Always loosen the bolts in a flange on the side opposite to where you are standing, first.
Add baking soda to the cement you are using in a cement box. Makes it cure faster....of course it may not either. This could be an old engineers tale, but I always did, just in case.
Always make sure the valve is in the open postion when the flange is tightened. It makes for great fun, when you discovered that the newly flashed boiler has a blow down valve that was put together with the valve closed and the flange tightened.
(The most amazing part is the boiler passed a hydrostatic test. Shipyards
That water that you drain out of the intercooler, really is condensation, not a leaking coil. Especially in the summer.
If you turn all of the exhaust fans on high in a spce that includes a boiler, it really will misfire and smoke.
If you have a central cooling system in your engineroom and you loose SW cooling, isolate your refrigeration condensor and shut the fridge compressors off immediately or you will blow the freon out the safety.
and If you continue to play at DD forum, you don't get the work you are paid to do done, so back to refit planning.