NFPA-11 galvanized pipe - inside or outside?
NFPA-11 galvanized pipe - inside or outside?
(OP)
NFPA-11 states 4.7.2.1* Galvanized pipe shall be used and 4.7.3.5* Galvanized fittings shall be used. For a tank farm (not a marine system), is the intent to require the use pipe that is galvanized on the inside? Can the pipe be field welded and touched up on the outside only?





RE: NFPA-11 galvanized pipe - inside or outside?
4.7.2 Foam System Piping.
4.7.2.1* Galvanized pipe shall be used.
looks like they mean outside only:::
A.4.7.2.1 Corrosive atmospheres could require other coatings.
PLUS::::
4.7.2.2 Pipe carrying foam concentrate shall not be galvanized.
4.7.2.3 Piping in constant contact with foam concentrates shall be constructed of material compatible with and not affected by the concentrate.
4.7.2.4 Piping in constant contact with foam concentrate shall not have a detrimental effect on the foam concentrate.
not a welder but::
just says welding shall
4.7 Piping.
. 4.7.4.3* Welding shall conform to the requirements of AWS D10.9. 4
RE: NFPA-11 galvanized pipe - inside or outside?
RE: NFPA-11 galvanized pipe - inside or outside?
Scott should give an answer sometime soon
RE: NFPA-11 galvanized pipe - inside or outside?
do you have a section reference for above???
RE: NFPA-11 galvanized pipe - inside or outside?
solution piping, the following C-values shall be used for the
Hazen–Williams formula:
(1) Galvanized steel pipe — 120
(2) Other C-values for corrosion-resistant piping materials in
accordance with NFPA 13
RE: NFPA-11 galvanized pipe - inside or outside?