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SURAKSHA PRODUCTS PVT.LTD.
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• QUALITY TESTING
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Quality Testing
 
Control and Testing

  • IN-PROCESS QUALITY CONTROL CHECKS N-PROCESS QUALITY CONTROL CHECKS

  • QUALITY CONTROL TESTING CHART
    UALITY CONTROL TESTING CHART
IN-PROCESS QUALITY CONTROL CHECKS
S.NO. STAGE CHECKING PARAMETERS
1. MANDREL* Mandrel OD
2. TUBE EXTRUSION* Tube OD, Eccentricity,Cooling water temperature
3. WIRE WINDING* No. of Ends, Wire Diameter
4. BRAIDING* Braid OD, Pitch
5. COVER EXTRUSION* Cover OD, Eccentricity,Cooling water temperature
6. WRAPPING* Brand Marking , Wrapping pitch
7. VULCANISATION Temperature, Steam Pressure , Duration
*Visual Inspection for any finish/physical deformation or irregularity.

 
QUALITY CONTROL TESTING CHART
 
Rubber Compound
       
SL NO PROPERTIES NO. OF
SPECIMENS
FREQUENCY
       
1. Rheological Properties 1 100%, every batch
2. Hardness 1 100%, every batch
3. Tensile strength and
elongation at break
3 Every 5th batch
4. Specific gravity 1 100%, every batch
5. Accelerated ageing 1 Once a week
       
Brass Coated Steel Wire  
       
1. Visual Inspection Random Every consignment
2. Diameter 5 Every consignment
3. Cast diameter 5 Every consignment
4. Breaking strength 3 Every consignment
5. Knot test 2 Every consignment
6. Weight/meter 2 Every consignment
       
Finished Product    
       
1. Visual inspection Every length Each control unit
2. Dimensions 6 Each control unit
3. Adhesion test 2 Each control unit
4. Flexibility of hose 3 Each control unit
5. Proof pressure test Each hose Each control unit
6. Pneumatic test 15 Each control unit
7. Bursting pressure test 1 Each control unit
8. Grip strength 1 Each control unit
9. Burning behaviour 1 Each control unit
10. Low temperature flexibility 1 Once a month
11. Ozone resistance 1 Once in six months
12. Resistance of lining to n-pentane 1 Each control unit
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