Quality Control

All materials and equipment are assessed throughout the production process, and their defects are corrected. The degree of particles fusion is a major feature in pipes and fitting production.

During the production under favorable circumstances, the polymer melt amalgamates the particles; however, under unfavorable circumstances, this amalgamation does not proceed well, and the produced part will be weakened and deformed. Another feature that is of special importance is the burst pressure test.

To this end, the primary materials will be tested upon delivery to the factory; they will enter the production lines only when qualitatively certified. The quality control inspector will eliminate defective products and do not allow their entry into the market.

Final Product Test and Inspection
Sisplast Co. performs the following tests and inspections on the final products in accordance with National Standards nos. 13361-2, 9119, and 9118 for PVC and the Standard no. 14427-2 for PE.

1. PVC Pipe Tests
Resistance to dichloromethane
Maximum wall thickness
Heat longitudinal reversion
Hydrostatic pressure
Vicat softening temperature
Impact strength
Appearance
Labeling
Dimensions (in mm)
Mean wall thickness
Minimum wall thickness
Body paint

2. PE Pipe Tests
MFI in g/10min
Percentage of pipe thermal reversion
Appearance
Soot dispersion
Burst type
Labeling
Density of pipes
Hydrostatic pressure
Mean wall thickness
Minimum wall thickness
Effects of pipes on water
Density of polymers