U-Shape Steel Tube
Seamless Pipe, U-Shape Steel Pipe, U Tube, U Pipe,
U-Shape Steel Tube, Outside Diameter: 5/8" to 1-1/2", Wall Thickness: 1.65mm to 2.77mm, Min Radius: 29mm; Max Radius: 675.84mm, Type of End-Finish: PE, Material: Carbon & Alloy Steel or Stainless Steel
Size Range：OD 5/8"~1 1/2", WT 1.65mm~2.77mm, Min Radius: 29mm ; Max Radius:675.84mm
Type of End-Finish：PE
Heat Treatment: Stress Relief Annealing of U-Tubes after Bending
Surface Condition: Finished U-tubes shall be free of scale, without scratches after bending
Dimensional Tolerances: U-tubes acc. to TEMA R.C.B.
Length of straight part -0/+5 mm
Flattening (also called "Ovality") at the bend shall not exceed 10% of the nominal tube outside diameter.
Wall thickness in bending part acc. to TEMA RCB 2.31
Minimum tube wall thickness in the bend part (Tmin): T(min) ≥ (SW × (2×R + D))/( 2× (R+D)
where: SW is smallest wall thickness, D for Nominal outside diameter, R for radius
1) For R < 100 mm +/- 3 mm
2) For R ≥ 100 mm +/- 5 mm
Straightness tolerance max. 1.5 mm per 1 m
U-Tube ends: Plain, vertically cut to the tube axis
Repairs by welding: Prohibited
Mandatory tests for U-tubes
100% Dimensional and visual control.
100% Ball passed test
100% Hydrostatic test min 10Mpa/ min 10sec.
Coating: Passivation and Oiled, Black Paint or Varnish
Packing: Plastic Plugs in both ends, Bundles of max. 3,000kg with several Steel Strips, Two Tags on each bundle, Wrapped in Waterproof Paper, Packed in Wooden case
Mill Test Certificate: EN 10204/3.1B
Addition: Clean Steel Grade covered with NACE MR-0175
USAGE: Heat-Exchanger; Steam Boiler; Hot-Water Boiler; Medium Temperature Boiler service ; Oil and Gas Transportation, Low-Temperature Service; Ship-Building etc.