Concrete encasement of ductile iron pipe fire main
Concrete encasement of ductile iron pipe fire main
(OP)
Is there any recomendation against the concrete encasement of a fire main with working pressure of 10bar in ductile iron pipe? Shall I execute some special protection on the push-on joints and mechanical joints?
Thanks!
Thanks!





RE: Concrete encasement of ductile iron pipe fire main
RE: Concrete encasement of ductile iron pipe fire main
Be sure to consider proper thrust restraint, see "Thrust Restraint Design for Ductile Iron Pipe" from the Ductile Iron Pipe Research Association (DIPRA). Here is a link
http://www.dipra.org/pdf/thrustRestraint.pdf
For exterior corrosion protection of buried pipe, consider polyethylene encasement. See "Design of Ductile Iron Pipe"
http://www.dipra.org/pdf/designOfDIP.pdf
and
"Polyethylene Encasement Installation Guide"
http:/
www.SlideRuleEra.net
RE: Concrete encasement of ductile iron pipe fire main
RE: Concrete encasement of ductile iron pipe fire main
RE: Concrete encasement of ductile iron pipe fire main
Something sort of in between concrete encasement and soil embedment now available in some areas is "flowable fill", that is a poured or pumped sort of a lean mortar or concrete that claims ability to dig after cure but firmness practically better than many/most soils.
As far as mechanical vs push-on joints, both are well-proven joining concepts. However, the two most common brands of contemporary "push-on" joint seals (Tyton and Fastite) for ductile iron piping were invented in the 1950's (some decades after the old mechanical from the 1920's) as improvements to that older mechanical joining concept. While nothing is 100% trouble-free in universal practical application, I believe push-on or push-on restrained joints are in general even more reliable with current labor, as the field lubrication/bolting assembly/performance of mechanical joints is generally considerably more labor-intensive and labor-reliant than modern push-on styles.