GB/T 42864-2023Sampling facilities and sampling performance testing of liquefied natural gas (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

Introduction

Liquefied natural gas (LNG) is an ultra-low temperature, multi-component mixed light hydrocarbon liquid. It is extremely susceptible to pressure, temperature and environmental conditions during transportation and use.

Evaporation occurs in advance due to the influence of components. Compared with gaseous natural gas sampling, the determination of LNG's composition, calorific value, density, water dew point and other quality indicators Accuracy depends heavily on the performance of the LNG sampling facility. Among them, the extraction and gasification of LNG, the collection of gasified natural gas samples, Packaging and the control of the entire process are key links.

In addition to the mature LNG sampling facilities used in LNG receiving terminals, natural gas liquefaction plants, LNG bunkering ships (stations), gasification satellite stations, LNG tanks, floating liquefied natural gas (FLNG), floating regasification units (FSRU) and other links also need to be LNG components are transferred for metering or quality monitoring.

This document provides LNG sampling methods for each link in the LNG industry chain, and proposes the design, testing, acceptance and use of LNG sampling facilities.

The purpose of the evaluation requirements is to improve the representativeness of LNG sampling and the stability of LNG sampling facilities, and to ensure the handover measurement and quality supervision of LNG. The control was successfully completed.

This document does not address all safety issues related to its application. Before using this document, the user is responsible for formulating appropriate safety and protective measures and clarify their limited scope of application. Liquefied natural gas sampling facilities and sampling performance inspection

1 Scope

This document specifies the sampling methods, technical requirements for sampling facilities, testing and acceptance, and performance evaluation of liquefied natural gas (LNG) Require.

This document applies to LNG receiving stations, natural gas liquefaction plants, LNG bunkering ships (stations), gasification satellite stations, LNG tanks, etc. Handover measurement and quality control during delivery.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 13609-2017 Natural Gas Sampling Guidelines

GB/T 20603-2006 Continuous sampling method for refrigerated light hydrocarbon fluid liquefied natural gas

GB/T 24925 Technical conditions for cryogenic valves

GB/T 30490 Natural gas automatic sampling method

NB/T 47013.2 Non-destructive testing of pressure equipment Part 2: Radiographic testing

3 Terms and definitions

The following terms and definitions apply to this document.