The extensible flexible metal hose is made with closed pitch of the profile. Hoses of this type are subjected to heat treatment – a shiny annealing at a temperature of 1150°C under a nitrogen atmosphere to reduce the residual stresses in manufacturing. They are easily expanded and retain their shape after bending. Most often be used for natural gas with a nominal pressure up to 1 bar. The extending flexible metal hose for natural gas can be made with yellow heat shrinkable cover.
Extensible-flexible-metal-hose-with-yellow-heat-shrikable-cover
When used a water or other fluids the extension flexible metal hose is made with white heat shrinkable cover or without heat shrinkable covering.
Extensible-flexible-metal-hose-without-heat-shrinkable-cover
Material of the hose – AISI 316L stainless steel or AISI 304;
The ends of the hose are TIG welded nipple with a pipe thread Rp 1/2 “/ Rp 3/4″ / Rp 1 “(type M) and nut (type F) with a pipe thread G1/2″ / G 3/4″ / G1″.
Material of the fittings for natural gas (nipple, internal part, nut) – stainless steel AISI 304.
Material of the fittings for water (nipple, inside) – stainless steel AISI 304 (for the nut) – MS58 brass with a Ni coating.
Hoses are supplied with a gasket made of rubber or aluminum.
Standart types
| Symbol | Thread diameter | Inner diameter | Outer diameter | Profile pitch | Thickness | ||||||||||
| Size DN12 | R ½” (G ½”) | 12.7 mm | 17.7 mm | 3.6 mm | 0.20 mm | ||||||||||
| Size DN20 | R 3/4″ (G3/4″) | 18.8 mm | 24.9 mm | 4.4 mm | 0.20 mm | ||||||||||
| Size DN25 | R 1″ (G 1″) | 25.3 mm | 31.7 mm | 5.5 mm | 0.20 mm | ||||||||||
| Hose Type | Length of the hose (mm); | ||||||||||||||
| DN12-1/2″ MF, L= | 90×140 | 130×220 | 220×440 | 250×500 | 300×600 | 500×1000 | 750×1500 | 1000×2000 | |||||||
| DN20-3/4″ МF, L= | 90×140 | 130×220 | 220×440 | 250×500 | 300×600 | 500×1000 | 750×1500 | 1000×2000 | |||||||
| DN25-1″ MF, L= | 90×140 | 130×220 | 220×440 | 250×500 | 300×600 | 500×1000 | 750×1500 | 1000×2000 | |||||||