| Reference | PBD-03544/B631 |
| Date | 9/5/2012 |
| Location | Asia |
| Scope | Item 01 Quantity: 750 Bundle Aluminized Tube 0019x2.0x5000 Mm, Material. A-179 Al For Exchanger of Nf Plant, Ea-2412 & Ea-2402 The Outer Cover & Inner Material Is Aluminum Manufacture of Aluminized tubes. - Bare steel tube to be complied with JIS G 3461-Class 3 “carbon steel boiler and heat exchanger tube”. - Bare steel tube to be normalized after cold work in forming. - Aluminized tube size: 19 O.D x 2.11 Th. X 5000 Length (mm) - All the original tubes shall be inspected by means of the eddy current method. - The Rockwell hardness number of the original tube shall be less than HRB 72. Alumer process - Alumer process shall be applied to the original tube by the hot dip process using a pure aluminum bath (aluminum purity higher than 99.7%) - The outside and inside of the tubes shall be coated with aluminum (hereinafter referred to as C- tube). |
