ASTM D4692-01(2010)
Standard Practice for Calculation and Adjustment of Sulfate Scaling Salts (CaSO₄, SrSO₄, and BaSO₄) for Reverse Osmosis and Nanofiltration

Standard No.

ASTM D4692-01(2010)

Release Date

2001

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D4692-01(2017)

Latest

ASTM D4692-01(2017)

Scope

In the design and operation of reverse osmosis and nanofiltration installations, it is important to predict the CaSO₄, SrSO₄, and BaSO₄ scaling properties of the concentrate stream. Because of the increase in total dissolved solids and the increase in concentration of the scaling salts, the scaling properties of the concentrate stream will be quite different from those of the feed solution. This practice permits the calculation of the scaling potential for the concentrate stream from the feed water analyses and the reverse osmosis or nanofiltration operating parameters.

Scaling by CaSO₄, SrSO₄, and BaSO₄ will adversely affect the reverse osmosis or nanofiltration performance. This practice gives various procedures for the prevention of scaling.

1.1 This practice covers the calculation and adjustment of calcium, strontium, and barium sulfates for the concentrate stream of a reverse osmosis or nanofiltration system. The calculations are used to determine the need for scale control in the operation and design of reverse osmosis and nanofiltration installations. This practice is applicable for all types of reverse osmosis devices (tubular, spiral wound, and hollow fiber) and nanofiltration devices.

1.2 This practice is applicable to both brackish waters and seawaters.

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

ASTM D4692-01(2010) Referenced Document

• ASTM D1129 Standard Terminology Relating to Water
• ASTM D3352 Standard Test Method for Strontium Ion in Brackish Water, Seawater, and Brines
• ASTM D4194 Standard Test Methods for Operating Characteristics of Reverse Osmosis Devices
• ASTM D4195 Standard Guide for Water Analysis for Reverse Osmosis Application
• ASTM D4382 Standard Test Method for Barium in Water, Atomic Absorption Spectrophotometry, Graphite Furnace
• ASTM D511 Standard Test Methods for Calcium and Magnesium In Water
• ASTM D516 Standard Test Method for Sulfate Ion in Water
• ASTM D6161 Standard Terminology Used for Crossflow Microfiltration, Ultrafiltration, Nanofiltration, and Reverse Osmosis Membrane Processes

ASTM D4692-01(2010) history

• 2017 ASTM D4692-01(2017) Standard Practice for Calculation and Adjustment of Sulfate Scaling Salts (CaSO4, SrSO4, and BaSO4) for Reverse Osmosis and Nanofiltration
• 2001 ASTM D4692-01(2010) Standard Practice for Calculation and Adjustment of Sulfate Scaling Salts (CaSO₄, SrSO₄, and BaSO₄) for Reverse Osmosis and Nanofiltration
• 2001 ASTM D4692-01(2006)e1 Standard Practice for Calculation and Adjustment of Sulfate Scaling Salts (CaSO₄, SrSO₄, and BaSO₄) for Reverse Osmosis and Nanofiltration
• 2001 ASTM D4692-01 Standard Practice for Calculation and Adjustment of Sulfate Scaling Salts (CaSO₄, SrSO₄, and BaSO₄) for Reverse Osmosis and Nanofiltration
• 1987 ASTM D4692-87(1996) Standard Practice for Calculation and Adjustment of Sulfate Scaling Salts (CaSO₄, SrSO₄, and BaSO₄) for Reverse Osmosis and Nanofiltration