ROCKDRILL / AIR, PNEUMATIC HOSE


SPECIFICATION :

IS :

446 / 1980

IS :

446 / 1968 covering both textile woven and braided constructions) or IS911


CONSTRUCTION:


Air Hose


Pneumatic Hose Lining :

Rubber lining free from porosity, airblisters and any other visible defects.

Rock Drill Hose Lining :

Rubber lining shall be resistant to oil mist.

Reinforcement :

Shall be either woven fabric well rubberized on both sides or braided textile reinforcement with yarn, natural or synthetic or combination of both.

Cover:

The outer cover shall be of high tensile abrasion resistant compound.

APPLICATION :

These hoses are used for various applications like general construction work, road building, tunneling in constructional jobs used with chipping, grinding and riveting appliances; in Service Stations for tyre inflation, for rock drilling applications in mines and quarries etc.



TYPES : There are 3 types of hoses


TYPE I :

Air hose for a working pressure 7 kgf/ cm²

TYPE II :

Pneumatic tool hose for a working pressure of 10 kgf/ cm²

TYPE III :

Rock Drill hose for a working pressure of 14 kgf / cm²


Availability Of Sizes & Reinforcement Recommendation

I.D inches Type I Type II Type III
Wov Br Wov Br Wov Br
5.0 2 ply 1 Br. 2 ply 1 Br. 3 ply 1 Br.
6.3 2 1 2 1 3 1
8.0 2 1 3 1 3 1
10.0 2 1 3 1 4 1
12.5 2 1 3 2 4 2
16.0 2 1 3 2 4 2
20.0 3 1 4 2 5 2
25.0 4 2 5 2 6 3
31.5 4 2 5 3 6 3
38.0 4 2 5 3 7 3
50.0 - - 6 3 - -


50 mm & above sizes in Type I, II, II, are supplied as per request.


TEST :

The hoses will undergo hydraulic test as per the following

TYPE I :

Air Hose : Minimum bursting pressure 28 kgf/ cm²

TYPE II :

Pneumatic Tool Hose : Minimum bursting pressure 40 kgf/ cm²

TYPE III :

Rock Drill Hose : Minimum bursting pressure of 56 kgf / cm²