U-shape Tube

Our company is delivering a premium quality range of U-Shape Tube to our highly valued customers. Our product is used in heat-exchanger, steam boiler, hot-water boiler, oil and gas transportation. Some specification of our products are as following:
Size Rangei OD 5/8"~1 1/2", WT 1.65mm~2.77mm, Min Radius: 29mm ; Max Radius:675.84mm
Type of End-Finishi PE
Technical Conditions:
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 a Ovalitya ) 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) a Y (SW A (2A R + D))/( 2A (R+D)
where: SW is smallest wall thickness, D for Nominal outside diameter, R for radius
Radius tolerance
1) For R < 100 mm +/- 3 mm
2) For R a Y 100 mm +/- 5 mm
Straightness tolerance max. 1.5 mm per 1 m
U-Tube ends: Plain, vertically cut to the tube axis