This is primarily for repair work, where as Europipe states above, it is preferable to hot work on a live plant. The isometrics are mostly 2D autocad drawings, with occasional hand drawn sketches during shutdowns so we are not talking about building symbols for 3D work. I have all the designers...
We are starting to use lokring couplings & fittings on site and currently the designers are using a variation of symbols on the isometrics. I can't find anything in British Standards, is there a recognised symbol for a lokring on an isometric?
