Flexible metal braided hoses and fittings can be used widely in systems like water, steam, hot oil and gas with their resistance to pressure and flexible structure.
Conducting liquids, compensating the problems originated from installation, absorbing vibrations and expansions are some of the metal hoses' usage purposes.
There are parallel, open and closed joint options and they can be reinforced against pressure and environmental conditions with double braiding.
OPERATING CONDITIONS
Operating Pressure
DN6-198 bar / DN200-10 bar
Operating Temperature
-200 +600 șC
Nominal Diameter
DN 6-200-1/4"-8"
MATERIAL FEATURES
Hose
AISI 316L Stainless Steel
Braiding Wire
AISI 304 Stainless Steel
Fittings
Carbon Steel
Areas of usage:
Iron & Steel Industry
Petroleum and gas plants
Chemistry industry
Heating and cooling systems
Food industry
Automotive industry
Paper production plants
Maritime industry
Defence industry
Moving systems
Any kind of depot and tank connections
At the ordering phase:
Diameter, length, connection type, connection material and environmental conditions should be indicated.
Cycle life:
Cycle life is the number that the hose reaches the point of initial motion position in a single direction motion.
Several factors affecting cycle life are listed below:
Incorrect Installation
Operating Pressure
Operating Temperature
Angle of Motion
Angle of Frequency
BOW HOSE
Flexible metal hoses can be produced with bow when required. Especially in moving systems, more force is applied to the point near connections. Reinforcement with a bow lenghtens cycle life of the hose by minimizing these forces. Additionally, increasing hose’s resistance to environment that are used in filling & emptying systems is one the advantages. Hoses in any diameter can be added bows.
JACKET HOSE
In some cases, the hose is needed to be heated in order to maintain the flow of the liquid (like fuel oil) inside. At these cases, another hose in a smaller diameter is produced inside the main hose which is conducting very hot water or steam in order to provide the main liquid’s flow. As can be seen on the picture, jacket hoses are designed specially to be used at these type of systems. They can be produced in several diameters and dimensions.
CONNECTION TYPES
COUPLING (FEMALE)
NIPPLE (MALE)
TURNING FLANGE
FIXED FLANGE
WELDING NECK
ELBOW
Dimensions
DN
Inner Diameter
Outer Diameter
PN 20 șC (bar)
Bend Radius
mm
inch
d
tol. (±)
d1
d2
tol. (±)
Unbraided
Braided
r static
r dynamic
6
1/4"
6,1
0,20
9,6
10,7
0,30
24
198
25
80
8
5/16"
8,2
12,1
13,6
17
176
35
125
10
3/8"
10,1
14,3
15,6
12
131
40
130
12
1/2"
12,2
16,8
18,3
0,35
9
93
45
140
16
5/8"
16,2
21,8
23,8
0,45
7
85
68
160
20
3/4"
20,3
26,6
28,4
4
56
70
170
25
1"
25,4
0,25
32,2
34,3
0,50
3
65
85
190
32
11/4"
34,3
41,1
42,9
2,5
44
105
260
40
11/2"
40,0
0,30
49,6
51,9
0,55
2,5
50
130
300
50
2"
50,5
0,40
60,5
62,4
0,60
1,6
35
160
320
65
21/2"
65,5
80,0
83,0
1,5
16
200
440
80
3"
80,4
0,45
97,0
100,0
1,5
16
205
550
100
4"
100,4
0,50
119,0
122,0
0,85
1,2
16
230
660
125
5"
125,2
0,65
146,2
150,0
0,9
16
580
760
150
6"
150,2
1,50
173,2
177,0
1,50
0,9
12,5
320
915
200
8"
200,0
2,50
227,0
232,0
2,50
0,7
10
435
1115
CORRECT
INCORRECT
CORRECT
INCORRECT
CORRECT
INCORRECT
CORRECT
INCORRECT
At the figures above, there are correct and incorrect installation types in some cases. Incorrect installation is the most important factor that shortens the hose’s cycle life.
Temperature Correction Factor
Temperature is one of the factors that reduces the hose’s resistance to pressure.
You can figure out of the material’s pressure resistance by multiplying it with the related temperature correction factor below.
Temp șC
-200
-150
-100
-50
0
20
50
100
150
200
250
300
350
400
500
600
700
Corr. Factor
1.0
1.0
1.0
1.0
1.0
1.0
0.92
0.83
0.75
0.69
0.65
0.61
0.58
0.56
0.53
0.34
0.10
INSTALLATION AND USE
OFFSET MOTION
a) ) Moving and is free to move out of line at neutral position.
b) Moving end is restricted to move only up and down when crossing the neutral position.
Offset Motion occurs when one end of the hose assembly is deflected in a plane perpendicular to the longitudinal axis with the ends remaining parallel. When the offset motion occurs to both sides of the hose centerline, use total travel in the formula:
i.e 2 x “K”
Formula (a)
Formula (b)
You can calculate the needed hose length for a specific ofset distance using the moduls above.
The offset distance “T” for constant flexing should never exceed 25 percent of the centerline bend radius “R”
If the difference between “L” and “Lp” is significant, exercise care at installation to avoid stress on hose and braid at the maximum offset distance.
Note: The appropriate formula must be used in order to calculate Needed Hose Length according to condition of the moving end.
ANGULAR MOTION
Angular Motion occurs when one end of a hose assembly is deflected in a simple bend with the ends not remaining parallel. You can calculate the hose length for angular motion using the modul below.
VERTICAL MOTION
This type of motion occurs when the center line of a hose assembly is bent in a circular arc and moves in a vertical direction. You can calculate the hose length and variation for vertical motion using the modul below.
HORIZONTAL MOTION
This type of motion occurs when the center line of a hose assembly is bent in a circular arc and moves in a horizontal direction. You can calculate the hose length and variation for horizontal motion using the modul below.
