ASTM F1057-10

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An American National Standard
Designation:F1057–87 (Reapproved 2005) Designation:F1057–10
Standard Practice for
Estimating the Quality of Extruded Poly (Vinyl Chloride)
1
(PVC) Pipe by the Heat Reversion Technique
This standard is issued under the fixed designation F1057; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1This 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 heat.
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 6 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.
2. Significance and Use
2.1 This practice is applicable to distinguish between properly and improperly extruded PVC plastic pipe. It can be used to:
2.1.1 Reveal incomplete exsiccation of compound before or during extrusion (Note 1),
2.1.2 Determine the presence of stress in the pipe wall produced by the extrusion process (Note 2),
2.1.3 Determine whether infused areas are present, and
2.1.4 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.
3. Apparatus
3.1 Air Oven, thermostatically controlled, capable of operating at 180 6 5°C (356 6 9°F) such that after insertion of the
specimen to be tested the test temperature is regained within 15 min or less. , thermostatically controlled, capable of operating at
180 6 5°C (356 6 9°F) and capable of meeting the recovery requirement of 4.3.Additionally, the oven must have heat generation
(power) capacity such that the recovery achieved while at a constant oven set point. The air temperature with the oven (that is,
the test temperature) is to be monitored within 3 in. from the outer edge of the test specimen; make assurances that the temperature
does not contact the test specimen.
NOTE 3—The oven should be vented to the outside of the building.
NOTE 4—Monitoring of the test temperature within the oven may require a secondary temperature monitoring device in addition to the temperature
monitoring device within the oven control system.
4. Procedure
4.1 Prepare specimens of pipe 150 mm (6 in.) long or longer with ends cut square so that they stand perpendicular on end when
placed in the oven.
4.1.1 Cut staves from pipes whose size prevents insertion of full round specimens in the oven. Prepare large-diameter pipe
staves so that their lengths parallel to the pipe axis are 150 mm (6 in.) or longer.
4.2 Examine the specimens and note any unusual features such as discoloration, inclusions, or pinholes in the cut edge.
4.3 Place the specimens of whole pipe in the preheated oven so that each specimen stands on end with sufficient separation
between them so that hot air can flow freely between the pipes. Place specimens of pipe staves on the floor of the preheated oven
so that they rest on their longitudinal edges and so that hot air can flow freely around them. Record the time when the air in the
oven directly adjacent to the test specimen recovers to 180°C (356°F). Recovery must occur within 15 min or less. After an
1
This practice is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.40 on Test Methods.
Current edition approved AugustMay 1, 2005.2010. Published August 2005.June 2010. Originally approved in 1987. Last previous edition approved in 20002005 as
F1057–87(20005). DOI: 10.1520/F1057-87R05.10.1520/F1057-10.
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