Page 11 - StripwoundCatalog100419 Rev1_Layout 1

Compressed Length (C)
Relaxed Length (R)
Extended Length (E)
C
R
E
R E C
Measuring Various Hose States
The Relaxation Factor is defined as Extended Length (E) divided by Relaxed Length (R) and is used to
facilitate ordering interlocked hose. Hose Master can provide the Relaxation Factor for each of our interlocked
hose products.
Interlocked metal hose is generally priced and defined in its extended state. Frequently, the hose designer
thinks in terms of the relaxed state. This is especially true when using smoothbore hose, packed hose, and
calculating assembly length. In these cases, the purchaser must define the state (relaxed) when placing an
order, OR multiply the desired (relaxed) length by its Relaxation Factor to order it as an extended length.
Example: For a hose with a relaxation factor of 1.12
To obtain a 20-foot relaxed length of hose, it can be ordered as 22.4 feet of extended product (20’ x 1.12).
Additionally, if this extended length of hose weighs 3 lbs. per foot, and costs $4.00 per foot, then in the relaxed
state it will weigh 3.36 lbs. per foot (3 lbs. per foot x 1.12) and it will cost $4.48 per foot ($4.00 per foot x 1.12).
Figure 1
Figure 2
Figure 3
Various States of Hose Length
Interlocked metal hose can be Compressed (Figure 1) and Extended (Figure 3), and it is this ability that allows
the hose to bend. The Relaxed Length ( R) is defined as the average between the Extended Length (E) and the
Compressed Length (C ) of the hose (Figure 2), and is calculated as R =1/2 (C+E). When interlocked hose is
bent as far as it can go, the outside surface of the hose is in the Extended state, while the inside surface is in
the Compressed state.
800-221-2319 • www.hosemas ter. com
ASSEMBLY LENGTH
10