Negative oil price: Govt to hoard extra 1.1 lakh tonnes of oil

[Abu Shaleh Rumi]

China made 1000 bed hospital in 7 days. Can Pakistani or BD govt not make huge storage tanks from concrete in 15 days?

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No. Unfortunately!

 

[Haris Ali2140]

Does BD buys oil from US or Middle East???

 

[bluesky]

Prefabricated sure could do them in a week. Otherwise not possible

Cast-in-situ/cast in place heavy RC concrete wall is the only option to build oil tanks which takes time to construct. Oil or water gives tremendous horizontal pressure all over the wall. Water in a plastic bucket with a hole tends to get out through the hole. It is because of pressure.

For example, a 1.0 m circumference length of a tank with allowable water depth of 8.0 m takes a horizontal load equal to 1/2 x (0.0 m x 8.0 m) x 1.0 t/m3) equaling 4 ton/m of circumference that tends to tear the wall apart. For a 40 m diameter tank the total horizontal load is (3.14 x 40 m) x 4.0 ton equal to 502.4 ton.

So, there is no scope to prefabricate the tank wall piece by piece and join them at site. There will be leakages through the joints and the oil will leak out.

 

[Michael Corleone]

Cast-in-situ/cast in place heavy RC concrete wall is the only option to build oil tanks which takes time to construct. Oil or water gives tremendous horizontal pressure all over the wall. Water in a plastic bucket with a hole tends to get out through the hole. It is because of pressure.

For example, a 1.0 m circumference length of a tank with allowable water depth of 8.0 m takes a horizontal load equal to 1/2 x (0.0 m x 8.0 m) x 1.0 t/m3) equaling 4 ton/m of circumference that tends to tear the wall apart. For a 40 m diameter tank the total horizontal load is (3.14 x 40 m) x 4.0 ton equal to 502.4 ton.

So, there is no scope to prefabricate the tank wall piece by piece and join them at site. There will be leakages through the joints and the oil will leak out.

How are these tanks made? Aren’t they premade cylinders?
I re read your comment. Yes, they have to be one piece. Also I reckon resin lined as petroleum’s tends to seep through concrete?

 

[bluesky]

How are these tanks made? Aren’t they premade cylinders?
I re read your comment. Yes, they have to be one piece. Also I reckon resin lined as petroleum’s tends to seep through concrete?

Tanks are large diameter (Say, 30 - 50 m) cylindrical-shaped RC structures or it can definitely be made of steel plate with vertical beam supports @ say, 3.0 m as well as horizontal beams. However, whatever may be a structure made of, all the forces that tend to destroy it are taken into account when design engineers do stress analysis.

Generally speaking, the structure is designed and built to carry a load 1.5 times (Safety Factor (SF)=1.5) larger than the imposed loads. Piles may be used in soft land in BD whereby it is a single RC slab on top of many piles. But, in the case of countries like SA, it may be bench type circular grade beams below the tank wall, but without piles and the interior space inside the circle filled with sand or sandy soil compacted.

Many tanks are built in a single area and the tank yard is fully surrounded by retaining walls to stop oil flowing out in an accident. There are also separate walls with holes behind which fire brigade staff can safely pump foam/water in case of emergency.

Please note that for a 8 m high tank the vertical load is 8 t/m2 (only for oil/water and not other loads) on the soil. BD soil may not bear more than 4 t/m2. Horizontal wind load is not that much but the horizontal component of earthquake load is too high, may by 25% of the total dead and live loads depending upon the intensity of earthquake.

A design engineer considers all these destabilizing factors. I have noted you have quite a knack in civil engineering. May be you could have done also good had you studied engineering and worked in a developed country to gain experience.

 

[Michael Corleone]

Tanks are large diameter (Say, 30 - 50 m) cylindrical-shaped Reinforced Concrete structures. It can also be made of steel plate with vertical beam supports @ say, 3.0 m as well as horizontal beams. However, whatever may be a structure made of, all the forces that tend to destroy it are taken into account when design engineers do stress analysis.

Generally speaking, the structure is designed and built to carry a load 1.5 times (Safety Factor (SF)=1.5) larger than the imposed loads. Piles may be used in soft land in BD whereby it is a single RC slab on top of many piles. But, in the case of countries like SA, it may be bench type circular grade beams below the tank wall, but without piles and the interior space inside the circle filled with sand or sandy soil compacted.

Many tanks are built in a single area and the tank yard is fully surrounded by retaining walls to stop oil flowing out in an accident. There are also separate walls with holes behind which fire brigade staff can safely pump foam/water in case of emergency.

Please note that for a 8 m high tank the vertical load is 8 t/m2 (only for oil/water and not other loads) on the soil. BD soil may not bear more than 4 t/m2. Horizontal wind load is not that much but the horizontal component of earthquake load is too high, may by 25% of the total dead and live loads depending upon the intensity of earthquake.

A design engineer considers all these destabilizing factors. I have noted you have quite a knack in civil engineering. May be you could have done also good had you studied engineering and worked in a developed country to gain experience.

This is interesting to learn from you. Thank you! I would have taken up engineering had my eyesight not deteriorated, would have been cool to pursue aeronautics while in BAF academy... ah well