引用本文:曾文平,敬豪,姜琛,何斌,徐冲,高金锁,等. 采用GB/T 17283测定水露点结果的精密度研究[J]. 石油与天然气化工, 2023, 52(6): 104-109.
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采用GB/T 17283测定水露点结果的精密度研究
曾文平1,2,3,敬豪1,2,3,姜琛4,何斌1,2,3,徐冲5,高金锁6,王博玮7
1.中国石油西南油气田公司天然气研究院;2.国家市场监管重点实验室(天然气质量控制和能量计量) ;3.中国石油天然气集团有限公司天然气质量控制和能量计量重点实验室;4.中国石化天然气榆济管道分公司天然气质量检测中心 ;5.中国石油西南油气田公司输气管理处;6.南京远寰科技有限公司;7.四川华油集团有限责任公司
摘要:
目的 GB/T 17283-2014是测定天然气及类似气体中水露点的重要试验方法,目前该标准没有规定测定结果的精密度,研究确定测定水露点结果的精密度指标,为标准的使用者提供检测结果一致性评判依据,同时也可为修订该标准提供技术参考。方法 采用不同仪器生产厂家和型号的8台露点仪,通过测定水气体标准物质在不同压力下的露点值进行精密度试验,参考俄罗斯标准GOST 20060-2021《天然气 水露点温度的测定》提供的测定结果重复性标准偏差的基础上,研究确定冷却镜面凝析湿度计法测定水露点结果的精密度指标。结果 按照水露点的测定范围规定测量结果的重复性限和再现性限,当水露点为-40.0 ℃≤tB≤-30.0 ℃时,重复性限≤2.0 ℃,再现性限≤3.0 ℃；当水露点为-30.0 ℃<tB≤0 ℃时,重复性限≤1.5 ℃,再现性限≤2.5 ℃；当水露点为0 ℃<tB≤10.0 ℃时,重复性限≤1.0 ℃,再现性限≤2.0 ℃。结论 为增加GB/T 17283-2014的实用性和可操作性,建议该标准增加水露点测定结果的精密度要求,提出的精密度指标可作为修订该标准的技术参考。 
关键词:  GB/T 17283  水露点  精密度  重复性限  再现性限  标准偏差 
DOI：10.3969/j.issn.1007-3426.2023.06.016
分类号:
基金项目:2022年中国石油西南油气田公司科技项目“天然气水露点在线分析仪性能评价技术及应用研究”(20230308-04)
Study on the precision of water dew point measurement results by GB/T 17283
Zeng Wenping1,2,3, Jing Hao1,2,3, Jiang Chen4, He Bin1,2,3, Xu Chong5, Gao Jinsuo6, Wang Bowei7
1. Research Institute of Natural Gas Technology of PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China;2. Key Laboratory of Natural Gas Quality Control and Energy Measurement for State Market Regulation, Chengdu, Sichuan, China;3. Key Laboratory of Natural Gas Quality and Energy Measurement, CNPC, Chengdu , Sichuan, China;4. Natural Gas Yuji Pipeline Company, Petroleum & Chemical Corporation, Jinan, Shandong, China;5. Gas Transmission Management Branch of PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China;6. Nanjing Yuanhuan Sci.&Tech.Company, LTD, Nanjing, Jiangsu, China;7. Sichuan Huayou Group Corporation, Limited, Chengdu, Sichuan, China
Abstract:
Objective GB/T 17283-2014 is an important test method for measuring the dew point in natural gas and similar gases. At present, the standard does not stipulate the precision of the measurement results. This study determines the precision index of the dew point results, which provides the consistency evaluation basis for the users of the standard, and also can provide technical reference for revising the standard. Methods Using eight dew point instruments with different instrument manufacturers and models, the precision test is carried out through testing water-gas standard substance dew points under different pressure. Referring to the repeatability standard deviation of the determination results provided by the Russian standard GOST 20060-2021 Determination of water dew point temperature of natural gas, the precision index of the results of water dew point measured by cooling mirror condensate hygrometer was studied and determined. Results The limits of repeatability and reproducibility of measurement results are specified according to the measurement range of water dew point. The water dew point is -40.0 ℃≤tB≤-30.0 ℃, the limit of repeatability is ≤2.0 ℃, and the limit of reproducibility is ≤3.0 ℃. The dew point of water is -30.0 ℃<tB≤0 ℃, the limit of repeatability is ≤1.5 ℃, and the limit of reproducibility is ≤2.5 ℃. The water dew point is 0 ℃<tB≤10.0 ℃, the repeatability limit is ≤1.0 ℃, and the reproducibility limit is ≤2.0 ℃. Conclusion sIn order to increase the practicability and operability of GB/T 17283, it is suggested that the standard should increase the precision requirement of water dew point measurement results, and the precision index proposed in this paper can be used as a technical reference for revising the standard.
Key words:  GB/T 17283  water dew point  precision  repeatability limit  reproducibility limit  standard deviation