Supplier From
Cangzhou,
Hebei,
China
Supplier From
Cangzhou,
Hebei,
China
Product Name: Buttweld 180° Returns (U-Bends)
Standard: ASME B16.9, ASME B16.28, MSS SP-75
Type: Long Radius (LR 1.5D) & Short Radius (SR 1.0D)
Size Range: 1/2â?³ â?? 24â?³ (Seamless); Up to 48â?³ (Welded)
Wall Thickness: SCH 10S to SCH XXS (Heavy wall specialized)
Materials:
Carbon Steel (ASTM A234 WPB, WPL6)
Stainless Steel (304L, 316L, 321)
Alloy Steel (WP11, WP22, WP91)
Custom Service: Support for Custom Radius (3D, 5D) & Special Materials
admin@jsfittings.com
+8618003119682
180° Return Configurations: LR vs. SR
The performance of a 180-degree return is defined by its bend radius, which determines the distance between the inlet and outlet pipes.
Long Radius (LR) 180° Returns
The radius (R) is 1.5 times the nominal pipe size (NPS). The center-to-center dimension is 3D. These are preferred for systems requiring lower pressure drop and smoother flow.
Short Radius (SR) 180° Returns
The radius (R) is equal to the NPS (1.0D). The center-to-center dimension is 2D. SR returns are indispensable for tight bundle heat exchangers and compact skid designs (manufactured per ASME B16.9 or B16.28).
180 deg short and long radius return bend
Technical Specifications & Material Range
At JS FITTINGS, we maintain tight tolerances on back-to-face and center-to-center dimensions to ensure perfect alignment during welding.
Technical Feature Specification Details
Size Range 1/2â?³ to 24â?³ (Seamless), 26â?³ to 48â?³ (Welded)
Wall Thickness Sch 10S, 40, 80, XS, 160, XXS (As per ASME B36.10/B36.19)
Standard Compliance ASME B16.9, ASME B16.28, DIN 2605, MSS SP-75
Manufacturing Process Hot Mandrel Induction Forming or Cold Bending
End Preparation Beveled Ends (ASME B16.25) or Plain Ends
Material Availability:
Carbon Steel: ASTM A234 WPB, WPC (Standard temperature service).
Low-Temp Steel: ASTM A420 WPL6 (Cryogenic and low-temperature service).
Stainless Steel: ASTM A403 WP304/L, WP316/L, WP321, WP347 (High corrosion).
Alloy Steel: ASTM A234 WP11, WP22, WP91 (High-pressure boiler).
Applications for 180-Degree Return Bends
Heat Exchanger Tube Bundles
Boiler Coils & Superheaters
Radiators & Cooling Systems
Oil & Gas Refineries
Why JS FITTINGS 180° Returns Stand Out
â??Controlled Ovality: We ensure the cross-section remains circular throughout the tight 180° bend to prevent flow obstruction.
â??Wall Thickness Integrity: Advanced mandrel forming prevents excessive thinning on the extrados (outer curve), maintaining the pressure rating.
â??Dimensional Precision: Accurate Center-to-Center (V) and Back-to-Face (O) dimensions ensure a perfect fit into tubesheets.
â??Heat Treatment: Full solution annealing or normalizing post-bending to restore mechanical properties and eliminate work hardening.
