Page 6 - CorrugatedCatalog110913Rev8LR

Tube
The manufacturing process of corrugated metal hose starts with a stainless steel strip that is
rolled and the edges welded together to form a thin-walled, gas-tight tube. Hose Master offers:
Hose
After the tube has been welded, corrugations are formed into the tube to make it fexible. There are
two corrugation profles, annular and helical.
Corrugations are formed into the tube either mechanically or hydraulically (Hydroforming)
Annular Profle
Independent corrugations,
straight and parallel
Helical Profle
One continuous corrugation
that spirals around the hose
Hydroformed
Evenly distributed stresses
Mechanically Formed
Concentrated stresses
Hydroforming enhances fexibility and cycle life, maintains wall thickness, reduces concentrated
residual stress, and minimizes work hardening. Hydroforming is a clean process, using water
to form the hose, while most other processes require lubrication.
CORRUGATION PROCESS for Extraflex and Hydraflex Products
In addition to our line of annular, corrugated hose, Hose Master offers two helical hoses that are
specially designed to maximize performance without the drawbacks of traditional, mechanically-formed
helical hose. Rather than welding a tube and mechanically forming the corrugation, these products are
made from a stainless steel strip that is formed before welding. Because it is not mechanically formed
from a tube, this hose is extremely fexible and does not contain the residual stresses found in traditional
mechanically-formed helical hose.
Extrafex Profle Hydrafex Profle
Both Extrafex and Hydrafex are made by pre-forming the stainless steel strip, overlapping the
material, and continuously resistance-welding the seam together. While Extrafex is made with
one ply of stainless steel, Hydrafex is made with two plies for higher pressure ratings.
High quality steel strip Rolled steel to form a tube Strong, clean, non-oxidized
seam weld
CORRUGATED HOSE Process
5
Hydroformed Corrugation Process
800 - 221 - 2319 • www. hosemas t e r. com