Corrosion of tube

[celtic]

Bit of a technical one, but...

We are based down in Western Australia, nearly all the work is coastal and often on jetty's and the likes.

What sort of life expectancy should we get out of standard galv tube being used over the water?

Is ally an option with the price of steel nowadays?

Cheers

 

[rumple]

Hello Celtic, I worked offshore for 20 years and some of our material was there from when we won the contract. It's all down to inspection really on a regular basis for galv or alloy. The uk work at height regulations now features a clause stating inspect for deterioration as some jobs are up for a long time. It's a risk assessment really but you could set parameters of changing it out every two to three years.

 

[celtic]

Rumple, thanks for the response.

we've had a job come back afetr 6-8months up in the spalsh zone on a jetty and the galv is all but gone from the kit.

Splash or tidal zone has a much larger effect on gear and we are in a warm water zone which may also push the galvanise to it's limit.

North Sea seems not to get corrosion happening, at this rate anyway.

We are looking for a way to chart the corrosion so the customer can see costs up front if the gear is trashed.

Cheers

Celtic

 

[rumple]

If I was in your shoes I would look the australian AS standard in comparison to EN39 first. From there I would catalogue the deterioration and present it to the client. This will end up in paying for the material or a strip and re- erect every six months. A potential win win situation.

 

[celtic]

Rumple,

have had a look at the 2 standards this morning, we will benchmark all kit onto such jobs in future, timescaled against expected corrosion based on the standard, location of the project and time.

Win-win does'nt happen much in this world!

cheers

Celtic