1. The forging material should be fabricated, inspected and accepted according to NB/T47008-2010,class Ⅲ.
2. The unlabeled tolerance shall be in accordance with GB/T1804-2000 , grade m.
3. The basic size of thread by GB/T196-2003 "common thread of basic dimensions", thread tolerance by GB/T197-2003 "common thread tolerance" rule.
4. Tube plates using explosive clad plate, titanium layer annealed complex, composite panels to meet NB/T47002.3-2009 standard B1 level ,of the composite tube plate for ultrasonic testing, the management board was 100% fit, composite panels roughness is not greater than 3mm.
5. The minimum thickness of titanium clad plate is 8mm.
6. After processing, the minimum thickness of tube sealing surface is 3mm. |