Torpedo casing
A torpedo casing was the outer shell of a torpedo, such as that used to encase a photon torpedo. 
Starfleet's Mark VI photon torpedo casing was described as cylindrical in shape, measured 2 meters in length, and was constructed of terminium. ()

After searching the wreckage of a Xindi-Insectoid starship in the Delphic Expanse in 2153, the landing party from  discovered in the ship's armory, several particle weapons and torpedo casings. ()

When  was raided by the alien thief , he removed "five tricorders, three phaser rifles, a couple of photon torpedo casings, two antimatter injectors, a month's supply of emergency rations." Tom Paris considered the lot to be "no great loss." ()

Alternate uses 
In Starfleet, during the 22nd, 23rd, and 24th centuries, it was traditional to place the bodies of dead crewmates in the empty casing of a torpedo, much like a coffin, before launching or beaming them out into space. These coffins were often draped in the Flag of the Federation. (; , ; ; ,   ) They were sometimes referred to as "pods". ()

Following the death of 's Lyndsay Ballard, she was buried in space and later discovered by the Kobali. After they reanimated her, she didn't believe believe that she had actually died until they showed her visual scans of her own corpse lying in the torpedo casing she was buried in. ()

See also 
 Probe casing

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