Abstract: A pipe coupling for coupling together two pipes in a fluid-tight manner includes a tubular casing, a tubular sealing gasket located within the casing, and screws for tensioning the casing around the gasket. The casing includes an inner tubular casing and an outer tubular casing, both of metal. A layer of fire-resistant thermally-insulating material is disposed between the inner and outer casings to form a fire shield.

Abstract: A pipe coupling for connecting together two plain-ended pipes in a fluid-tight manner comprises an outer tubular casing, an inner tubular casing and a tubular sealing sleeve. The sealing sleeve has two sets of inwardly projecting ribs which, in use, are pressed into sealing engagement with the respective ends of the pipes. The inner and outer casings are longitudinally split and tensioning screws on the outer casing can be tightened to tighten the outer casing around the inner casing and the sealing sleeve. Frustoconical slots in the outer surfaces of the sealing sleeves receive frustoconical gripping rings which have gripping teeth on the inner sides which bite into the pipe surfaces to secure the pipes against axial displacement.