Stainless steel annular corrugated metallic flexible hoses are manufactured in austenitic steel ANSI 321, 316, 316L & 304 grades conforming to BS 6501, Part-1. The annular corrugated metallic hose body provided the flexibility and pressure tight core of the assembly. Highly flexible close –pitch hoses are manufactured for special applications
Braid :
When pressure is applied, unbraided hose tends to elongate axially; to restrain this, an external layer of SS wire braid is provided. The braid also makes the assembly pressure compatible.
Sometimes two or even three layers of braiding are provided for high pressure applications. The braiding is highly flexible and follows the movement of the hose. The braid is normally manufactured in SS 304 wire. However SS 316 and 321 braids can also be manufactured. We also supply wire braid in different configurations as per customer specifications.
Advantages of Stainless Corrugated bellow hoses :
-
High physical strength combined with light weight
-
Suitable for wide temperature range (-270° C to + 700°C)
-
Good corrosion resistance. Resistance to fire, moisture, abrasion and penetration.
-
Absorbs vibration and noise from pumps, compressors, engines etc.
-
Compensates for intermittent or constant movement.
-
Compensates for thermal expansion of contraction of piping.
-
Corrects problems of misalignment.
-
A flexible and quick alternative for rigid piping in difficult locations.
 |
 |
 |
| FIXED MALE (HEXAGON) HF01 | FEMALE SWIVEL NUT (UNION) TYPE HF02 | FIXED FEMALE TYPE HF03900 |
 |
 |
 |
| MALE UNION TYPE HF04 | FEMALE UNION TYPE HF05 | 900 ELBOW FEMALE SWIVEL TYPE HF06 |
 |
 |
 |
| PLAIN PIPE TYPE HF07 | WELDING PIPE (STUB) TYPE HF08 | THREADED PIPE TYPE HF09 |
 |
 |
 |
| CAMLOCK COUPLING TYPE HF10 | FIXED RF FLANGE TYPE HF11 | SWIVEL FLANGE WITH STUB END TYPE HF12 |
| Nominal Size DN | Without Braid | Single Braid | Double Braid | Minimum Bend Radius | |||||
| Max. Working Pressure | Test Pressure | Max. Working Pressure | Test Pressure | Max.. Working Pressure | Test Pressure | Static | Dynamic | ||
| Inch | mm | Kg/cm2 | Kg/cm2 | Kg/cm2 | Kg/cm2 | Kg/cm2 | Kg/cm2 | mm | mm |
| 1/4 | 6 | 4 | 6 | 100 | 150 | 160 | 240 | 25 | 100 |
| 3/8 | 10 | 4 | 6 | 90 | 135 | 144 | 216 | 40 | 150 |
| 1/2 | 12 | 3 | 4.5 | 80 | 120 | 128 | 192 | 50 | 200 |
| 5/8 | 16 | 3 | 4.5 | 70 | 105 | 112 | 168 | 50 | 200 |
| 3/4 | 20 | 2 | 3 | 64 | 96 | 102 | 153 | 70 | 200 |
| 1 | 25 | 2 | 3 | 50 | 75 | 80 | 120 | 90 | 200 |
| 1.1/4 | 32 | 1.5 | 2.3 | 40 | 60 | 64 | 96 | 110 | 250 |
| 1.1/2 | 40 | 1.5 | 2.3 | 30 | 45 | 48 | 72 | 130 | 250 |
| 2 | 50 | 1 | 1.5 | 28 | 42 | 44 | 66 | 175 | 350 |
| 2.1/2 | 65 | 1 | 1.5 | 24 | 36 | 38 | 57 | 200 | 410 |
| 3 | 80 | 1 | 1.5 | 18 | 27 | 28 | 42 | 205 | 450 |
| 4 | 100 | 0.8 | 1.2 | 16 | 24 | 26 | 39 | 230 | 560 |
| 5 | 125 | 0.6 | 0.9 | 12 | 18 | 20 | 30 | 280 | 660 |
| 6 | 150 | 0.6 | 0.9 | 10 | 15 | 16 | 24 | 320 | 815 |
| 8 | 200 | 0.5 | 0.75 | 8 | 12 | 12 | 18 | 435 | 1015 |
The above values apply only to braided hoses and assemblies at ambient temperature of 20 Deg Celsius. The burst pressure is 4 times of the max. working pressure.
Stainless Steel Corrugated Bellow hoses with SS Braiding are used for diluted or concentrated acids, alkalies, liquid ammonia, nitrogen, hydraulic oil, steam, air & water. These are suitable for high pressure and high temperature application and for corrosive conditions.
Constrution : Inner corrugation of SS 321 and outer wire braiding of SS 304
Working Pressure : Varies between 2300 psi for 1/4″ID to 90 psi for 8″ID
Size Range : 1/4″ ID to 8″ ID.
Temperature Range : – 196 Deg C to + 600 Deg C
Applications : Refineries , Power Plants , Steel Plants , Nuclear Installations, Fertilizer Industry, Pharmaceutical Industry, Cryogenic Services ,Chemical Industry , Boilers , Paper Plants , Lubrication Systems, Automotive Industry,Steam Hot water Pneumatic Services ,Vacuum Systems ,Air Conditioning & Refrigeration ,Ports & Ship Yards, Defense Industry, Piping, Vibration Absorption ,Railways.
In order to get satisfactory service and longer life from stainless steel flexible hose, the hoses assembly should be installed in the right manner. The sharp bending a hose assembly, particularly at the welded ends, stressed and twisted mounting and excessive fatigue are main causes of premature failure. See installation chart for correct and incorrect modes.
| INCORRECT | CORRECT |
 |
 |
| Dimension the hose adequately | Take care that the flexible length is not too short |
 |
 |
| Avoid excessive bending of the hose | Use pipe bends |
 |
 |
| Do not allow the hose to sag | Use a support |
 |
 |
| Do not move the hose obliquely to the installation plane | Movement should be along |
 |
 |
| Avoid torsional twist when fittings are not in line | Install in one plane only |
 |
 |
| Avoid torsion due to Angular movements | All movements should be only along the axis of the hose |