GB/T 33584.4-2017Seawater quality requirements and analysis methods for seawater cooling system—Part 4: Determination of sulfate (English PDF)

Foreword

GB/T 33584 "seawater cooling water quality requirements and analysis of detection methods" is divided into six parts.

Part 1: Determination of calcium and magnesium ions;

- Part 2: Determination of zinc;

- Part 3: Determination of chlorides;

- Part 4: Determination of sulphate;

- Part 5: Determination of dissolved solids;

Part 6: Determination of isobacteria.

This part is part 4 of GB/T 33584.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

WARNING - Personnel using this standard should have practical experience in formal laboratory work. This standard does not indicate all possible security questions. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set forth in the relevant national regulations.

1 Scope

This part of GB/T 33584 specifies the water quality requirements for seawater cooling and the determination of sulfuric acid in seawater cooling water by spectrophotometer Salt content method.

This part is applicable to the determination of sulfate content in seawater cooling water at 1000mg/L ~ 6000mg/L (calculated as SO2-4).

2 Normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this document. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 6682 Analytical laboratory water specifications and test methods

GB/T 12806 laboratory glass instrument single standard line capacity bottle

GB/T 12807 Laboratory glass instruments - Index pipettes

GB/T 12808 Laboratory glass instruments Single line suction pipette

3 Water quality requirements

The main water quality indicators of seawater cooling water shall meet the requirements of Table 1.

Note 1. The permissible values for Ca2, Mg2, Cl-, SO2-4, and isozyme are derived from 6.1.2 and 6.1.3 of GB/T 23248-2009.

Note 2. The permissible value of Zn2 is derived from GB 8978-1996 Table 4 Class II pollutant maximum allowable discharge concentration level standard.

Note 3. The permissible value of the dissolved solids is determined by the maximum concentration of N = 2.5 times the actual seawater cooling.