Mortar Lined Ductile Iron Pipe - Freeze Protection
Mortar Lined Ductile Iron Pipe - Freeze Protection
(OP)
location - artic environment
mortar lined ductile iron pipe, ANSI/AWWA C150/A21.50
new pipe is buried @ roughly 4-feet below grade and several feet in length (a network of pipe).
unforeseen circumstances may force newly installed piping system to be exposed to winter conditions before hydrostatic testing/commissioning. unfortunately, the pipe has been filled with water.
a plan is being prepared to drain as much water from pipe as possible, but there are slight dips in pipe profile whereby not all the water may be removed.
question: anyone know if residual water left in a mortar lined ductile iron piping system that freezes (not a filled piping system) will have any impact on the mortar-lined pipe (i.e. cracking of mortar or otherwise)?
any suggestions to avoid freezing of water are welcome (i.e. circ pumps, glycol, alcohol, etc.).
mortar lined ductile iron pipe, ANSI/AWWA C150/A21.50
new pipe is buried @ roughly 4-feet below grade and several feet in length (a network of pipe).
unforeseen circumstances may force newly installed piping system to be exposed to winter conditions before hydrostatic testing/commissioning. unfortunately, the pipe has been filled with water.
a plan is being prepared to drain as much water from pipe as possible, but there are slight dips in pipe profile whereby not all the water may be removed.
question: anyone know if residual water left in a mortar lined ductile iron piping system that freezes (not a filled piping system) will have any impact on the mortar-lined pipe (i.e. cracking of mortar or otherwise)?
any suggestions to avoid freezing of water are welcome (i.e. circ pumps, glycol, alcohol, etc.).





RE: Mortar Lined Ductile Iron Pipe - Freeze Protection
RE: Mortar Lined Ductile Iron Pipe - Freeze Protection
RE: Mortar Lined Ductile Iron Pipe - Freeze Protection
thanks for the response. i concur regarding avoiding freezing of any pipe. the pipe is installed; hence, heat tracing is an $ option.
all,
also, i need to clarify that the pipe, while it may be filled with water now, the plan is to not have any water in pipe upon draining. however, there are low points along the pipe. also, the pipe has 2-inches of polyurethane insulation and the backfill is basically a mixture of small gravel and silt.
yes, we've discussed the pig option. frankly, i like the pig option along with using an air mover to help with the air drying process of the pipe system. followed up with some dry nitrogen and perhaps any freezing can be avoided.
again, anyone have any knowledge or first-hand experience with freezing of mortar lined ductile iron pipe - any impact to mortar?
thanks!
-pmover
RE: Mortar Lined Ductile Iron Pipe - Freeze Protection
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Mortar Lined Ductile Iron Pipe - Freeze Protection
RE: Mortar Lined Ductile Iron Pipe - Freeze Protection
rconner, sorry for any confusion and thanks for responding.
-pmover