GB 17820-2018Natural gas (English PDF)

Foreword

The full technical content of this standard is mandatory.

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB 17820-2012 "Natural Gas". The main technical changes of this standard compared with GB 17820-2012 are as follows.

---Modified the quality indicators of a class of gas and two types of gas calorific, total sulfur, hydrogen sulfide and carbon dioxide, into the natural gas of long-distance pipelines the high calorific value was changed from 31.4MJ/m3 to 34.0MJ/m3, and the total sulfur was changed from 200mg/m³ to 20mg/m³, hydrogen sulfide modified from 20mg/m³ to 6mg/m³ (see Table 1);

--- Removed the technical indicators of water dew point, in the "5 transport and use", increased the "pressure and temperature conditions at the natural gas junction the expression of liquid water and liquid hydrocarbons should not exist in natural gas (see 5.1);

--- Increased natural gas test methods GB/T 11060.2, GB/T 11060.5, GB/T 11060.8, GB/T 11060.10, GB/T 27894 (all parts), and the arbitration method for the total sulfur content in natural gas is changed from GB/T 11060.4 to GB/T 11060.8 (see 4.2);

--- Added normative references GB/T 30490, GB /Z 33440 and GB 50494, deleted GB 50028;

--- Added an informative appendix "Quality requirements for sulfur content in natural gas in some countries and regions in Europe and America" (see Appendix A);

--- Removed the 2012 edition of the informative Appendix A and Appendix B on hydrocarbon dew point and gas interchangeability.

1 Scope

This standard specifies the quality requirements, test methods and inspection rules for natural gas.

This standard applies to processed natural gas that is transported through pipelines.

2 Normative references

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

Determination of sulfur compounds in natural gas - Part 1. Determination of hydrogen sulfide content by iodometric method

Determination of sulfur compounds in natural gas - Part 2. Determination of hydrogen sulfide content by methylene blue method

Natural gas -- Determination of sulfur compounds -- Part 3. Determination of sulphur Hydrogen content

Natural gas -- Determination of sulfur content -- Part 4. Determination of total sulfur content by oxidative microcoulometry

Natural gas -- Determination of sulfur compounds -- Part 5. Determination of total sulphur content

Natural gas -- Determination of sulfur content -- Part 8. Determination of total sulfur content by ultraviolet fluoro

Natural gas -- Determination of sulfur compounds -- Part 10. Determination of sulfur compounds by gas chromatography

GB/T 11062 Calculation method for calorific value, density, relative density and Wobbe index of natural gas

GB/T 13609 Natural Gas Sampling Guidelines

GB/T 13610 Natural Gas Composition Analysis Gas Chromatography

GB/T 27894 (all parts) Natural gas is determined by gas chromatography at a certain uncertainty

GB/T 30490 Natural gas automatic sampling method

GB/Z 33440 General requirements for natural gas interchangeability into long-distance pipeline network

GB 50494 Town Gas Technical Specifications

3 Classification and quality requirements

3.1 Natural gas is classified into one type and two types according to high calorific value, total sulfur, hydrogen sulfide and carbon dioxide.

3.2 The quality requirements for natural gas should meet the requirements of Table 1.

3.3 For the quality requirements of sulfur content in natural gas in some countries and regions in Europe and America, see Appendix A.