GB/T 337.2-2014Dilute nitric acid for industrial use (English PDF)

Foreword

GB/T 337 Nitric Acid for Industrial Use can be divided into the following two parts.

--- Part 1. Concentrated Nitric Acid for Industrial Use;

--- Part 2. Dilute Nitric Acid for Industrial Use. This Part belongs to Part 2 of GB/T 337.

This Part was drafted as per the rules specified in GB/T 1.1-2009.

This Part replaced GB/T 337.2-2002 Dilute Nitric Acid for Industrial Use. Compared with GB/T 337.2-2002, this Part has the following major technical changes besides editorial changes.

--- Add product type (see Chapter 4);

--- Delete Acid 62, add the specification of Acid 60 and Acid 55 (see 5.2 of this Edition; 3.2 of 2002 Edition);

--- Adjust the nitrous acid content from 0.20% to 0.10%; adjust burning residue from 0.02% to 0.01% (see 5.2 of this Edition; 3.2 of 2002 Edition);

--- Modify the test procedures of nitric acid content (see 6.3 of this Edition; 4.1 of 2002 Edition);

--- Modify the test procedures of nitrous acid content (see 6.4 of this Edition; 4.2 of 2002 Edition);

--- Modify the test procedures of burning residue (see 6.5 of this Edition; 4.3 of 2002 Edition);

--- Modify the inspection rules of the product (see Chapter 7 of this Edition; Chapter 5 of 2002 Edition).

1 Scope

This Part of GB/T 337 specifies the types, requirements, test methods, inspection rules, mark, label, package, transportation, storage and safety of dilute nitric acid for industrial use.

This Part is applicable to the dilute nitric acid for industrial use. This Product is mainly used for preparation of concentrated nitric acid, nitrate, nitrate nitrogen fertilizer and other raw materials.

2 Normative References

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.

GB 190-2009 Packing Symbol of Dangerous Goods

GB/T 337.1-2014 Concentrated Nitric Acid for Industrial Use

GB/T 6678 General Principles for Sampling Chemical Products

GB/T 6680 General Rules for Sampling Liquid Chemical Products

GB/T 6682-2008 Water for Analytical Laboratory Use - Specification and Test Methods

GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgement of Limiting Values

HG/T 3696.1 Inorganic Chemicals for Industrical Usepreparations of Standard and Reagent Solutions for Chemical Analysispart 1. Preparations of Standard Volumetric Solutions e) Contractual provisions.

7 Inspection Rules

7.3 The indexes of nitric acid content and nitrous acid content specified in this Part belong to the exit-factory inspection items, and shall be inspected batch by batch.

7.4 The products with the same quality that are produced continuously or produced in the same shift consist of one batch; one batch can also be formed through the product storage cans.

7.5 Determine the number of sampling units and liquid sampling equipment as per the provisions of GB/T 6678 and GB/T 6680. Sample can be taken by the glass sampling tube or stainless steel sampling tube. From the upper, middle and lower parts of the container to take a uniform sample; the sampling volume shall be no less than 500mL. Collect the samples to the clean, dry, stoppered brown glass bottle or hard plastic bottle, then seal it. Paste the label on the bottle including manufacturer name, product name, batch number, sampling date, and sampler name. One shall be taken as the laboratory sample, the other shall be stored for future reference; the retention time shall be determined by the manufacturer according to the actual demand; it is recommended that one week shall not be exceeded.

7.6 If there is any indicators not meeting the requirements of this Part in the test results, re-inspect through taking twice amount of samples; if there is one indicator not meeting the requirements of this Part in the re-inspection results, the whole batch of products shall be determined as disqualified.

7.7 Judge whether the inspection results conform to this Part according to the provisions of round-off comparison method stipulated in GB/T 8170.

8 Mark and Label

8.1 There shall be firm and clear mark on the package of the dilute nitric acid, which includes manufacturer name, product name, as well as the labels of "corrosive substances" and "oxidizing substances" stipulated in GB 190-2009.

8.2 Each batch of dilute nitric acid leaving the factory shall be attached with quality certificate. The contents of quality certificate include manufacturer name, factory address, product name, specification, net content, batch number (or manufacturing date) and this Part number.

9 Package, Transportation and Storage

9.1 Dilute nitric acid shall be packed by the hard plastic and stainless steel containers that are dilute nitric acid resistant. […]