SS Corrugated Flexible Hose

SS Corrugated Flexible Hoses are generally selected where rubber or plastic hoses are not suitable. For example, permanent piping installations where flexibility is required, extreme high or low temperature applications and corrosive, combustible or toxic environments. A full range of metallic flexible hoses and hose assemblies are manufactured in austenitic steel are AISI 304,321,316 & 316L conforming to international quality standards. Stainless Steel Corrugated Metal hoses are suitable for a wide range of application in the steelmaking, chemical smelting, petrochemical, automotive, material handling and power generation industries and many more fields. Hydrofit Engineers is an SS Corrugated Flexible Hose Supplier in India.

Corrugated hoses can be used either unreinforced or unbraided, or with wire braid reinforcement depending upon the pressure rating and application. All assemblies are 100% tested prior to dispatch by pneumatic / Hydrostatic test as per customer requirement/specification.

The success of the flexible metallic hose assembly may be attributed to the fact that there is a hose suitable for almost every application. Hydrofit Engineers supply a comprehensive range of corrugated stainless steel hose projects covering a wide range of uses whatever the requirement of flexibility, media, environment, temperature or pressure. SS Corrugated Flexible Hose assemblies are supplied for industrial requirements in Chennai and across India.

Advantages of SS Corrugated Flexible Hose

Suitable for wide temperature range (-270°C to 600°C).
Resistant to thermal expansion & contraction in the piping system.
Higher strength.
Fire and moisture resistant.
Corrosion resistant, longer life.
High abrasion, penetration and damage resistant.
Flexible option for rigid piping in difficult locations.

SS Corrugated Flexible Hose Technical Data

All pressure values are in kg/cm² and bend radii are in mm.

Nominal bore (mm)	Static bend radius	Flexing bend radius	Without braid max. working	Without braid test	Single braid max. working	Single braid test	Double braid max. working	Double braid test
6	25	100	4	6	100	150	160	240
10	40	150	4	6	90	135	144	216
12	50	200	3	4.5	80	120	128	192
16	50	200	3	4.5	70	105	112	168
20	70	200	2	3	64	96	102	153
25	90	200	2	3	50	75	80	120
32	110	250	1.5	2.3	40	60	64	96
40	130	250	1.5	2.3	30	45	48	72
50	175	350	1.0	1.5	28	42	44	66
65	200	410	1.0	1.5	24	36	38	57
80	205	450	1.0	1.5	18	27	28	42
100	230	560	0.8	1.2	16	24	26	39
125	280	660	0.6	0.9	12	18	20	30
150	320	815	0.6	0.9	10	15	16	24
200	435	1015	0.5	0.75	8	12	12	18

Technical Notes

All above technical details are subject to change without notice.
All Stainless Steel Corrugated Flexible Hoses conform to BS 6501 Part-1.
Unless specified, braiding would be in high tensile stainless steel AISI 304 wire.
The above pressure ratings are for fluid at ambient temperature of 20°C.
Burst pressure is 4 times the working pressure.

Temperature Correction Factor

Where hoses are required to operate at temperatures above 20°C, a correction factor must be multiplied by the stated working pressure given to the selected hose.

The factors of stainless steel flexible hoses are given in the table alongside, and the following example shows how calculations are made for hoses required to operate at elevated temperatures.

Example

A 40mm bore stainless steel hose is required to convey fluid at a working pressure of 15 bar and a temperature of 300°C.

The Maximum Working Pressure at 20°C for single braid is 34 bar.

From the chart alongside, maximum working pressure at 300°C = 34 × 0.50 = 17.0 bar.

The hose selected is therefore suitable for application.

Note: The example’s 0.50 factor is reproduced from the catalogue. It does not match the 300°C correction factors in the table below, so the calculation should be verified before technical use.

Temperature Correction Factor Table

Temperature °C	Temperature °F	SS 321 (1.4541)	SS 316L & SS 304L (1.4404 & 1.4306)	Carbon Steel
-200 to -20	-328 to -4	1	1	1
-20 to 50	-4 to 122	1	1	1
50 to 100	122 to 212	0.96	0.94	0.91
100 to 150	212 to 302	0.92	0.90	0.83
150 to 200	302 to 392	0.88	0.86	0.74
200 to 250	392 to 482	0.84	0.82	0.66
250 to 300	482 to 572	0.80	0.78	0.59
300 to 350	572 to 662	0.76	0.74	0.54
350 to 400	662 to 752	0.72	0.70	0.52
400 to 450	752 to 842	0.66	0.66	–
450 to 500	842 to 932	0.60	0.60	–
500 to 550	932 to 1022	0.54	–	–
550 to 600	1022 to 1112	0.44	–	–
600 to 650	1112 to 1202	0.36	–	–

Testing of SS Corrugated Flexible Hose

Standard Leak Testing

Every corrugated hose assembly is leak tested prior to shipment. Standard testing consists of pressurizing the assembly with air and then submerging the entire assembly under water. This method is reliable and sufficient for the majority of applications.

Hydrostatic Testing

While the standard test is designed to detect leaks, hydrostatic testing is designed to test the assembly’s strength.

Testing of an assembly to its full permissible test pressure can be economically and accurately accomplished by filling the assembly with liquid while concurrently evacuating all air.

The assembly is then hydrostatically pressurized using high pressure pumps and the test pressure is maintained for a predetermined period of time.

Standard Hose End Fittings

The following standard end fitting configurations are illustrated in the catalogue:

90° Female Swept Elbow
Female Union (Nut/Nipple)
Camlock Fitting
Full Male Union
Full Female Union
Quick Release Coupling
Fixed Flange (RF)
Rotating Flange with Stub End
Fixed Male (Barrel or Hexagon)
Hygienic Fitting
Fixed Female (Hexagon)

Installation, Use & Precautions

In order to obtain long life and satisfactory service from stainless steel hose it should be installed in the correct manner.

The main cause of failure is fatigue in the convolutions and in order to minimise this hose should be installed as shown below.

It should be remembered that all flexible hoses have a limited life and when they are used in applications where dangerous chemicals or hot or inflammable fluids are passing through them, they should be examined and re-tested at regular intervals.

Many of our customers have found it advantageous, by means of planned maintenance, to replace hoses at regular intervals where used in arduous conditions.

The catalogue includes four installation diagrams showing correct and incorrect hose positioning and bending arrangements.

Applications of SS Corrugated Flexible Hoses

Refineries
Power Plants
Steel Plants
Nuclear Installation
Fertilizer Industry
Pharmaceutical Industry
Cryogenic Service
Chemical Industry
Boilers
Paper Plants
Lubrication Systems
Automotive Industry
Steam, Hot Water, Pneumatic Service
Vacuum Systems
Air Conditioning & Refrigeration
Ports and Ship Yard
Defence Organization
Piping
Vibration Absorption
Railways

SS Corrugated Flexible Hose Supplier in India

Hydrofit Engineers, Chennai, supplies SS Corrugated Flexible Hoses for industrial applications across India. Customers can contact us with their requirements for hose size, length, material grade, working pressure and end fittings.

Related products: SS Braided Teflon Hoses and Hydraulic Hoses. For enquiries, please contact Hydrofit Engineers.