High Grade Steel Pipeline for Long Distance Natural Gas Projects

2015 ◽  
Author(s):  
Tiziana Cheldi ◽  
Michele Castano ◽  
Carlo Maria Spinelli
Keyword(s):  
Natural Gas ◽  
High Grade ◽  
Long Distance ◽  
Steel Pipeline ◽  
Grade Steel

scholarly journals Experimental Research on Fatigue Properties of X80 Pipeline Steel for Synthetic Natural Gas Transmission

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Li Yan–hua ◽  
Feng Hui ◽  
Chi Qiang ◽  
Fei Fan ◽  
Gao Xiong-xiong ◽  
...  
Keyword(s):  
Natural Gas ◽  
Base Metal ◽  
Hydrogen Content ◽  
Volume Fraction ◽  
Pipeline Steel ◽  
Fatigue Properties ◽  
High Grade ◽  
Long Distance ◽  
X80 Pipeline Steel ◽  
Synthetic Natural Gas

In recent years, many synthetic natural gas demonstration projects have been put into operation all over the world, and hydrogen is usually contained in synthetic natural gas. X80 is the most commonly used high-grade pipeline steel in the construction of natural gas pipelines. The compatibility between high-grade pipeline steel and hydrogen directly affects safety and reliability of long-distance pipelines. Therefore, in order to study the effect of hydrogen content on fatigue properties of high-grade pipeline steel, fatigue specimens were taken from base metal, spiral welds, and girth weld of submerged arc spiral welded pipes, respectively. Specifically, the total pressure was 12 MPa and hydrogen content was from 0 to 5vol%. Experimental results indicate that the hydrogen significantly increases the fatigue crack growth rate for both base metal, spiral weld, and heat-affected zone of X80 pipeline steel for about ten times compared with reference environment nitrogen, hydrogen would greatly reduce the fatigue life of the X80 pipeline steel, and the fatigue lifetime would decrease with the increase in hydrogen volume fraction. In order to ensure the safe operation of SNG pipeline, the hydrogen content should be controlled as low as possible.

An Approach to Coating and Cathodic Protection Design on Long Distance Gas Pipeline

2004 ◽  
Author(s):  
Luca Bacchi ◽  
Fabio Brugnetti ◽  
Michele Castano ◽  
Fabio Zanardo
Keyword(s):  
High Pressure ◽  
Cathodic Protection ◽  
New Technologies ◽  
High Capacity ◽  
Gas Pipeline ◽  
Point Of View ◽  
High Grade ◽  
Long Distance ◽  
Inspection And Maintenance ◽  
Grade Steel

Eni group is working on a gas transportation project aimed to develop and verify the technology for a “LD-HC-HP-HG” (Long Distance–High Capacity–High Pressure–High Grade) gas pipeline named TAP (Trasporto Alta Pressione). Interest in high pressure and high grade pipe steels is due to the increasing necessity of economic gas transportation on long distances between upstream and downstream in an international context. In the past Eni group has already studied long distance pipeline materials from the economic and pre-feasibility point of view. Now, with TAP project, Eni is going to do an “in field experience” with high pressure and high grade steels to concur and to promote the “gas to market” with the “pipeline” option. Snam Rete Gas competences in the project are related to: • partial contribution to the technical characterization of field welding joints; • analysis of solutions for coating and cathodic protection especially dedicated for long distance pipelines. The building of a pilot pipeline in X100 grade steel is an opportunity to test new technologies and new instrumentations to economically prevent corrosion with coating and cathodic protection in long distance pipelines where there could be logistic problems for the systems inspection and maintenance due also to the extreme environmental conditions. Design of the system solutions according to a “life cycle costing” approach and analysis of the experimental results of the pilot pipeline in X100 grade steel will be both included in the project. Aim of this paper is to suggest an experimental approach to coating and cathodic protection design on long distance gas pipeline in order to minimize inspection and maintenance costs, very relevant for such a type of application.

