Tank supports

Four common tank support designs are shown in Exhibits 15-29 through 15-32. The civil engineer is responsible for determining the most cost-ejfective design, on the basis of available data about soil condi- 

A concrete ring wall is shown in Exhibit 15-29- The tank is supponed by Class I compaaed struaural fill as well as a ring wall that is 12 in (0.300 m) thick. 

Compaaed granular fill support is shown in Exhibit 15-30. The top of the tank berm is 3 ft (0.900 m) wide, slightly sloped away from the tank wall, and coated with asphaltic concrete for weather protection. 

A low-temperature tank foundation design is shown in Exhibit 15-31. This particular design emplo a concrete slab supponed by columns, providing an air space under the slab. This air space helps raise the temperature of the slab during a failure in the primary tank. 

EXHIBIT 15-31 Low-Temperature Tank Foundation with Elevated Concrete Base 

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For example, if the application is actually 800 psi, you would pressurize the barrier tank support system and the area between the two seals at 400 psi. This way the inboard seal would seal 400 psi (800 - 400 = 400 psi) and the outboard seal would also seal 400 psi (400 - 0 = 400 psi). Each seal independently could seal maybe 500 psi, but not 800 psi. Together, the two seals in this tandem arrangement ean seal 800 psi and higher depending on the barrier tank pressure. 

Horizontal cylindrical tanks should be installed on brick or reinforced concrete cradles with a downward slope of 1 in 50 from the draw-off end towards the drain valve, as shown in Figure 18.1. Cradles should be constructed on foundations adequate for the load being supported and the type of soil. A reinforced concrete raft equal to the plan area of the tank, and of adequate thickness to bear the load, is normally suitable for all but the weakest soils. Cradles should not be placed under joints or seams of the tank plates and a layer of bituminized felt should be interposed between the cradle and tank. The height of the tank supports should provide at least 450 mm space between the drain valve and ground level to allow access for painting or draining the tank. 

Where overfilling or leakage from the tank would contribute to a fire hazard, cause damage to property or contaminate drains or sewers, a bund wall should be constructed around the tank. This should be of brick or concrete with an oil-tight lining, and sealed to the concrete base under the tank supports. The capacity of the bunded area should be at least 10 per cent greater than that of the storage tanks contained within it. 

Fiberglass main cryogen tank support straps (9)... 

Inspect water level and condition of water. Inspect exterior of tank, support structure, vents. Quarterly... 

UL 142-listed construction for tire primary tank, outer containment, associated tank supports or skids. 

Always Secure Compressed Gas Tanks. A compressed gas tank should never be allowed to stand free. Instead, it should be supported by an approved tank support and the screws should be tightened by a wrench, not just by hand. If lying horizontal, the compressed gas tank should be prevented from rolling. 

Liquid color are shipped in various sizes of containers. Small samples are sent in 1-qt to 1-gal collapsible containers (Hedpack). More common containers are 5-gal pails, 30-gal drums, and 55-gal drums. For really long runs, reusable totes are available. All-steel or all-aluminum totes are widely used, and totes that consist of a polyethylene tank supported by a cage of steel rod are becoming more popular. Totes are particularly efficient for large-volume colors, often black or white. The tote can be returned and refilled with the same color, reducing the chance of cross-contamination. 

The models were placed on a table beyond the tank, supported by blocks at the aijpropriate height. Hy moving the models nearer to or further from the observer and by adopting different viewing positions, ranges up to 40 miles could be accurately simulated. 

Steel-tank Supports. The de.sign of the foundation for a steel tank depends upon the type and design of the tank, which in turn depends... 

Vertical Tank Supports. In order to provide for variations in length or movement of the tank owing to change in temperature, or if storage floor area is limited, vertical tanks may be used with supporting lugs located in the mid-section area, permitting expansion to take place both... 

The stratification test program described here utilized a 70-ft vacuum-jacketed test vessel. The test vessel was a 4-ft-diameter x 6-ft-long stainless steel inner tank supported within a 6-ft-diameter outer tank by means of four legs, several tie rods, and a sway bar. The inner tank was designed for a working pressure of ISOpsig at liquid-hydrogen temperature. Its upper and lower domes w ere insulated with 1 in. of multilayer insulation to minimize inadvertent heat leak to the test fluid. Removal of the outer tank dome (Fig. 2) provides ready access to the inner tank. A 14-in. manhole in the upper dome of the inner tank provides access to the tank interior. 

If necessary, remove 2 fuel tank fixing null strips, there are four holts totally, one holt on the fuel tank urotection plate, remove the sealing ruhher along the fuel tank, the fuel tank, fuel tank support board and the fuel tank protection plate can be removed. 

Supports, foundations, and anchorage for all tank locations— (i) General. Tank supports shall be installed on firm foundations. Tank supports shall be of concrete, masonry, or protected steel. Single wood timber supports (not cribbing) laid horizontally may be used for outside aboveground tanks if not more than 12 inches (30.48 cm) high at their lowest point. 

A tank platoon, including a section of three flame tanks, was placed in support of an infantry battalion. Flame tank deployment differed within these tank-infantry teams. Sometimes they operated alone with the infantry sometimes they formed an integral part of the tank platoon most frequently they waited at forward positions until called upon for particular missions by the tank platoon. When the latter tactic was used the flame tanks, supported by conventional tanks, operated ahead of the infantry until an area had been cleared for the latter s advance. The troops followed closely, protecting the tanks and occupying the ground before the enemy could recover. This support was extended to both Army and Marine divisions. ... 

As a matter of fact, comparatively little use was made of the E4-3 in France and Germany. Unfortunately, the first reported action was a complete failure, a circumstance which may have helped discourage wider use of the weapon. Two medium tanks with E4-3 flame throwers reported to the y4ist Tank Battalion, First Army, on 13 September 1944. At the time, both tanks were improperly equipped and one had a defective engine. The y4ist Tank Battalion repaired and equipped the vehicles and attached them to Company C. When further trouble developed, one of the tanks was evacuated to an ordnance repair shop. On 18 September, the remaining E4-3 flame tank supported an infantry attack on an enemy pillbox. Because of inadequate pressure the tank had to get within twenty-five yards of the fortification before the flame could reach the embrasure. This action failed to reduce the pillbox, and the infantry did not take the position. In fact, there was doubt whether or not the enemy suffered any casualties from the attack. 

Biological shielding blocks are mounted on the tank cover as well as at the level of the top end of the tank supporting frame. 

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