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Storz size Lug diameter, inner face (mm) Hose diameter, internal (mm) Standard Fire-fighting usage 25 37 25 AS2419.4 Australia 32 44 32 38 52
In the United Kingdom, after two significant construction fires which resulted in a combined loss of £1,500 million, The Joint Code of Practice was introduced by the Fire Protection Association (FPA), the UK's national fire safety organisation, [1] to prevent fires on buildings undergoing construction work.
Modern replica of a fire piston made from cocobolo. Fire pistons in Southeast Asia were variously constructed of bamboo, wood, metal, ivory, bone, and horn. The main tube was typically around 3.25 in (8.3 cm) long and 0.5 in (1.3 cm) in diameter, with a bore size around 0.375 in (0.95 cm). [7]
Outdoors, it attaches either to a fire engine, fire hydrant, or a portable fire pump. [ 1 ] Indoors, it can permanently attach to a building's standpipe or plumbing system. The usual working pressure of a firehose can vary between 8 and 20 bar (800 and 2,000 kPa ; 116 and 290 psi ) while per the NFPA 1961 Fire Hose Standard, its bursting ...
Nylon 6 or polycaprolactam is a polymer, in particular semicrystalline polyamide. Unlike most other nylons , nylon 6 is not a condensation polymer , but instead is formed by ring-opening polymerization ; this makes it a special case in the comparison between condensation and addition polymers .
50 mm (2 in) 75 mm (3 in) The most popular webbing width is 25 mm (1 in) [2] but 38 mm (1.5 in) and 50 mm (2 in) are also very common. Narrower webbing is frequently looped through chock stones, which are jammed into cracks as safety anchors. In other cases, webbing is looped over rock outcroppings.
The Type 98 was able to fire at least three different types of projectiles: a finned Bangalore Torpedo and two kinds of stick bombs. The stick bombs were composed of a 48 mm (1.9 in) diameter hardwood stick that fitted into the barrel of the launcher and was reinforced with a metal cap at the bottom to withstand the stress of firing.
Nylon 11 is seen to have increased dimensional stability in the presence of moisture due to its low concentration of amides. Nylon 11 experiences 0.2-0.5% length variation and 1.9% weight variation after 25 weeks of submersion in water in comparison to 2.2-2.7% elongation variation and 9.5% weight variation for Nylon 6. [2]
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