GB/T 23938-2021High purity carbon dioxide (English PDF)

1 Scope

This document specifies the requirements for technical indicators, inspection rules, sampling, marking, packaging, storage, transportation, filling and safety warning of high purity carbon dioxide, and describes the test methods of high purity carbon dioxide.

This document is applicable to the carbon dioxide with a purity greater than or equal to 99.99% (mole fraction), which is prepared by purifying industrial carbon dioxide, industrial tail gas and food additive liquid carbon dioxide.

2 Normative references

The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 150 (All parts) Pressure vessels

GB 190 Packing symbol of dangerous goods

GB/T 3723 Sampling of chemical products for industrial use - Safety in sampling

GB/T 5099.1 Seamless steel gas cylinders - Part 1: Quenched and tempered steel cylinders with tensile strength less than 1100MPa

GB/T 5099.3 Seamless steel gas cylinders - Part 3: Normalized cylinders

GB/T 5099.4 Seamless steel gas cylinders - Part 4: Seamless stainless steel gas cylinders

GB/T 5832.1 Gas analysis - Determination of moisture - Part 1: Electrolytic method

GB/T 5832.2 Gas analysis - Determination of moisture - Part 2: Dew point method

GB/T 5832.3 Determination of moisture in gases - Part 3: The method of cavity ring-down spectroscopy

GB/T 6285 Determination of trace oxygen in gases - Electrochemical method

GB/T 6681 General rules for sampling solid chemical products

GB/T 7144 Coloured cylinder mark for gases

GB/T 8984 Determination of carbon monoxide, carbon dioxide and hydrocarbon in gases - Gas chromatographic method

GB/T 11640 Seamless aluminum alloy gas cylinders

GB/T 14193 Rules for filling of liquefied gas cylinders

GB 15258 General rules for preparation of precautionary label for industrial chemicals

GB/T 16804 Precautionary labels for gas cylinders

GB/T 24159 Welded insulated cylinders

GB/T 28726 Gas analysis - Gas chromatograph with helium ionization detector

GB/T 30685 Technical requirements for vertical road transportation of cylinder

GB/T 34525 Safety rules for handling, loading and unloading, storing and using of cylinder

GB/T 35528 Safety guidelines for cryogenic liquefied gases

JB/T 6898 Cryogenic liquid storage and transportation equipment - Safety regulation for operation

NB/T 47058 Road tankers for refrigerated liquefied gas

TSG R0005 Supervision regulation on safety technology for transportable pressure vessel

TSG 23 Regulation on safety technology for gas cylinder

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

4 Technical indicators

The requirements of Table 1 shall be met.

Table 1 Technical indicator requirements

Item Indicator

Carbon dioxide (CO2) purity (mole fraction)/10-2 >=99.99 >=99.995 >=99.999

Hydrogen (H2) content (mole fraction)/10-6 <5 <2 <0.5

Oxygen (O2) content (mole fraction)/10-6 <10 <5 <1

Nitrogen (N2) content (mole fraction)/10-6 <60 <30 <3

Carbon monoxide (CO) content (mole fraction)/10-6 <5 <2 <0.5

Total hydrocarbon (THC) content (by methane, mole fraction)/10-6 <5 <3 <2

Moisture (H2O) content (mole fraction)/10-6 <15 <8 <3

Total sulfur content (by sulfur, mole fraction)/10-6 To be determined by the supplier and the purchaser through negotiation […]