechanical property validation. Seamless elbows adopt batch sampling NDT inspection, while welded versions conduct 100% ultrasonic and radiographic testing to eliminate internal volumetric and planar defects.
Featuring low flow resistance, stable mechanical performance and high installation compatibility, 45° long radius butt-weld elbows are widely applied for gentle direction conversion and piping layout optimization in complex industrial systems. They serve as core standard fittings for thermal power generation, petrochemical process pipelines, municipal water supply and drainage, central heating and industrial fluid transmission projects. With standardized manufacturing and rigorous quality control, our products deliver stable, compliant and cost-effective piping transition solutions for global industrial engineering and EPC projects.
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
