The Reliability-Based Assessment of an In-Service X80 Natural Gas Pipeline in China

2014 ◽  
Author(s):  
Kai Wen ◽  
Jing Gong ◽  
Boyuan Zhao ◽  
Wenwei Zhang ◽  
Zhenyong Zhang
Keyword(s):  
Monte Carlo ◽  
Natural Gas ◽  
Reliability Analysis ◽  
Limit State ◽  
Gas Pipeline ◽  
Industrial Practice ◽  
Natural Gas Pipelines ◽  
Natural Gas Pipeline ◽  
State Models ◽  
Basic Input

Guidelines for the application of reliability-based design and assessment to natural gas pipelines were developed under PRCI sponsorship in 2005. The methodology underlying these guidelines has since been adopted as a non-mandatory Annex in the CSA Z662 standard (Annex O). Following the code in CSA Z662 Annex O, the reliability analysis of an in-service X80 pipeline in North-West China is performed using Monte Carlo technique. In this paper, the distributions of basic input parameters such as loadings, material property is derived based on the data collected from industrial practice. And the analysis of limit states, such as yielding of the defect-free pipeline, bursting of the defect-free pipeline, local buckling due to restrained thermal expansion and excessive plastic deformation, is proceeded based on these distributions. The core of reliability analysis lies in the selection and correction of limit state functions. The modification and extension of limit state models is very significant to accurately calculate probability of failure of different natural gas pipelines, so the limit state models are refined to adapt to the specific work conditions in China. A Monte Carlo reliability analysis framework capable of incorporating the data of industrial practice and limit state models has been developed and applied to the evaluation of the X80 natural gas pipeline, then a practical approximation is developed by using Monte Carlo simulation results. A practical example of an in-service X80 natural gas pipeline is presented to illustrate the availability of the reliability analysis. Furthermore, results generated by different basic input parameters in a limit state function are compared. The sensitivity analysis shows the degree of influence of various basic parameters.

scholarly journals Options of Natural Gas Pipeline Reassignment for Hydrogen: Cost Assessment for a Germany Case Study

2019 ◽  
Author(s):  
Simonas Cerniauskas ◽  
Antonio Jose Chavez Junco ◽  
Thomas Grube ◽  
Martin Robinius ◽  
Detlef Stolten
Keyword(s):  
Natural Gas ◽  
Energy System ◽  
Gas Pipeline ◽  
Cost Functions ◽  
Pipeline System ◽  
Natural Gas Pipelines ◽  
Natural Gas Pipeline ◽  
System P ◽  
Availability Constraints ◽  
Hydrogen Supply

The uncertain role of the natural gas infrastructure in the decarbonized energy system and the limitations of hydrogen blending raise the question of whether natural gas pipelines can be economically utilized for the transport of hydrogen. To investigate this question, this study derives cost functions for the selected pipeline reassignment methods. By applying geospatial hydrogen supply chain modeling, the technical and economic potential of natural gas pipeline reassignment during a hydrogen market introduction is assessed.The results of this study show a technically viable potential of more than 80% of the analyzed representative German pipeline network. By comparing the derived pipeline cost functions it could be derived that pipeline reassignment can reduce the hydrogen transmission costs by more than 60%. Finally, a countrywide analysis of pipeline availability constraints for the year 2030 shows a cost reduction of the transmission system by 30% in comparison to a newly built hydrogen pipeline system.

Prospects for the research on limit state design method of the natural gas pipeline

2015 ◽  
pp. 183-187
Author(s):  
Shaoxing Liu ◽  
Peng Yang ◽  
Dongran Zhao ◽  
Jinyuan Zhang ◽  
Yuqing Liu
Keyword(s):  
Natural Gas ◽  
Design Method ◽  
Limit State ◽  
Gas Pipeline ◽  
Limit State Design ◽  
Natural Gas Pipeline

Gas supply reliability analysis of a natural gas pipeline system considering the effects of underground gas storages

2019 ◽  
Vol 252 ◽  
pp. 113418 ◽  
Author(s):  
Weichao Yu ◽  
Jing Gong ◽  
Shangfei Song ◽  
Weihe Huang ◽  
Yichen Li ◽  
...  
Keyword(s):  
Natural Gas ◽  
Reliability Analysis ◽  
Gas Pipeline ◽  
Pipeline System ◽  
Natural Gas Pipeline ◽  
Gas Supply ◽  
Supply Reliability

scholarly journals An Investigation into the Volumetric Flow Rate Requirement of Hydrogen Transportation in Existing Natural Gas Pipelines and Its Safety Implications

Gases ◽  
2021 ◽  
Vol 1 (4) ◽  
pp. 156-179
Author(s):  
Abubakar Jibrin Abbas ◽  
Hossein Hassani ◽  
Martin Burby ◽  
Idoko Job John
Keyword(s):  
Natural Gas ◽  
Flow Rate ◽  
Compressibility Factor ◽  
Volumetric Flow Rate ◽  
Gas Pipeline ◽  
Internal Erosion ◽  
Gas Pipelines ◽  
Natural Gas Pipelines ◽  
Natural Gas Pipeline ◽  
Wide Range

