Manufacturer & Supplier of Steel 90° Short Radius Seamless Elbows

Product Overview，In severe industrial fluid transportation environments, the integrity of piping accessories is directly related to system operational safety. The Steel 90° Short Radius Seamless Elbow is a core component designed specifically for high-pressure, high-temperature, and space-constrained conditions. According to the ASME B16.28 standard, its curvature radius is set to 1.0 times the nominal diameter (R=1D). Compared to long-radius elbows, the short-radius design significantly optimizes the compactness of the piping layout while maintaining fluid direction change functionality. More importantly, the seamless manufacturing process completely eliminates the longitudinal weld seam—a potential weak point—ensuring structural homogeneity and reliability of the fitting under extreme pressure fluctuations.
Manufacturing Process & Metallurgical Quality
ur production process abandons traditional welded splicing, utilizing high-performance seamless steel tubes as raw billets entirely. Through medium-frequency induction heating hot forming processes, the metal undergoes plastic deformation at high temperatures. The grain structure is refined, and the flow lines are distributed naturally along the fitting contour, rather than being severed as in welded fittings.Hot Forming Technology: By precisely controlling the pushing speed and temperature, we ensure the thinning rate at the extrados of the elbow remains within standard limits while avoiding wrinkling on the intrados.Non-Destructive Testing: Every batch undergoes ultrasonic testing and magnetic particle inspection to ensure the absence of metallurgical defects such as cracks or slag inclusions on the surface and interior.Heat Treatment: Depending on the material (such as Carbon Steel, Alloy Steel, or Stainless Steel), normalizing, tempering, or solution annealing is performed to eliminate work hardening and restore the material’s corrosion resistance and mechanical toughness.
Specifications & Standards
ASME B16.9 ASME B16.28 .
ASTM A234 WPB, WP50, WP52.
ASTM A420 WPL6.
ASTM A234 WP11, WP22, WP91.
ASTM A403 WP304/304L, WP316/316L.
Sch 20, Sch 40, Sch 80, Sch 160, XXS.
Product design strictly adheres to internationally recognized standards to ensure interchangeability with global piping systems.
Dimensional Standards: ASME B16.9 (Factory-Made Wrought Buttwelding Fittings) and ASME B16.28 (Wrought Steel Butt-Welding Short Radius Elbows and Returns).Material Grades:Carbon Steel: ASTM A234 WPB, WP50, WP52 (Suitable for high-temperature service).Low-Temperature Steel: ASTM A420 WPL6 (Suitable for low-temperature environments, possessing excellent impact toughness).Alloy Steel: ASTM A234 WP11, WP22, WP91 (Suitable for high-pressure and high-temperature steam pipelines).Stainless Steel: ASTM A403 WP304/304L, WP316/316L (Suitable for corrosive media).
Pressure Ratings: Covering full series wall thicknesses including Sch 20, Sch 40, Sch 80, Sch 160, and XXS.
Key Performance Advantages
Structural Integrity: The seamless structure eliminates the risk of weld corrosion and cracking, making it particularly suitable for the transportation of toxic, flammable, or radioactive fluids.
Hydrodynamic Optimization: Although the pressure loss of short radius elbows is slightly higher than that of long radius ones, their smooth internal surface finish and precise geometric dimensions effectively reduce turbulence intensity and minimize erosion wear.Space Efficiency: In densely piped areas such as ship engine rooms and refinery pipe racks, short radius elbows are the optimal solution for resolving space conflicts.
Quality Commitment
Every elbow leaving the factory is accompanied by a Material Test Certificate (MTC), detailing chemical composition analysis and mechanical property test results. We provide not just products, but complete piping solutions compliant with ASTM, ASME, and DIN standards, ensuring your project remains rock-solid even under extreme operating conditions.