Standard Practices for Detecting Leaks in Reverse Osmosis and Nanofiltration Devices

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

03-01-2023

Publisher

American Society for Testing and Materials

1.1These practices cover detecting leaks in which there is a direct communication between the feed or concentrate, or both, and the permeate. Several types of leaks are possible with the various configurations of reverse-osmosis (RO) and nanofiltration (NF) devices.

1.2Types of Leaks:

1.2.1With hollow-fiber devices, feed or concentrate leakage, or both, into the permeate stream by leaks through the tube sheet and past the tube sheet O-ring are possible. “Leaks” caused by broken fibers are not covered by these practices.

1.2.2With spiral-wound devices, leaks may occur through damage of the membrane surface itself by punctures or scratches, by glue-line failure, and by O-ring leaks on product tube interconnectors.

1.2.3With tubular devices, leaks due to membrane damage, tube end seal leaks, and leaks from broken tubes or product headers are possible.

1.3Three leak test practices are given as follows:

	Sections
Practice A—Tube Sheet and O-Ring Leak Test for Hollow Fiber Devices	8 to 9
Practice B—Vacuum Test for Spiral Wound Devices	10 to 12
Practice C—Dye Test for Spiral Wound and Tubular Devices	13 to 18

1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5This 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.

1.6This 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.

Committee	D 19
DocumentType	Standard Practice
Pages	4
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM D 3923 : 2008 : R2014

ASTM D 6908 : 2006 : R2017	Standard Practice for Integrity Testing of Water Filtration Membrane Systems
ASTM D 7601 : 2019	Standard Practice for Pressure Driven Membrane Separation Element/Bundle Evaluation

ASTM D 1129 : 2013 : R2020 : EDT 2	Standard Terminology Relating to Water
ASTM D 1129 : 2013 : R2020 : EDT 1	Standard Terminology Relating to Water
ASTM D 4194 : 2023	Standard Test Methods for Operating Characteristics of Reverse Osmosis and Nanofiltration Devices