Berthing Pile - Cooking Oil
Berthing Pile - Cooking Oil
(OP)
Hi Everyone,
We are currently designing a berthing pile, constructed from a 1016 x 25.4 thick steel pile. As-constructed drawings for a previous installation for this client specifies 40 litres of cooking oil be poured into the pile after installation and then sealed with a HD Galvansed 2" BSP air tight plug flush.
I don't understand the reason for the cooking oil (presumably some type of corrosion protection?) or any guideline / specification that specifies cooking oil for berthing piles / steel piles.
Is anyone able to provide some further advice on why it is or should be provided?
Thanks,
Luke
We are currently designing a berthing pile, constructed from a 1016 x 25.4 thick steel pile. As-constructed drawings for a previous installation for this client specifies 40 litres of cooking oil be poured into the pile after installation and then sealed with a HD Galvansed 2" BSP air tight plug flush.
I don't understand the reason for the cooking oil (presumably some type of corrosion protection?) or any guideline / specification that specifies cooking oil for berthing piles / steel piles.
Is anyone able to provide some further advice on why it is or should be provided?
Thanks,
Luke





RE: Berthing Pile - Cooking Oil
maybe you better ask the client why this particular was specified in the past.
RE: Berthing Pile - Cooking Oil
TTFN
I can do absolutely anything. I'm an expert!
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Berthing Pile - Cooking Oil
RE: Berthing Pile - Cooking Oil
TTFN
I can do absolutely anything. I'm an expert!
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Berthing Pile - Cooking Oil
AS4997 Guidelines for the design of maritime structures specifies that hollow members should be sealed to prevent corrosion on the inside face. This is an open-ended steel pile which is embedded 15m into stiff clay. My thought is maybe the oil acts as some kind of seal/barrier to prevent salt entering the sealed void inside the pile.
RE: Berthing Pile - Cooking Oil
Cooking oil is a good lubricant over the short term because it wets metals well but in will create a varnish layer, with time, through reaction with air. Linseed oil is used as a varnish and oil-wetted rags are prone to spontaneous combustion due due to the oxidation reaction.
Also, corrosion is most severe at any air-water interface. Oil floats on water and will protect this ares most.
RE: Berthing Pile - Cooking Oil
from a environmental perspective the prescription also is remarkable. it may be so that the surface the pile is driven into may be clay, but that does not necessarily means that it is fully impermeable for a fluid. thus, some seepage may well occur and thus "oil" (be it "cooking oil" or mineral oil) will disappear into the environment.
RE: Berthing Pile - Cooking Oil
Cooking oil was used in preference to any other oil due to the fact that it would break down decompose over time, so any leakage or spillage during the top up operations would not cause a reportable oil spill.
I was told that it did work, but not as well as when they used diesel oil.
RE: Berthing Pile - Cooking Oil