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GB/T 2449.2-2015Sulphur for industrial use—Part 2: Liquid product (English PDF)

工业硫磺第2部分：液体产品

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 9, 2015

Implementation date

May 1, 2016

Scope

GB/T 2449.2-2015 is the English-translated version of 工业硫磺第2部分：液体产品.

GB/T 2449.2-2015 fixes the requirements, sampling, test methods, inspection rules, marks, packaging, transport, storage and safety provisions for liquid sulphur for industrial use.

Clause 1 states that this Part applies to liquid industrial sulphur produced from recycled petroleum refinery gas and natural gas, and adds that liquid industrial sulphur produced by other processes may also be handled by reference to it.

A warning at the head of the text notes that some of the reagents used are toxic or corrosive and some of the operations dangerous, that the Part does not reveal all potential safety issues, and that users are responsible for taking appropriate safety and health measures.

Its contents list names Scope, Normative references, Term and definition, Requirements, Sampling, Test methods, Inspection rules, Symbols, packaging, transportation and storage, and Safety.

Clause 5 prescribes sampling to GB/T 6680: point samples taken by automatic or mechanical closure during the loading or discharge of tankers, or equal-volume composites from the upper, middle and lower sampling ports of tanks, with discharge openings used where there are no sampling ports; the total sample is at least 1 kg, it is divided in equal volumes into test and reservation samples with the reservation samples kept at least 30 days, and about 500 g of test sample is crushed to pass a 250 micrometre test sieve conforming to the R40/3 series of GB/T 6003.1; a separate sampling device is used for hydrogen sulfide and hydrogen polysulfide.

Clause 6 determines appearance by visual observation and refers the determination of the mass fractions of sulphur, water, ash, organics, arsenic and iron and of the acidity to GB/T 2449.1, while hydrogen sulfide and hydrogen polysulfide are determined by melting the specimen in an oil bath at 145 degrees Celsius plus or minus 2 degrees, purging the hydrogen sulfide with nitrogen, absorbing it in zinc acetate solution to form zinc sulfide, reacting that precipitate with iodine in acid solution and titrating the excess iodine with sodium thiosulfate standard volumetric solution.

Clause 7 requires type inspection at least once a month and also on a change in the sources of raw and auxiliary materials or in the process, on resumption after a production halt, where exit-factory results diverge markedly from the previous type inspection, or at the demand of the national quality supervision and inspection agency or of users; results are judged by the rounding comparison method of GB/T 8170, and a single failing indicator calls for re-sampling, with the whole batch rejected if one indicator still fails on re-inspection.

The same clause gives organizations using the product the right to carry out acceptance against this Part, with arbitration inspection by a qualified third party in case of dispute, and clause 8 requires each packaging container to carry an obvious and solid Flammable Liquid symbol conforming to GB 190 and the product to be carried in special tankers.

This Part is Part 2 of GB/T 2449 Sulphur for industrial use, the other part covering solid product; it was drafted to the rules of GB/T 1.1-2009, falls under the National Technical Committee for Standardization of Chemistry (SAC/TC 63), was issued on 9 October 2015 and has applied since 1 May 2016.

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Document preview — GB/T 2449.2-2015

National Standard of the People's Republic of China

ICS: 71.060.10
Classification: G 13

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
1 Scope4
2 Normative references4
3 Term and definition5
4 Requirements5
5 Sampling5
6 Test methods7
7 Inspection rules11
8 Symbols, packaging, transportation and storage12
9 Safety13

Foreword

GB/T 2449 Sulphur for industrial use is divided into two parts.

- Part 1. Solid product;

- Part 2. Liquid product. This Part is the Part 2 of the GB/T 2449.

This Part is drafted according to the rules given in the GB/T 1.1-2009.

1 Scope

This Part of the GB/T 2449 specifies the requirements, sampling, test methods, inspection rules, marks, packaging, transportation, storage and safety of the liquid sulphur for industrial use.

This Part is applicable to the liquid sulphur for industrial use produced from recycled petroleum refinery gas and natural gas. For the liquid sulphur for industrial use produced by using other processes, this Part may also be referred to for implementation.

2 Normative references

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

GB 190 Packing symbol of dangerous goods

GB/T 601 Chemical reagent - Preparations of standard volumetric solutions

GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods

GB/T 2449.1 Sulphur for industrial use - Part 1: Solid product

GB/T 6003.1 Test sieves - Technical requirements and testing - Part 1: Test sieves of metal wire cloth

GB/T 6680 General rules for sampling liquid chemical products

GB/T 6682 Water for analytical laboratory use - Specification and test methods

5 Sampling

5.1.1 Sampling method

TAKE samples according to the provisions in the GB/T 6680 and the following ways.

- TAKE samples from the tankers in the infusion or discharge process. USE the method of automatic or mechanical closure to periodically take point samples.

- TAKE samples from the tanks. USE the actual loaded liquid sulphur as a benchmark. Respectively TAKE samples from the sampling ports equipped with valves in the upper, middle and lower positions. MIX the samples in equal volumes into average samples.

If there are no sampling ports but discharge openings on the tankers or tanks, TAKE samples from the discharge openings instead.

5.1.2 Sample size

The total number of samples taken shall not be less than 1kg. After solidification, MAKE the samples into the laboratory samples used for determining the inspection items, except the mass fraction of hydrogen sulfide. If the laboratory samples are more than 1kg, CRUSH them into the fragments with the diameters of less than 25mm, and thus DIVIDE them into the laboratory samples weighing 1kg.

5.1.3 Laboratory sample processing

DIVIDE the laboratory samples in equal volumes into test samples and reservation samples. Respectively PUT them into the sample bottles (sacks).

SEAL afterwards. STICK labels on the sample bottles (sacks). INDICATE the product names, batch numbers, sampling date, sampling personnel, etc. The reservation samples shall be kept for at least 30d.

5.1.4 Preparation of test samples

SMASH about 500g of test samples, until they can pass through the test sieve with the pore size of 250µm. All the test sieves being used shall conform to the requirements for R40/3 series in the GB/T 6003.1.

5.2 Sampling used for determining the mass fractions of hydrogen sulfide and hydrogen polysulfide

According to the provisions in the GB/T 6680, USE the sampling device shown in Figure 1 to take samples from the sampling ports (discharge openings) of the tankers or tanks.