Figure 12: Hydraulic Draw-Up Sections
a. STEAM BOILERS: The assembled boiler must be subjected to a hydrostatic test of 45 psig to 55 psig.
b. HOT WATER BOILERS: The assembled boiler must be subjected to a hydrostatic test of not less than 1½ times the maximum allowable working pressure, as established by the relief valve provided with the boiler. For example, a boiler with a 50 psi relief valve must be subjected to a test pressure of 75 psig to 85 psig.
| WARNING |
|
|
| Failure to properly hydrotest all boilers at the |
| correct pressure may result in section assembly |
| failure in operation. |
| 4. EXAMINE BOILER CAREFULLY, INSIDE AND |
| OUTSIDE, to insure against leaks from cocked |
| nipples or through concealed breakage caused in |
| shipping and handling. This precaution is for your |
| protection and will simplify handling of necessary |
| replacements and adjustment claims. |
| 5. After making certain that there are no leaks, drain |
| boiler and remove plugs for boiler trim and other |
Figure 13: Boiler Section Assembly | connections. |
|
19
