Transcription of Chapter 8: Quality Control and Quality Assurance
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Chapter 8: Quality Control and Quality Assurance
8 ChapterLester H. Gabriel, , ControlandQuality AssuranceCHAPTER 8: Quality Control AND Quality ASSURANCEC ontrol of the Quality of the raw material to be used in the production of pipe is thefirst essential and necessary condition for compliance with the specified requirementsof the finished product. HDPE resins used to produce corrugated polyethylene pipemust be sampled, tested and approved for use to assure compliance with AASHTOand ASTM cell classification requirements. A resin vendor s certification characterizingthe material ( ; virgin material, etc.) and stating compliance with all requirementsmust accompany all raw material resins used in the manufacture of the pipe. Thepipe manufacturer s responsibility includes testing, randomly selected samples fromeach lot for verification of density (ASTM D 1505) and melt index (ASTM D 1238),tensile strength (ASTM D 638) and environmental stress crack resistance (ASTM D 1693, ASTM D 5397 or ASTM F 2136).
CHAPTER 8: QUALITY CONTROL AND QUALITY ASSURANCE Manufacturing Processes Resins used in the manufacture of corrugated HDPE profile wall …
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