ASTM C390-08(2019)
(Practice)Standard Practice for Sampling and Acceptance of Thermal Insulation Lots
Standard Practice for Sampling and Acceptance of Thermal Insulation Lots
SIGNIFICANCE AND USE
4.1 The sampling and inspection prescribed in this practice afford the purchaser a practical level of quality assurance on incoming material. They are based on cost/risk relationships considered typical for preformed thermal insulations offered for general use. In all cases, the purchaser should review this practice and determine its suitability in terms of his specific needs.
4.2 This procedure is intended primarily for the inspection of a continuing stream of lots, and there is not a high probability of rejecting occasional off lots. Consumer protection is based on economic pressure on the producer, through greater risk of lot rejection, to maintain the process average at 90 % conformance or better. Operating characteristic curves for the sampling plans employed can be found in Practice E2234, Table X-C through Table X-F.
4.3 It is not the intent of this procedure to estimate lot quality, control the quality of production, relieve the supplier of responsibility for the quality of material offered, or determine the disposition of material found to be defective after receipt by the purchaser.
SCOPE
1.1 This practice covers criteria for establishing the acceptability of lots of shipments of preformed board, preformed block and pipe, and batts and blanket thermal insulation based on sampling and inspection.
1.2 This practice is intended for use in conjunction with appropriate ASTM material specifications that classify and describe the specific physical requirements for the product in terms of qualification requirements and inspection requirements. Determination of nonconformity shall be based on the tolerances for individual sample test values prescribed in the material specification.
1.3 This practice may require inspection substantially different from that performed in the normal course of production. If the purchaser requires sampling and acceptance inspection in accordance with this practice, he shall so specify in the order or contract.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 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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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.
Designation: C390 − 08 (Reapproved 2019)
Standard Practice for
1
Sampling and Acceptance of Thermal Insulation Lots
This standard is issued under the fixed designation C390; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This practice covers criteria for establishing the accept-
C168 Terminology Relating to Thermal Insulation
ability of lots of shipments of preformed board, preformed
E2234 Practice for Sampling a Stream of Product by Attri-
block and pipe, and batts and blanket thermal insulation based
butes Indexed by AQL
on sampling and inspection.
1.2 This practice is intended for use in conjunction with 3. Terminology
appropriate ASTM material specifications that classify and
3.1 Definitions—Definitions pertaining to thermal insulat-
describe the specific physical requirements for the product in
ing materials are defined in Terminology C168.
terms of qualification requirements and inspection require-
3.1.1 acceptable quality level (AQL)—when a continuous
ments. Determination of nonconformity shall be based on the
seriesoflotsisconsidered,thequalitylevelwhichforpurposes
tolerances for individual sample test values prescribed in the
of sampling inspection is the limit of a satisfactory process
material specification.
average. The listedAQL (AQL=10%) is the maximum percent
defectivelevelaccepted95%ofthetimebythesamplingplan.
1.3 This practice may require inspection substantially dif-
3.1.2 acceptance number—the maximum number of the
ferent from that performed in the normal course of production.
nonconformitiesornonconformingunitsinthesamplethatwill
Ifthepurchaserrequiressamplingandacceptanceinspectionin
permit acceptance of the inspected lot or batch.
accordancewiththispractice,heshallsospecifyintheorderor
3.1.3 inspection—the process of measuring, examining,
contract.
testing, gaging, or otherwise comparing the unit with the
1.4 The values stated in inch-pound units are to be regarded
applicable requirements.
as standard. The values given in parentheses are mathematical
3.1.4 inspection lot—a collection of units of product from
conversions to SI units that are provided for information only
which a sample is drawn and inspected to determine confor-
and are not considered standard.
mance with the acceptability criteria.
1.5 This standard does not purport to address all of the
3.1.4.1 Discussion—An inspection lot may differ from a lot
safety concerns, if any, associated with its use. It is the
defined for other purposes.
responsibility of the user of this standard to establish appro-
3.1.5 inspection, normal—inspection that is used in accor-
priate safety, health, and environmental practices and deter-
dance with an acceptance sampling scheme when a process is
mine the applicability of regulatory limitations prior to use.
considered to be operating at, or slightly better than, its
1.6 This international standard was developed in accor- acceptable quality level.
dance with internationally recognized principles on standard-
3.1.6 inspection, tightened—a feature of a sampling scheme
ization established in the Decision on Principles for the
using stricter acceptance criteria than those used in normal
Development of International Standards, Guides and Recom-
inspection. Tightened inspection is used in some sampling
mendations issued by the World Trade Organization Technical
schemes as a protective measure to increase the probability of
Barriers to Trade (TBT) Committee.
rejecting lots when experience shows the level of submitted
quality has deteriorated significantly.
3.1.6.1 Discussion—It is expected that the higher rate of
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
Insulation and is the direct responsibility of Subcommittee C16.31 on Chemical and
2
Physical Properties. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 1, 2019. Published October 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1957. Last previous edition approved 2013 as C390 – 08 (2013). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0390-08R19. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959.
...
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C390 − 08 (Reapproved 2019)
Standard Practice for
1
Sampling and Acceptance of Thermal Insulation Lots
This standard is issued under the fixed designation C390; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This practice covers criteria for establishing the accept-
C168 Terminology Relating to Thermal Insulation
ability of lots of shipments of preformed board, preformed
E2234 Practice for Sampling a Stream of Product by Attri-
block and pipe, and batts and blanket thermal insulation based
butes Indexed by AQL
on sampling and inspection.
