For the steam fittings to the boiler and piping to the engines, I've chosen a robust 1.5mm jointing sheet made by Klinger and sourced from Seddon & Black (now Craftmaster Steam Supplies). Identified as PSM/AS, it is a tanged stainless steel sheet sandwich with exfoliated graphite either side (instead of bread!). It is certainly up to the task but it presents a challenge of its own.
|Safety valve flange adaptor (1)|
In the photo above, I used hole punches for the stud holes, tin-snips around the outside and a chisel for the centre hole - which is clearly not too tidy!
|Safety valve flange adaptor (2)|
|Before removal from the boiler!|
|Sentinel Safety Valve manifold|
There are gasket punch sets available but, as they come at a price and don't claim to be able to cut the tanged sheet sandwich materials, I'm looking to find a better alternative.
I've an idea how to do this effectively but some R&D is needed to perfect the technique and the outcome of that will have to wait for the next article!