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| Galvanized fittings are rated for a maximum of 150 psi or less. I've seen them break at natural gas pressure close to the furnace and with building water pressure, probably from being overtightened on the tapered threads. Hydraulic systems run 1800 to 2500 and sometimes greater pressure and take forged steel fittings to actually be rated at that pressure. The hazard with the ordinary galvanized fitting is being hit by pieces of it when it breaks or by a jet of oil when it just cracks a little. I've seen them used but I won't power up equipment plumbed that way.
Gerald J. | |
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galvanized fitting on hydraulic?
