ASTM F1057-17
(Practice)Standard Practice for Estimating the Quality of Extruded Poly (Vinyl Chloride) (PVC) Pipe by the Heat Reversion Technique
Standard Practice for Estimating the Quality of Extruded Poly (Vinyl Chloride) (PVC) Pipe by the Heat Reversion Technique
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 unfused 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.
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.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Designation: F1057 − 17
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* 3. Apparatus
1.1 This practice covers a procedure for estimating the 3.1 Air Circulating Oven, thermostatically controlled, ca-
qualityofextrudedpoly(vinylchloride)(PVC)plasticpipesby
pable of operating at 180 6 5°C (356 6 9°F) and capable of
observing the reaction of pipe specimens after exposure to hot meeting the recovery requirement of 4.3. Additionally, the
air in the oven at 180 6 5°C for 30 min duration.
oven must have heat generation (power) capacity such that the
recovery achieved while at a constant oven set point. The air
1.2 This standard does not purport to address all of the
temperature with the oven (that is, the test temperature) is to be
safety problems, if any, associated with its use. It is the
monitored within 3 in. from the outer edge of the test
responsibility of the user of this standard to establish appro-
specimen; make assurances that the temperature does not
priate safety and health practices and determine the applica-
contact the test specimen.
bility of regulatory limitations prior to use.
1.3 This international standard was developed in accor-
NOTE 3—The oven should be vented to the outside of the building.
dance with internationally recognized principles on standard-
NOTE 4—Monitoring of the test temperature within the oven may
require a secondary temperature monitoring device in addition to the
ization established in the Decision on Principles for the
temperature monitoring device within the oven control system.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Procedure
Barriers to Trade (TBT) Committee.
4.1 Prepare specimens of pipe 150 mm (6 in.) long or longer
2. Significance and Use
with ends cut square so that they stand perpendicular on end
when placed in the oven.
2.1 This practice is applicable to distinguish between prop-
4.1.1 Cut staves from pipes whose size prevents insertion of
erly and improperly extruded PVC plastic pipe. It can be used
full round specimens in the oven. Prepare large-diameter pipe
to:
staves so that their lengths parallel to the pipe axis are 150 mm
2.1.1 Reveal incomplete exsiccation of compound before or
(6 in.) or longer.
during extrusion (Note 1),
2.1.2 Determine the presence of stress in the pipe wall
4.2 Examine the specimens and note any unusual features
produced by the extrusion process (Note 2),
such as discoloration, inclusions, or pinholes in the cut edge.
2.1.3 Determine whether unfused areas are present, and
4.3 Place the specimens of whole pipe in the preheated oven
2.1.4 Reveal contamination.
so that each specimen stands on end with sufficient separation
between them so that hot air can flow freely between the pipes.
NOTE 1—Residual moisture in the compound vaporizes at extrusion
temperatures and is normally evacuated as it forms vapor. Pockets of Place specimens of pipe staves on the floor of the preheated
moisture trapped in the pipe wall result from incomplete exsiccation of the
ovensothattheyrestontheirlongitudinaledgesandsothathot
compound, and may reduce the physical properties of the pipe.
air can flow freely around them. Record the time when the air
NOTE 2—Minor residual stress in the pipe will not impair field
in the oven directly adjacent to the test specimen recovers to
performance and handleability. High-residual stress has no proven effect
180°C (356°F). Recovery must occur within 15 min or less.
on performance, but may impair handleability during installation.
After an additional 30 min of exposure within the test
temperature tolerance of 180 6 5°C, remove the specimens,
taking care not to alter any heat effects.
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
4.4 Examine the specimens within 3 min after removal from
Methods.
the oven, while still hot. With a sharp knife, cut whole pipe
Current edition approved Feb. 15, 2017. Published April 2017. Originally
specimens lengthwise at approximately 60° circumferential
approved in 1987. Last previous edition approved in 2010 as F1057–10. DOI:
10.1520/F1057-17. intervals, resulting in six pipe staves of approximately equal
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harb
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F1057 − 10 F1057 − 17
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 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 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.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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 infusedunfused 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 Circulating Oven, 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
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 May 1, 2010Feb. 15, 2017. Published June 2010April 2017. Originally approved in 1987. Last previous edition approved in 20052010 as
F1057–87(2005).F1057–10. DOI: 10.1520/F1057-10.10.1520/F1057-17.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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F1057 − 17
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
ove
...
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