Standard No.:	GB 17820-2018
English Name:	Natural gas
Chinese Name:	天然气
Chinese Classification:	E24    Natural gas
Professional Classification:	GB    National Standard
Issued by:	SAMR; SAC
Issued on:	2018-11-19
Implemented on:	2019-6-1
Status:	valid
Superseding:	GB 17820-2012 Natural gas GB 17820-2012R
Language:	English
File Format:	PDF
Word Count:	3500 words
Price(USD):	60.0
Delivery:	via email in 1 business day

Natural Gas 1 Scope This standard specifies the quality requirements, test methods and inspection rules of natural gas. This standard is applicable to the processed commercial natural gas transported by pipelines. 2 Normative References The following referenced documents are indispensable for the application 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 11060.1 Natural gas — Determination of sulfur compound — Part 1: Determination of hydrogen sulfide content by iodometric titration method GB/T 11060.2 Natural gas — Determination of sulfur compound — Part 2: Determination of hydrogen sulfide content by methylene blue method GB/T 11060.3 Natural gas — Determination of sulfur compound — Part 3: Determination of hydrogen sulfide content by lead acetate reaction rate dual photo path method GB/T 11060.4 Natural gas — Determination of sulfur compound — Part 4: Determination of total sulfur content by oxidative microcoulometry method GB/T 11060.5 Natural gas — Determination of sulfur compound — Part 5: Determination of total sulfur content by hydrogenolysis and rateometric colorimetry method GB/T 11060.8 Natural gas — Determination of sulfur compounds — Part 8: Determination of total sulfur content by ultraviolet fluorescence method GB/T 11060.10 Natural gas — Determination of sulfur compounds — Part 10: Determination of sulfur compounds using gas chromatography method GB/T 11062 Natural gas — Calculation of calorific values, density, relative density and Wobbe index GB/T 13609 Natural gas sampling guidelines GB/T 13610 Analysis of natural gas composition — Gas chromatography GB/T 27894 (all parts) Natural gas — Determination of composition with defined uncertainty by gas chromatography GB/T 30490 The method for automatic sampling of natural gas GB/Z 33440 General requirements for interchangeability of natural gas entering long-distance pipeline network GB 50494 Technical code for city gas 3 Classification and Quality Requirements 3.1 Natural gas is classified into Classes I and II according to high calorific value, total sulfur, hydrogen sulfide and carbon dioxide content. 3.2 The quality requirements of natural gas shall comply with the quality requirements specified in Table 1.

Foreword II 1 Scope 2 Normative References 3 Classification and Quality Requirements 4 Test Methods and Inspection Rules 5 Transportation and Use 6 Implementation of This Standard Annex A (Informative) Quality Indexes for Sulfur Content in Natural Gas in Some European and American Countries and Regions