Extensible flexible metal hose with a heat treatment

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

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

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= 90×140 130×120 220×440 250×500 300×600 500×1000 750×1500 1000×2000
DN20-3/4″ МF, L= 90×140 130×120 220×440 250×500 300×600 500×1000 750×1500 1000×2000
DN25-1″ MF, L= 90×140 130×120 220×440 250×500 300×600 500×1000 750×1500 1000×2000