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.
When used a water or other fluids the extension flexible metal hose is made with white heat shrinkable cover or without heat shrinkable covering.
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.
|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|