1.2 This practice is intended for use in conjunction with 3. Terminology
appropriate ASTM material specifications that classify and
3.1 Definitions—Definitions pertaining to thermal insulat-
describe the specific physical requirements for the product in
ing materials are defined in Terminology C168.
terms of qualification requirements and inspection require-
3.1.1 acceptable quality level (AQL)—when a continuous
ments. Determination of nonconformity shall be based on the
series of lots is considered, the quality level which for purposes
tolerances for individual sample test values prescribed in the
of sampling inspection is the limit of a satisfactory process
material specification.
average. The listed AQL (AQL=10%) is the maximum percent
defective level accepted 95 % of the time by the sampling plan.
1.3 This practice may require inspection substantially dif-
3.1.2 acceptance number—the maximum number of the
ferent from that performed in the normal course of production.
nonconformities or nonconforming units in the sample that will
If the purchaser requires sampling and acceptance inspection in
permit acceptance of the inspected lot or batch.
accordance with this practice, he shall so specify in the order or
contract. 3.1.3 inspection—the process of measuring, examining,
testing, gaging, or otherwise comparing the unit with the
1.4 The values stated in inch-pound units are to be regarded
applicable requirements.
as standard. The values given in parentheses are mathematical
3.1.4 inspection lot—a collection of units of product from
conversions to SI units that are provided for information only
which a sample is drawn and inspected to determine confor-
and are not considered standard.
mance with the acceptability criteria.
1.5 This standard does not purport to address all of the
3.1.4.1 Discussion—An inspection lot may differ from a lot
safety concerns, if any, associated with its use. It is the defined for other purposes.
responsibility of the user of this standard to establish appro-
3.1.5 inspection, normal—inspection that is used in accor-
priate safety, health, and environmental practices and deter-
dance with an acceptance sampling scheme when a process is
mine the applicability of regulatory limitations prior to use.
considered to be operating at, or slightly better than, its
1.6 This international standard was developed in accor- acceptable quality level.
dance with internationally recognized principles on standard-
3.1.6 inspection, tightened—a feature of a sampling scheme
ization established in the Decision on Principles for the
using stricter acceptance criteria than those used in normal
Development of International Standards, Guides and Recom-
inspection. Tightened inspection is used in some sampling
mendations issued by the World Trade Organization Technical
schemes as a protective measure to increase the probability of
Barriers to Trade (TBT) Committee.
rejecting lots when experience shows the level of submitted
quality has deteriorated significantly.
3.1.6.1 Discussion—It is expected that the higher rate of
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
Insulation and is the direct responsibility of Subcommittee C16.31 on Chemical and
2
Physical Properties. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 1, 2019. Published October 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1957. Last previous edition approved 2013 as C390 – 08 (2013). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0390-08R19. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C390 − 08 (2019)
rejecti
...
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: C390 − 08 (Reapproved 2013) C390 − 08 (Reapproved 2019)
Standard Practice for
1
Sampling and Acceptance of Thermal Insulation Lots
This standard is issued under the fixed designation C390; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This practice covers criteria for establishing the acceptability of lots of shipments of preformed board, preformed block and
pipe, and batts and blanket thermal insulation based on sampling and inspection.
1.2 This practice is intended for use in conjunction with appropriate ASTM material specifications that classify and describe the
specific physical requirements for the product in terms of qualification requirements and inspection requirements. Determination
of nonconformity shall be based on the tolerances for individual sample test values prescribed in the material specification.
1.3 This practice may require inspection substantially different from that performed in the normal course of production. If the
purchaser requires sampling and acceptance inspection in accordance with this practice, he shall so specify in the order or contract.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.6 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. Referenced Documents
2
2.1 ASTM Standards:
C168 Terminology Relating to Thermal Insulation
E2234 Practice for Sampling a Stream of Product by Attributes Indexed by AQL
3. Terminology
3.1 Definitions—Definitions pertaining to thermal insulating materials are defined in Terminology C168.
3.1.1 acceptable quality level (AQL)—when a continuous series of lots is considered, the quality level which for purposes of
sampling inspection is the limit of a satisfactory process average. The listed AQL (AQL=10%) is the maximum percent defective
level accepted 95 % of the time by the sampling plan.
3.1.2 acceptance number—the maximum number of the nonconformities or nonconforming units in the sample that will permit
acceptance of the inspected lot or batch.
3.1.3 inspection—the process of measuring, examining, testing, gaging, or otherwise comparing the unit with the applicable
requirements.
3.1.4 inspection lot—a collection of units of product from which a sample is drawn and inspected to determine conformance
with the acceptability criteria.
3.1.4.1 Discussion—
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.31 on Chemical and Physical
Properties.
Current edition approved Nov. 1, 2013Sept. 1, 2019. Published March 2014October 2019. Originally approved in 1957. Last previous edition approved 20082013 as
ε1
C390 – 08 (2013). . DOI: 10.1520/C0390-08R13.10.1520/C0390-08R19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C390 − 08 (2019)
An inspection lot may differ from a lot defined for other purposes.
3.1.5 inspection, normal—inspection that is used in accordance with an acceptance sampling scheme when a process is
considered to be operating at, or slightly better than, its acceptable quality level.
3.1.6 inspection, tightened—a feature of a sampling scheme using st
...
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