Many thanks for your replies ... we'll be using forged steel fittings + sched 80 pipe for this, it's just that there seemed to be a bit of a assortment of fittings in the sections being repaired - no doubt down to replacements over the years! I guess whatever the codes say, the malleable iron...
I am replacing some short sections of 1" steam pipe (6 barg saturated steam). The service seems to be well within the pressure-temperature ratings of malleable iron fittings - 20 barg @ 300 oC - but I notice the unions I am replacing are 3000 lb, and possibly the other screwed fittings. Also I...
I've just read an MSDS which says that citric acid (anhydrous) can form a dust explosion hazard. How true is this? The same goes for sodium methoxide..
