Frangible Roof Definition

The concept of frangible roof only applies to flat bottom cone roof tanks with limited roof apex angle.

Frangible roof definition.

Frangible is a word that means easily broken. C one way to obtain a frangible joint is when the roof plates are welded to the compression ring with a 3mm seal weld only and when the roof plates are not fixed to any roof supporting structure. 4 2 api s tandard 653 tank roof to shell joint modification such as reinforcement of the joint attachment of handrail or other frangible joint area change. The reasoning behind present api design formulas is reviewed.

Considering the project above the roof thickness is 9 5 mm and aws recommends a minimum weld size of 3 16 4 8mm and also there is the platform structure which stiffens the roof. Holes through roof plates shall be repaired or replaced. Synonym discussion of frangible. In any case the reflected waves bouncing back and forth between the walls floor and roof produce a shock pressure loading on interior surfaces of the structure.

The requirements for frangible attachments of roofs as specified in api 650. However in the context of tanks the word has a specific meaning and is defined in the main tank construction standards bsen 14015 and api650. The contribution from the cover to the total shock impulse on other interior surfaces depends to a large degree on the. In such tanks the roof to shell joint is intended to fail in the event of overpressurization venting the tank and containing any remaining fluid.

Frangible bullets are typically made of non toxic metals and are frequently used on green ranges and outdoor ranges where lead abatement is a concern. This paper presents the results of an investigation into the frangible joint behavior of tanks designed to api 650 rules. A frangible roof joint for small diameter tanks wherein the joint forms a flexible gastight connection between the tank shell and the roof and comprises annular link means containing an annular plate having an inner edge corresponding to a first edge thereof and an outer edge corresponding to a second edge thereof sealingly secured at or adjacent the first edge to a rim of the tank shell the. How to use frangible in a sentence.

A frangible roof to shell attachment is designed to be weaker than either the weakest vertical joint in the shell or the shell to bottom connection see figure 7. 4 2 3 floating roofs 4 2 3 1 areas of roof plates and pontoons exhibiting cracks or punctures shall be repaired or the affected sections replaced. Frangible bullets are often used by shooters engaging in close quarter combat training to avoid ricochets. Targets are placed on steel backing plates that serve to completely fragment the bullet.

Frangible definition is readily or easily broken. Frangible definition easily broken.