WELD INSPECTION
The procedure for testing of hot-gas welds in plastic material has be established by American Society of
Testing Materials, and the Societies of Plastic Industries, and by self regulation of plastic fabricators.
Inspection and testing of plastic welds are divided into three general categories.
(a) Destructive
(b) Non-destructive
(c) Chemical
The strength of a plastic weld is dependent on a combination of these six (6) factors.
1. Strength of base material
2. Temperature and type of welding gas
3. Pressure on welding rod during weld
4. Type of weld
5. Preparation of material before weld
6. Skill of welder
Destructive Testing
Tensile- Strength Test
A section of the unit weld is cut out as a test specimen, and tested in accordance with American Society
of Testing Materials and Society of Plastic Industries testing procedures; see Section 7, Testing.