Buttweld 180° Return Bends Bulk supply manufacturer

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: 1/2″ – 24″ (Seamless); Up to 48″ (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

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).
Why JS FITTINGS 180° Returns Stand Out


✔Controlled Ovality: We ensure the cross-section remains circular throughout
the tight 180° bend to prevent flow obstruction.

✔Wall Thickness Integrity: Advanced mandrel forming prevents excessive
thinning on the extrados (outer curve), maintaining the pressure rating.

✔Dimensional Precision: Accurate Center-to-Center (V) and Back-to-Face (O)
dimensions ensure a perfect fit into tubesheets.

✔Heat Treatment: Full solution annealing or normalizing post-bending to
restore mechanical properties and eliminate work hardening.

Minimum Order: 5 tons