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QUALITY PROGRAMME

 

The responsibilities and authority of those in-charge of the quality system have been clearly established. These persons are independent from the pressure of production, and shall have access to top management.
Any change in raw materials and production related instructions are documented.
The minor deviation in performance characteristics of non-critical type are accepted provided other requirements of applicable specification are met with.

QUALITY CONTROL ACTIVITIES
The Q.C. Activities include :
a) Preparation of Documents : 
   - Preparation of guaranteed technical particulars 
   - Vendor rating 
   - Sampling Plans 
   - Production Instructions
b) Inspection and Testing of : 
    - Raw materials 
    - Production in Process 
   - Finished Products
c) Attend to : 
   - Complaints 
   - Inspection Agencies

DISPOSAL OF REJECTED MATERIALS
The rejected materials are sent by the production supervisor to the stores and the same are disposed off as scrap.

CHECK-ON QUALITY CONTROL EQUIPMENTS
The equipments are periodically checked and calibrated by independent labs.

PROCESS TO CHECK STAGE WISE:
Wire drawing stage 

a) Diameter & Surface of single wires
b) Tensile Strength & wrapping test for Aluminium
    Conductor
Annealing Stage
a) Percentage of Elongation test for copper
    conductor
b) Conductor resistance
Stranding Stage
a) Diameter & surface of each wire
b) No. of wires as per specification.
c) Lay ratio
d) Diameter of conductor after stranding Height &
    width if sector shape conductor
e) Resistance
PVC Insulation Stage

a) Thickness of insulation as per specification
b) Spark test
c) Physical check for core finish
Laid up stage
a) Direction of lay
b) Dia at laid up stage
c) Lay ratio
Inner Sheath Stage
a) Thickness on inner sheath
b) Diameter of cable over inner sheath
Armour Stage
a) Dimension / diameter of steel strips / steel wires
b) Direction of armouring
c) No. of wires / strips on cable
d) Diameter of cable over armour
Outer Sheath
a) Thickness of outer sheath
b) Overall diameter of cable
c) Embossing
d) Profile of cable

TESTS
Routine tests as specified in the relevant specification are carried out on all the drum lengths of cable leaving our works. Type tests and acceptance tests as specified are also carried out on random samples as and when necessary.
Every lot of cable leaving "PAWAN-CAB" works undergoes on the following test at the final stage of manufacture.

ROUTINE TEST
1. Conductor resistance test
2. High voltage test at room temperature

ACCEPTANCE TEST
1. Annealing test (for copper)
2. Tensile test (aluminium)
3. Wrapping test (for aluminium)
4. Conductor resistance test
5. Test for thickness of insulation and sheath
6. Tensile strength & elongation at break of
    insulation & sheath
7. Insulation resistance
8. High voltage test at room temperature

Type Test 
1. Test on conductor : 
    a) Annealing test (for copper) 
    b) Tensile test (aluminium) 
    c) Wrapping test (for aluminium) 
    d) Conductor resistance test
2. Test for armouring wires / strips
3. Test for thickness of insulation and sheath
4. Physical test for insulation and outer sheath 
    a) Tensile strength & elongation at break 
    b) Ageing in air oven 
    c) Shrinkage test 
    d) Hot deformation test 
    e) Loss of mass in air oven 
    f) Heat shock test 
    g) Thermal stability test
5. Insulation resistance test
6. High voltage test (water immersion test)
7. High voltage test at room temperature
8. Flammability test

FRLS CABLE
1. Oxygen index test                                  : ASTM D 2863-77 Min-29%
2. Temperature index test                           : ASTM D 2863-77 Min-250C
3. Smoke density test % of  light transmission : ASTM D 2843-77 Min-40%
4. Halogen acid gas  generation test              : IEC-754-1 Max. 20%  by wt.
5. Flammability test                                    : IEC-332 Min. sq.mm. should not effect from
  top
6. Swedish chimney method                         : SS:424-14-75 Class - F3 Min. 300 mm
  should not effect from top

PACKING : WOODEN DRUMS AS PER BIS SPECIFICATION