Glass fused to Steel Tanks

[vij36]

Hi,
We are a charitable organization running mid-day meal program in India.
The foundation feeds school going children to encourage them going to schools and preventing drop-outs.
We are operating several kitchens as part of the program.

We are in need of ETP tanks for processing our kitchens waste water treatment.

We were building traditional RCC tanks however for upcoming kitchens we thought of exploring bolted tanks and came across this Glass Fused to Steel tanks.
However these GFS tanks are very expensive for low capacity but economical when the size goes beyond 500 CBM.

Is there any best alternative to GFS tanks and such availability in India.

Thanks,

 

[mk3223]

Since the posting is about the tank material & fabrication and the waster treatment process, may consider to post it in the Civil/Environ Eng'r/Waste Disposal & Treatment forum.

Good luck.

 

[EdStainless]

At one time glass lined residential waterheater tanks were common in the US (made by AO Smith).
These were in the 30-60 gal (120-240 liter) range.
I would presume that such tanks are still generally available.


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P.E. Metallurgy, Plymouth Tube

 

[MJCronin]

If the tanks are low pressure, and I assume low temperature, consider thin walled stainless steel or carbon steel with a premium epoxy coating.

"Glass lined" tanks and pressure vessels are useful where temperature will repeatedly go up and down (hot water heaters) or where there is extremely corrosive contents. These tanks were made by AO Smith (and others) and are expensive and fragile.

I believe that this would be expensive overkill for your Indian food waste ....

What is the volume of your tank and what is the maximum operating temperature and pressure ?

What else have you not you told us ?

MJCronin
Sr. Process Engineer

 

[Dhurjati Sen]

Dear vij36,

If you go for glass lined tanks, ensure those are manufactured and tested as per Shell DEP 30.48.70.30-Gen. GLASS-LINED STEEL PROCESS EQUIPMENT.

Regards.

DHURJATI SEN

https://www.nace.org/people/dhurjatisen

 

[vij36]

Hi Sen,

I have a sample with the below details:

Enamel thickness 150 micron
Steel thickness 3.2 mm
Steel tensile strength 700 newton/ Square mm

Will the Salt spry testing(ASTM B 117)is sufficient to test the corrosion.

Please let me know.

 

[btrueblood]

"Will the Salt spry testing(ASTM B 117)is sufficient to test the corrosion."

How would you inspect the interior after salt spray testing? I'm assuming this is a closed vessel. You may want to look at electrical (holiday) testing instead.

 

[vij36]

This is a open plate of dimensions 15 cm x 20 cm.

By visually can we identify whether the test has been passed or not ?

We will do holiday testing on tank once it is ready

 

[TugboatEng]

Perhaps by glass lined tank you are thinking of a fiberglass lined tank? Fiberglass can be adhered directly to the tank surface for much better protection than a painted on coating. A quick search also turned up a company that specializes in this.

https://www.dtfiberglass.com/fiberglass-tank-liners.html

 

[Dhurjati Sen]

Dear vij36,

The DEP talks about a High voltage test in accordance with ISO 2746 or EN 14430.

It does not talk about any salt spray test.

Regards.

DHURJATI SEN

https://www.nace.org/people/dhurjatisen