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Standard Practice for Estimating the Quality of Extruded Poly (Vinyl Chloride) (PVC) Pipe by the Heat Reversion Technique
Automaticky preložený názov:
Štandardné praktiky pre odhad kvality z extrudovaného poly (vinylchloridu) (PVC) Pipe tepelným Reverzia Technika
NORMA vydaná dňa 1.5.2010
Označenie normy: ASTM F1057-10
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.5.2010
Kód tovaru: NS-48963
Počet strán: 7
Približná hmotnosť: 21 g (0.05 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
heat reversion, PVC pipe, Extrusions, Heating tests--plastics, Heat reversion technique, Poly(vinyl chloride)(PVC) pipe--specifications, ICS Number Code 23.040.20 (Plastic pipes)
Significance and Use |
This practice is applicable to distinguish between properly and improperly extruded PVC plastic pipe. It can be used to: Reveal incomplete exsiccation of compound before or during extrusion (Note 1), Determine the presence of stress in the pipe wall produced by the extrusion process (Note 2), Determine whether infused areas are present, and Reveal contamination. Note 1—Residual moisture in the compound vaporizes at extrusion temperatures and is normally evacuated as it forms vapor. Pockets of moisture trapped in the pipe wall result from incomplete exsiccation of the compound, and may reduce the physical properties of the pipe. Note 2—Minor residual stress in the pipe will not impair field performance and handleability. High-residual stress has no proven effect on performance, but may impair handleability during installation. |
1. Scope |
1.1 This practice covers a procedure for estimating the quality of extruded poly (vinyl chloride) (PVC) plastic pipes by observing the reaction of pipe specimens after exposure to hot air in the oven at 180 ± 5°C for 30 min duration. 1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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