DS-EN-1000 (07)
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17
16
Series 400 Stainless Steel Hose
Construction:
Helical / Standard Pitch
Material:
Hose: For 304, use 404; For 316L, use 416
Braid: 304L Stainless Steel
Characteristics: Medium Weight / Medium Flexibility
Helical Hose
Nom.
I.D.
(IN.)
Part
Number
Braid
Layers
Braid
Construction
Braid
Coverage
(%)
Nom.
O.D.
(IN.)
Maximum Pressure @70ºF(PSIG)
a
Centerline Bend
Radius (IN.)
Weight
per Foot
(LB.)
Dynamic
Static
Working
Test
Nominal Burst
1/4”
4xx-004
0
.43
180
270
----
----
----
0.07
4xx-1HHB-004
1
24 x 6 x .012
98
.50
1,987
2,980
7,950
5.00
1.00
0.15
4xx-2HHB-004
2
.58
3,125
4,687
12,500
----
----
0.23
3/8”
4xx-006
0
.59
100
150
----
----
----
0.11
4xx-1HHB-006
1
24 x 8 x .012
98
.66
1,750
2,800
7,000
5.50
1.00
0.21
4xx-2HHB-006
2
.74
2,800
4,200
11,200
----
----
0.32
1/2”
4xx-008
0
.73
80
120
----
----
----
0.15
4xx-1HHB-008
1
24 x 8 x .012
87
.80
1,100
1,650
4,400
6.50
1.50
0.25
4xx-2HHB-008
2
.87
1,760
2,640
7,040
----
----
0.35
3/4”
4xx-012
0
1.00
52
78
----
----
----
0.22
4xx-1HHB-012
1
36 x 8 x .012
91
1.07
825
1,237
3,300
8.00
1.50
0.37
4xx-2HHB-012
2
1.15
1,320
1,979
5,280
----
----
0.52
1”
4xx-016
0
1.28
30
45
----
----
----
0.27
4xx-1HHB-016
1
36 x 8 x .016
93
1.37
800
1,200
3,200
8.75
1.75
0.53
4xx-2HHB-016
2
1.46
1,280
1,920
5,120
----
----
0.80
a. Pressures listed have been reduced to account for welding as the method of attachment. Other methods such as brazing, neck-down
designs or crimping will result in different pressures. Contact the factory for details.
Technical Information
Selection Criteria
The selection of flexible metal hose for a particular application
is influenced by six primary considerations:
•
Temperature
•
Pressure
•
Media
•
Size
•
End Fittings
•
Motion
To make the best choice for a specific application, consider all
the relevant operating factors against the properties of the
various types of flexible metal hoses.
Temperature
The physical properties of any material varies with temperature.
Limits for operating temperature are affected by the working
pressure, the type of media being conveyed and the nature of
the application. By careful selection of material, it is possible
to provide flexible metal hose for a wide range of operating
temperatures. The choice of hose type, metal alloy, end fitting and
method of fitting attachment determines the temperature limit.
Pressure
The nominal pressure ratings of flexible metal hose varies
according to type, material and size. Specific pressure ratings for
each type of flexible metal hose are found in each section of this
catalog. Under actual working conditions, pressure is affected
by many other factors such as temperature, pulsating conditions
and bending stresses.
Media
The type of media being conveyed is an important consideration
in the selection process. Metal hose is subject to corrosion
by both the material flowing through it and the outside
environment. For almost all applications, a metal hose can be
selected that is resistant to the intended media. Since metal
hose is a thin-walled product, it will not have the same total life
as heavier walled tube or pipe of the same material.
For Corrosion Resistance of Materials to different environment,
refer to a chart posted on our web site:
http://www.penflex.com/corrosion
Size
The size of flexible metal hose is specified by the nominal
diameter. The existing piping will normally dictate the size of
the metal hose for a particular application. However, flow rate,
velocity and pressure drop considerations may also influence the
selection of the hose size.
End Fittings
The use of flexible metal hose is complimented by the extensive
range of end fittings that are available. Such end fittings may
be male or female pipe threads, unions, flanges, flared tube
fittings or other specially designed connectors. End fittings are
attached by welding, silver brazing, soldering and occasionally by
mechanical means, depending on the type of hose and the alloy.
For further detail on the appropriate type of end fitting please
consult your fabricating distributor.
Motion
Flexible metal hose is generally used in four types of
applications.
•
To correct problems of misalignment.
•
To provide flexibility in manual handling operations.
•
To compensate for regular or constant movement.
•
To absorb vibration.
In all types, careful hose selection, design of the assembly and
installation are important for optimal service life. The flexibility
of a hose is determined by its mechanical design and the
inherent flexibility of its material.