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ASTM D3923-08(2014)

Current Reaffirmation

Standard Practices for Detecting Leaks in Reverse Osmosis and Nanofiltration Devices

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1.1 These 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.

1.2 Types of Leaks:

1.2.1 With 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.

1.2.2 With 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.

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

1.3 Three 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


1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.


5.1 These practices may be used to determine whether a RO or NF device is free of leaks if the mechanical integrity of the device is to be confirmed. They may also be used to detect leaks in RO or NF devices whose operating performance indicates a possible leak. These practices may be used for either new or used devices.

SDO ASTM: ASTM International
Document Number D3923
Publication Date Jan. 1, 2014
Language en - English
Page Count 3
Revision Level 08(2014)
Supercedes
Committee D19.08
Publish Date Document Id Type View
Jan. 1, 2023 D3923-23 Revision
Oct. 1, 2008 D3923-08 Revision
Jan. 1, 2014 D3923-08R14 Reaffirmation
June 10, 2003 D3923-94R03E01 Reaffirmation
Dec. 10, 1998 D3923-94R98 Reaffirmation