Copper U Bend Tube For Boiler 

U Bend Tube Main Testing Item: 1. Heat Treatment and Solution Annealing / Bright Annealing 2. Cutting to required length and deburring; 3. Chemical Composition Analysis Test With 100% PMI and One tube from each heat by Direct Reading Spectrometer 4. Visual Test and Endoscope Test for Surface Quality Test 5. 100% Hydrostatic Test/Pneumatic test and 100% Eddy Current Test 6. Ultrasonic Test subject to the MPS (Material Purchase Specification) 7. Mechanical Tests includes Tension Test, Flattening Test, Flaring Test, Hardness Test 8. Impact Test subject to Standard request 9. Grain Size Test and Intergranular Corrosion Test 10. Ultrasonic measuring of Wall Thickness 11. Stress Relieve Annealing on U bend Parts after bending   U Bend Tubes(U Bend Pipe) Manufacturing Process: Raw material → Grinding一 End Level → Colding Roling → Deoiling → Solution Treatment→Straightening →Cut to length →Picking → Surface Passivation→Inspection→NDT/H…