Our last blog post featured a few videos of the flue tube instillation and we are happy to report that the boiler is ready for water and pressure (hydro static testing)! A huge step in our final months of completion before our scheduled return of #1702 this summer!
Since the completion the guys have been using compressed (120lbs per square inch) air to test the pressure inside the boiler. Steam Services of America contractor Bob, explained that by using soap and water they can easily locate where the leaks are allowing the air to escape, causing suds to appear. Once identified the leaks will be sealed. The next step is the hydro test which should be conducted sometime this week. After the test is completed a few minor additional items that the boiler needs can be installed and the boiler can be prepped for initial fire-up testing.
Last week Brian worked to complete the fabrication of the water column that will gauge the water level in the boiler.
The engine was moved so that they could prepare to reposition the tender behind the engine. While preforming the first movement test they discovered a few needed repairs to the entrance track of the steam shop. Those will be repaired before the next move.
While #1702 was outside the guys enjoyed giving it a much needed wash!
You can certainly see a change in the firebox interior with the instillation of the tubes and flues and now the transverse arch tubes. These transverse arch tubes are the newest addition. Originally arch tubes were inside the firebox but this new transverse design will prove to be more efficient in circulating the water from the side sheets to the top crown sheet allowing the water to be heated faster and more efficiently.
Steam Services of America also delivered the 30 New Sets Super Heater Units in March. The SH Units will be installed once the hydrostatic testing of the boiler is finished and the boiler is being prepped for fire-up. The SH Units which are installed in the smoke box and lay inside the flues inside the barrel of the boiler take the saturated steam generated in the boiler and reheat the steam through the SH Unit piping from the gases from the firebox which travel trough the super heater flues heating the steam inside the SH Units. The saturated steam is about 450 degrees Fahrenheit when taken out of the boiler and heated to approximately 650 degrees Fahrenheit after passing through the SH Units. Once the steam is superheated it then enters into the valves and pistons where the steam goes to work moving the engine drive wheels.
Our anticipation is growing with the excitement of finally seeing #1702 back on the line! We hope that you have booked your ticket. If not, find all the information HERE.