As an alternative to the construction of new infrastructure, repurposing existing natural gas pipelines for hydrogen transportation has been identified as a low-cost strategy for substituting natural gas with hydrogen in the wake of the energy transition. In line with that, a 342 km, 36″ natural gas pipeline was used in this study to simulate some technical implications of delivering the same amount of energy with different blends of natural gas and hydrogen, and with 100% hydrogen. Preliminary findings from the study confirmed that a three-fold increase in volumetric flow rate would be required of hydrogen to deliver an equivalent amount of energy as natural gas. The effects of flowing hydrogen at this rate in an existing natural gas pipeline on two flow parameters (the compressibility factor and the velocity gradient) which are crucial to the safety of the pipeline were investigated. The compressibility factor behaviour revealed the presence of a wide range of values as the proportions of hydrogen and natural gas in the blends changed, signifying disparate flow behaviours and consequent varying flow challenges. The velocity profiles showed that hydrogen can be transported in natural gas pipelines via blending with natural gas by up to 40% of hydrogen in the blend without exceeding the erosional velocity limits of the pipeline. However, when the proportion of hydrogen reached 60%, the erosional velocity limit was reached at 290 km, so that beyond this distance, the pipeline would be subject to internal erosion. The use of compressor stations was shown to be effective in remedying this challenge. This study provides more insights into the volumetric and safety considerations of adopting existing natural gas pipelines for the transportation of hydrogen and blends of hydrogen and natural gas.

scholarly journals Analysis of Stresses on Buried Natural Gas Pipeline Subjected to Ground Subsidence

1998 ◽  
Author(s):  
Hyoung-Sik Kim ◽  
Woo-Sik Kim ◽  
In-Wan Bang ◽  
Kyu Hwan Oh
Keyword(s):  
Natural Gas ◽  
Gas Pipeline ◽  
Ground Subsidence ◽  
Safety Criterion ◽  
Natural Gas Pipelines ◽  
Natural Gas Pipeline ◽  
Main Pipelines ◽  
Stress And Deformation ◽  
Buried Gas Pipeline ◽  
Allowable Settlement

This study was initiated to examine the stress and deformation characteristics of the pipelines which were subjected to various environmental conditions in order to confirm their integrity. As the part of them, this paper presents the analysis results for the effect of ground subsidence combined with main loads on buried natural gas pipelines. The ground subsidence which can occur for buried gas pipeline has been classified to the three cases. Finite element method was used to analyze the effect of ground subsidence on pipeline of 26 inch (0.660 m) and 30 inch (0.762 m) diameter used as high pressure (70 Kgf/cm2(686.4 Pascal)) main pipelines. This paper shows the result of stress analysis for the pipelines subjected to those three case ground subsidence. Comparing these results with safety criterion of KOGAS (0.9 σ y), maximum allowable settlement and loads have been calculated.

Fitness-for-Service Assessment for Weldments of the Natural Gas Pipeline by Using Failure Assessment Diagram

2002 ◽  
Author(s):  
Jung-Suk Lee ◽  
Jang-Bog Ju ◽  
Jae-il Jang ◽  
Dongil Kwon ◽  
Woo-sik Kim
Keyword(s):  
Natural Gas ◽  
Fracture Mechanics ◽  
Gas Pipeline ◽  
Gas Pipelines ◽  
Service Workers ◽  
Natural Gas Pipelines ◽  
Field Service ◽  
Natural Gas Pipeline ◽  
Failure Assessment ◽  
User Friendly

There are buried natural gas pipelines of which total length amounts to about 2.1×106m in Korea, and it is very important issue to evaluate FFS (Fitness-for-service) when a crack-like flaw was found in operating pipelines. But, the research about this had not yet been performed in Korea. So, this study constructed a FFS code appropriate to Korean natural gas pipeline through comparing and analyzing API 579 and BS 7910 that are lately. In addition, we developed the user-friendly software based on FFS code, so that field service workers who have little idea about fracture mechanics can use easily. The best merit of this code is that it is possible to evaluate FFS for welding HAZ in Korea natural gas pipeline.

scholarly journals Risk Analysis on Leakage Failure of Natural Gas Pipelines by Fuzzy Bayesian Network with a Bow-Tie Model

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Xian Shan ◽  
Kang Liu ◽  
Pei-Liang Sun
Keyword(s):  
Natural Gas ◽  
Risk Analysis ◽  
Bayesian Network ◽  
Gas Pipeline ◽  
Weak Links ◽  
Gas Pipelines ◽  
Natural Gas Pipelines ◽  
Natural Gas Pipeline ◽  
Major Mode ◽  
Bow Tie

Pipeline is the major mode of natural gas transportation. Leakage of natural gas pipelines may cause explosions and fires, resulting in casualties, environmental damage, and material loss. Efficient risk analysis is of great significance for preventing and mitigating such potential accidents. The objective of this study is to present a practical risk assessment method based on Bow-tie model and Bayesian network for risk analysis of natural gas pipeline leakage. Firstly, identify the potential risk factors and consequences of the failure. Then construct the Bow-tie model, use the quantitative analysis of Bayesian network to find the weak links in the system, and make a prediction of the control measures to reduce the rate of the accident. In order to deal with the uncertainty existing in the determination of the probability of basic events, fuzzy logic method is used. Results of a case study show that the most likely causes of natural gas pipeline leakage occurrence are parties ignore signage, implicit signage, overload, and design defect of auxiliaries. Once the leakage occurs, it is most likely to result in fire and explosion. Corresponding measures taken on time will reduce the disaster degree of accidents to the least extent.

Subset simulation-based reliability analysis of the corroding natural gas pipeline

2021 ◽  
Vol 213 ◽  
pp. 107661
Author(s):  
Weichao Yu ◽  
Weihe Huang ◽  
Kai Wen ◽  
Jie Zhang ◽  
Hongfei Liu ◽  
...  
Keyword(s):  
Natural Gas ◽  
Reliability Analysis ◽  
Gas Pipeline ◽  
Subset Simulation ◽  
Natural Gas Pipeline ◽  
Simulation Based
Sign in / Sign up

Export Citation Format

Share Document