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ASTM D7571-10

(Specification)

Standard Specification for Retained Sewn Seam Strength After Exposures to Hot Air and Open Flame

Standard Specification for Retained Sewn Seam Strength After Exposures to Hot Air and Open Flame

SIGNIFICANCE AND USE
It is possible that the user of FR protective clothing will experience repeated exposures to hot air as part of the work environment. While these individual exposures are likely not to pose a catastrophic threat, the cumulative effect of these exposures are likely to reduce the level of retained sewn seam strength performance to a value that is measurably lower than the sewn seam strength performance requirement established for a new item.  
The assembly of textile structures requires that the seam engineering used to manufacture the product anticipate how to retain the maximum sewn seam strength during the anticipated life cycle of the product.
Initial sewn seam strength performance requirements of FR textile products measures sewn seam strength of a new (never exposed to heat environment) product.
Retained sewn seam strength (RSS50) can be used to measure seam failure of FR protective clothing after repeated short duration exposures to high heat. RSS50 can also be used to measure seam failure of FR protective clothing when exposed to open flame after repeated short duration exposures to high heat.
These data about retained sewn seam strength are useful to establish criteria to determine when to repair, retire, or replace FR protective clothing.
SCOPE
1.1 This specification covers the retained sewn seam strength of flame resistant fabric subassemblies after repeated short duration exposures to hot air or repeated short-duration exposures to hot air and subsequent short-term exposures to open-flame impingement.
1.1.1 This specification is used to determine minimum retained sewn seam strength after these exposures.
1.2 This standard is not intended to serve as a detailed manufacturing or purchasing specification, but can be referenced in purchase contracts to ensure that minimum performance requirements are met.
1.3 Controlled laboratory tests used to determine compliance with the performance requirements of this standard shall not be deemed as establishing performance levels for all situations to which wearers of FR protective clothing are potentially exposed.
1.4 Mandatory requirements are indicated by use of shall; recommendations and advising information is indicated by should.
1.5 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions.
1.6 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests.
1.7 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 and health practices, and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Apr-2010
ICS
59.080.30 - Textile fabrics
Technical Committee
D13 - Textiles
Drafting Committee
D13.52 - Flammability
Current Stage
Ref Project

Relations

Replaced By
ASTM D7571-10(2014)e1 - Standard Specification for Retained Sewn Seam Strength After Exposures to Hot Air and Open Flame
Effective Date
01-Jul-2014
Referred By
ASTM F2894-21 - Standard Test Method for Evaluation of Materials, Protective Clothing, and Equipment for Heat Resistance Using a Hot Air Circulating Oven
Effective Date
01-May-2010

