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bell adapters which are like mechanical joint adapters but contain a stainless steel backup ring to maintain a positive seal against the mating flange [9]: 347 flange adapters which attach to a polyethylene pipe with butt fusion to stiffen a junction and allow another flanged pipe or fitting to be bolted on [ 9 ] : 341
The lighter Mark I APSV shell was capable of penetrating 88 mm of armour at 450 m at a 30-degree angle of impact. [2] In 1942, US Ordnance tested the Littlejohn adaptor in an attempt to develop a taper bore adaptor for the 37 mm Gun M3. The adaptor distorted after a few shots. [3]
The 100 mm (4-inch) and 125 mm (5-inch) Storz couplers have been specified in NFPA 1963, Standard for Fire Hose Connections, since the 1993 edition. U.S. cities that have fire hydrants with 125 mm Storz connectors include Raleigh, NC [ 5 ] and the City of Corvallis, OR (adapter on 4-inch threaded outlet).
These sizing schemes allow for universal adaptation of transitional fittings. For instance, 1/2" PeX tubing is the same size as 1/2" copper tubing. 1/2" PVC on the other hand is not the same size as 1/2" tubing, and therefore requires either a threaded male or female adapter to connect them.
British Standard Pipe (BSP) is a set of technical standards for screw threads that has been adopted internationally for interconnecting and sealing pipes and fittings by mating an external thread with an internal (female) thread.
Threads for caps and taps are standardized to some degree, with many European designs being based on various DIN standard sizes. Some common thread diameters on European water canisters are 40 mm, 45 mm, 50 mm and 60 mm. [citation needed] A tap can either be an integrated part of the container (for example protected by a ridge) or an accessory.