ASTM D6908-05

Standard Practice for Integrity Testing of Water Filtration Membrane Systems

SCOPE
1.1 This standard covers the determination of the integrity of water filtration membrane elements and systems using air based tests (pressure decay and vacuum hold), soluble dye, and TOC monitoring tests for the purpose of rejecting particles and microbes. The tests are applicable to systems with membranes that have a nominal pore size less than about 1 m. The TOC and Dye tests are generally applicable to NF and RO class membranes only.
1.2 This standard does not purport to cover all available methods of integrity testing.
1.3 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-Sep-2005
• ICS: 13.060.01 - Water quality in general
• Technical Committee: D19 - Water
• Drafting Committee: D19.08 - Membranes and Ion Exchange Materials

Relations

• Replaces: ASTM D6908-03 - Standard Practice for Integrity Testing of Water Filtration Membrane Systems
• Effective Date: 01-Oct-2005
• Replaced By: ASTM D6908-06 - Standard Practice for Integrity Testing of Water Filtration Membrane Systems
• Effective Date: 01-Jul-2006
• Referred By: ASTM D7285-06(2017) - Standard Guide for Recordkeeping Microfiltration and Ultrafiltration Systems
• Effective Date: 01-Oct-2005
• Referred By: ASTM D3923-23 - Standard Practices for Detecting Leaks in Reverse Osmosis and Nanofiltration Devices
• Effective Date: 01-Oct-2005
• Referred By: ASTM D7601-19 - Standard Practice for Pressure Driven Membrane Separation Element/Bundle Evaluation
• Effective Date: 01-Oct-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation: D 6908 – 05
Standard Practice for
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Integrity Testing of Water Filtration Membrane Systems
This standard is issued under the fixed designation D6908; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope D5904 Total Carbon, Inorganic Carbon and Organic Car-
bon in Water by Ultraviolet, Persulfate Oxidation and
1.1 This standard covers the determination of the integrity
Membrane Conductivity Detection
of water filtration membrane elements and systems using air
D5997 On-Line Monitoring of Total Carbon, Inorganic
based tests (pressure decay and vacuum hold), soluble dye,
Carbon in Water by Ultraviolet, Persulfate Oxidation, and
continuous monitoring particulate light scatter techniques, and
Membrane Conductivity Detection
TOCmonitoringtestsforthepurposeofrejectingparticlesand
D6161 Terminology Used for Crossflow Microfiltration,
microbes. The tests are applicable to systems with membranes
Ultrafiltration, Nanofiltration and Reverse Osmosis Mem-
that have a nominal pore size less than about 1 µm. The TOC,
brane Processes
and Dye, tests are generally applicable to NF and RO class
D6698 Test Method for the On-Line Measurement of
membranes only.
Turbidity Below 5 NTU in Water
1.2 This standard does not purport to cover all available
E20 Practice for Particle Size Analysis of Particulate Sub-
methods of integrity testing.
stances in the Range of 0.2 to 75 Micrometers by Optical
1.3 This standard does not purport to address all of the
Microscopy
safety concerns, if any, associated with its use. It is the
E128 Maximum Pore Diameter and Permeability of Rigid
responsibility of the user of this standard to establish appro-
Porous Filters for Laboratory Use
priate safety and health practices and determine the applica-
F658 Practice for Defining Size Calibration, Resolution,
bility of regulatory limitations prior to use.
and CountingAccuracy of a Liquid-borne Particle Counter
2. Referenced Documents
Using Nearmonodisperse Spherical Particulate Material
2
2.1 ASTM Standards:
3. Terminology
D1129 Terminology Relating to Water
3.1 Definitions—For definitions of terms used in this prac-
D2777 Determination of Precision and Bias of Applicable
tice, refer to Terminologies D6161 and D1129.
Tests Methods of Committee D19 on Water
3.1.1 For description of terms relating to cross flow mem-
D3370 PracticesforSamplingWaterfromClosedConduits
brane systems, refer to Terminology D6161.
D3864 Guide for Continual On-Line Monitoring Systems
3.1.2 For definition of terms relating to dissolved carbon
for Water Analysis
and carbon analyzers, refer to D5173, D5904 and D5997.
D3923 Practice for the Determination of Leaks Within a
3.1.3 bubble point—when the pores of a membrane are
Reverse Osmosis Device
filled with liquid and air pressure is applied to one side of the
D4839 Total Carbon and Organic Carbon in Water by
membrane, surface tension prevents the liquid in the pores
Ultraviolet, or Persulfate Oxidation, or Both, and Infrared
from being blown out by air pressure below a minimum
Detection
pressure known as the bubble point.
D5173 On-Line Monitoring of Carbon Compounds in Wa-
3.1.4 equivalent diameter—the diameter of a pore or defect
ter by Chemical Oxidation, by UV Light Oxidation, by
calculated from its bubble point using Eq 1 (see 9.3). This is
Both, or by High Temperature Combustion Followed by
not necessarily the same as the physical dimensions of the
Gas Phase NDIR or by Electrolytic Conductivity
defect(s).
3.1.5 integrity—measure of the degree to which a mem-
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This practice is under the jurisdiction ofASTM Committee D19 on Water and brane system rejects particles of interest. Usually expressed as
is the direct responsibility of Subcommittee D19.08 on Membranes and Ion
a log reduction value (LRV).
Exchange Materials.
3.1.6 log reduction value (LRV)—a measure of the particle
Current edition approved Oct. 1, 2005. Published December 2005. Originally
removal efficiency of the membrane system expressed as the
approved in 2003. Last previous edition approved in 2003 as D6908–03.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
log of the ratio of the particle concentration in the untreated
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
and treated fluid. For example, a 10-fold reduction in particle
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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