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ASTM D7571-10 - Standard Specification for Retained Sewn Seam Strength After Exposures to Hot Air and Open FlameASTM D7571-10 - Standard Specification for Retained Sewn Seam Strength After Exposures to Hot Air and Open Flame
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ASTM D7571-10 - Standard Specification for Retained Sewn Seam Strength After Exposures to Hot Air and Open Flame
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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:D7571 −10
StandardSpecification for
Retained Sewn Seam Strength After Exposures to Hot Air
and Open Flame
This standard is issued under the fixed designation D7571; 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.
INTRODUCTION
Sewn seam strength of flame resistant textile products is a critical measurement of structural
integrity. This is particularly important for flame resistant (FR) personal protective clothing and
equipment (PPE), which is designed to provide safety to any worker who may, during the service life
ofthePPE,experiencemultipleshorttermexposurestohighheat.While“new”FRprotectiveclothing
items can provide the wearer with protection that meets a specific performance requirement, it is
useful to know what the cumulative effects of repeated exposures to high heat can do to the integrity
of the sewn seams used to construct protective clothing items. In addition, it is useful to know how
the cumulative exposures can affect the sewn seam strength performance of the PPE when exposed to
an open flame for a short period of time.
During normal use, some FR specialized clothing items can, for short durations, be repeatedly
exposed to high heat. While the cumulative effect of repeated short duration exposures to high heat
is known to result in a loss of fabric strength, these same exposures can also result in a loss of sewing
thread break strength. This loss of break strength can result in lower retained sewn seam strength that
can put the wearer at potential risk of injury if the garment is too weak to maintain integrity of the
structure.
While there are recognized minimum sewn seam strength values required for new FR garments,
never exposed to heat or flame hazard, this standard is intended to measure the retained sewn seam
strength after repeated exposures to high heat and a subsequent exposure to open flame.
These data may be useful as additional information for agencies that want criteria to establish
selection, care, maintenance and retirement/replacement of FR protective clothing.
1. Scope 1.3 Controlled laboratory tests used to determine compli-
ance with the performance requirements of this standard shall
1.1 This specification covers the retained sewn seam
not be deemed as establishing performance levels for all
strength of flame resistant fabric subassemblies after repeated
situations to which wearers of FR protective clothing are
short duration exposures to hot air or repeated short-duration
potentially exposed.
exposures to hot air and subsequent short-term exposures to
1.4 Mandatory requirements are indicated by use of shall;
open-flame impingement.
recommendations and advising information is indicated by
1.1.1 This specification is used to determine minimum
retained sewn seam strength after these exposures. should.
1.5 This standard is used to measure and describe the
1.2 This standard is not intended to serve as a detailed
response of materials, products, or assemblies to heat and
manufacturing or purchasing specification, but can be refer-
flame under controlled conditions, but does not by itself
enced in purchase contracts to ensure that minimum perfor-
incorporate all factors required for fire hazard or fire risk
mance requirements are met.
assessment of the materials, products, or assemblies under
actual fire conditions.
This specification is under the jurisdiction of ASTM Committee D13 on
1.6 Fire testing is inherently hazardous. Adequate safe-
Textiles and is the direct responsibility of Subcommittee D13.52 on Flammability.
guards for personnel and property shall be employed in
Current edition approved May 1, 2010. Published June 2010. DOI: 10.1520/
D7571-10. conducting these tests.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7571−10
1.7 This standard does not purport to address all of the 4.2.1 Initial sewn seam strength performance requirements
safety concerns, if any, associated with its use. It is the of FR textile products measures sewn seam strength of a new
responsibility of the user of this standard to establish appro- (never exposed to heat environment) product.
priate safety and health practices, and determine the applica- 4.2.2 Retained sewn seam strength (RSS ) can be used to
bility of regulatory limitations prior to use. measure seam failure of FR protective clothing after repeated
short duration exposures to high heat. RSS can also be used
2. Referenced Documents
to measure seam failure of FR protective clothing when
exposed to open flame after repeated short duration exposures
2.1 ASTM Standards:
to high heat.
D123 Terminology Relating to Textiles
D1683 Test Method for Failure in Sewn Seams of Woven
4.3 These data about retained sewn seam strength are useful
Apparel Fabrics
to establish criteria to determine when to repair, retire, or
D1776 Practice for Conditioning and Testing Textiles
replace FR protective clothing.
D4391 Terminology Relating to The Burning Behavior of
Textiles
5. Materials and Manufacture
D6193 Practice for Stitches and Seams
5.1 Sewn seam assembly samples for testing shall be made
D7016 Test Method to Evaluate Edge Binding Components
using seams and stitches described in Practice D6193 and
Used in Mattresses After Exposure to An Open Flame
constructed with inherently flame resistant sewing thread.
2.2 AATCC Test Methods:
5.2 Purchaser and supplier shall agree on the number of
TM 135 Dimensional Changes of Fabrics after Home Laun-
specimens to be tested.As a minimum, five specimens of each
dering
4 construction shall be tested.
2.3 ISO Documents:
5.3 For details about samples and conditioning see Section
ISO 17493 Clothing and Equipment for Protection Against
6.
HeatTest Method for Convective Heat Resistance Using a
Hot Air Circulating Oven
6. Sampling and Wash Conditioning
3. Terminology
6.1 Prepare samples as described in Test Method D1683,
3.1 The following terms are relevant to this standard:
Section 8, with the following modifications:
critical sewn seams, retained sewn seam strength (RSS ),
6.1.1 Cut twelve pieces of fabric sections so that each fabric
seam engineering, sewn seam strength.
section is 600 6 2 mm (24.0 6 0.1 in.) long by 125 62mm
(5 6 0.1 in.) wide.
3.2 For all terms related to flammability of textiles see
6.1.1.1 Separate cut fabric sections into six sets of two
Terminology D4391.
pieces for sample sewing.
3.3 For all terminology related to textiles, see Terminology
6.1.1.2 Stitch the two pieces of fabric together with the
D123.
seam assembly normally used to attain critical sewn seam
strength for an FR fabric having a specific mass, as identified
4. Significance and Use
in Section 10, in lengthwise direction. This will produce six
4.1 It is possible that the user of FR protective clothing will
seam samples. Each sample
...

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5.1 In general, these procedures are more suitable for testing woven fabrics than knit fabrics.  
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5.2.1 In case of a dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are from a lot of material of the type in question. Test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using the appropriate statistical analysis and an acceptable probability level chosen by the two parties before testing is begun. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results with consideration to the known bias.  
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Standard Test Method for Bursting Strength of Textile Fabrics—Diaphragm Bursting Strength Tester Method

SIGNIFICANCE AND USE
5.1 This method for the determination of diaphragm bursting strength of knitted, nonwoven and woven fabrics is being used by the textile industry for the evaluation of a wide variety of end uses.  
5.2 In cases where test results obtained using the procedures in Test Method D3786 have not been correlated with actual performance, Test Method D3786 is considered satisfactory for acceptance testing of commercial shipments of textile fabrics for bursting strength since the method has been used extensively in the trade for acceptance testing. In cases where disagreement arising from differences in values reported by the purchaser and the supplier when using Test Method D3786 for acceptance testing, the statistical bias, if any, between the laboratory of the purchaser and the laboratory of the supplier should be determined with comparison based on testing specimens randomly drawn from one sample of material of the type being evaluated.
Note 2: The kind of load transfer and stretch that occur when knitted goods and nonwoven fabrics are worn are prevented by clamping them as described in this method.
SCOPE
1.1 This test method describes the measurement of the resistance of textile fabrics to bursting using a hydraulic or pneumatic diaphragm bursting tester. This test method is generally applicable to a wide variety of textile products.  
1.2 This test method may also be applicable for stretch woven and woven industrial fabrics such as inflatable restraints. As new materials that may exceed the range of the instrument are developed, please refer to the reporting section and consider using Test Methods D3787 or D6797 instead.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
Note 1: For the measurement of the bursting strength by means of a ball burst mechanism, refer to Test Method D3787.  
1.4 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.  
1.5 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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ASTM
ASTM D737-18(2023)(Test Method)
Standard Test Method for Air Permeability of Textile Fabrics

SIGNIFICANCE AND USE
5.1 This test method is considered satisfactory for acceptance testing of commercial shipments since current estimates of between-laboratory precision are acceptable, and this test method is used extensively in the trade for acceptance testing.  
5.1.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, ensure the test samples to be used are as homogeneous as possible, are drawn from the material from which the disparate test results were obtained, and are randomly assigned in equal number to each laboratory for testing. The test results from the two laboratories should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.  
5.2 Air permeability is an important factor in the performance of such textile materials as gas filters, fabrics for air bags, clothing, mosquito netting, parachutes, sails, tentage, and vacuum cleaners. In filtration, for example, efficiency is directly related to air permeability. Air permeability also can be used to provide an indication of the breathability of weather-resistant and rainproof fabrics, or of coated fabrics in general, and to detect changes during the manufacturing process.  
5.3 Performance specifications, both industrial and military, have been prepared on the basis of air permeability and are used in the purchase of fabrics where permeability is of interest.  
5.4 Construction factors and finishing techniques can have an appreciable effect upon air permeability by causing a change in the length of airflow paths through a fabric. Hot calendaring can be used to flatten fabric components, thus reducing...
SCOPE
1.1 This test method covers the measurement of the air permeability of textile fabrics.  
1.2 This test method applies to most fabrics including woven fabrics, nonwoven fabrics, air bag fabrics, blankets, napped fabrics, knitted fabrics, layered fabrics, and pile fabrics. The fabrics may be untreated, heavily sized, coated, resin-treated, or otherwise treated.  
1.3 The values stated in SI units are to be regarded as the standard. The values stated in inch-pound units may be approximate.  
1.4 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.  
1.5 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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ASTM
ASTM D4850-23(Terminology)
Standard Terminology Relating to Fabrics and Fabric Test Methods

SCOPE
1.1 This terminology covers definitions of technical terms used in the industry related to textile fabrics. Terms that are generally understood or adequately defined in other readily available sources are not included. Other terminology standards that have terms related to textile fabrics are shown in 2.1  
1.2 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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  • Standard
    11 pages
    English language
    sale 15% off