Effectiveness of Ultraviolet Light For Mitigating Risk of Microbiologically Influenced Corrosion in Steel Pipeline

2015 ◽  
Vol 74 (4) ◽  
Author(s):  
M. K. F. M. Ali ◽  
N. Md. Noor ◽  
N. Yahaya ◽  
A. A. Bakar ◽  
M. Ismail
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Microbiologically Influenced Corrosion ◽  
Metal Loss ◽  
Desulfovibrio Vulgaris ◽  
Pipeline System ◽  
Long Distance ◽  
Gas Industry ◽  
Internal Corrosion ◽  
Steel Pipeline

Pipelines play an extremely important role in the transportation of gases and liquids over long distance throughout the world. Internal corrosion due to microbiologically influenced corrosion (MIC) is one of the major integrity problems in oil and gas industry and is responsible for most of the internal corrosion in transportation pipelines. The presence of microorganisms such as sulfate reducing bacteria (SRB) in pipeline system has raised deep concern within the oil and gas industry. Biocide treatment and cathodic protection are commonly used to control MIC. However, the solution is too expensive and may create environmental problems by being too corrosive. Recently, Ultraviolet (UV) as one of the benign techniques to enhance mitigation of MIC risk in pipeline system has gained interest among researchers. An amount of 100 ml of modified Baar’s medium and 5 ml of Desulfovibrio vulgaris (strain 7577) seeds was grown in 125 ml anaerobic vials with carbon steel grade API 5L-X70 coupons at the optimum temperature of 37°C and pH 9.5 for fifteen days. This was then followed by exposing the medium to UV for one hour. Results from present study showed that UV radiation has the ability to disinfect bacteria, hence minimizing the risk of metal loss due to corrosion in steel pipeline. 

Through-wall yield ductile burst pressure of high-grade steel tube and casing with and without corroded defect

2020 ◽  
pp. 102902
Author(s):  
Deng Kuanhai ◽  
Peng Yang ◽  
Liu Bing ◽  
Lin Yuanhua ◽  
Wang Jiandong
Keyword(s):  
Steel Tube ◽  
Burst Pressure ◽  
High Grade ◽  
Grade Steel

Design and Implementation of the Airborne Laser Effector for Autonomous Pipeline Alignment

2014 ◽  
Vol 496-500 ◽  
pp. 1327-1332
Author(s):  
Hai Fang Liu ◽  
Rui Wang ◽  
Shi Sheng Zhong
Keyword(s):  
Natural Gas ◽  
Control Algorithm ◽  
Gas Pipeline ◽  
Remote Detection ◽  
Long Distance ◽  
Natural Gas Pipeline ◽  
Modular Software ◽  
Airborne Laser ◽  
Design Requirements ◽  
And Control

Abstract. High-accuracy beam pointing is one of the key problems in the airborne laser remote sensing of natural gas pipeline leak. In response to the domestic demand for the long-distance natural pipeline leak detection, this study proposes an airborne laser effector for autonomous pipeline alignment based on CH4/H2S detector. Mainly structured on 2DOF serial mechanism, the device under discussion is designed with a control system operated on IPC and PMAC, followed by the design of hierarchical modular software. Once completed, the device is placed for indoors pointing experiments as well as simulated airborne test. The results show the effector can conduct full-angle scan of the pod area, achieve a static measuring precision of less than 0.4m as an alignment point is about 100 meters from the laser and detect leakage in dynamic simulated experiment, which meets with the design requirements. In other words, both the design and control algorithm are proved to be feasible. The effector holds an important engineering value for solving the problem of remote detection of the natural gas pipeline leakage.

Optimization of Long Distance Natural Gas Pipeline Design Proposals Based on Multi-Objective AHM Method

2013 ◽  
Vol 756-759 ◽  
pp. 4309-4313
Author(s):  
Feng Juan Dong ◽  
Xue Fei Lu
Keyword(s):  
Natural Gas ◽  
Pressure Ratio ◽  
Gas Pipeline ◽  
New Method ◽  
Long Distance ◽  
Natural Gas Pipeline ◽  
Delivery Pressure ◽  
Design Case ◽  
Pipeline Design ◽  
Assessment Result

the new method-AHM, and nine parameters which included diameter, delivery pressure, pressure ratio of the first station, pressure ratios of intermediate stations, number of stations, investment costs of pipeline ,investment costs of stations, investment costs of operation ,equivalent cost, have been selected to evaluate design projects of the long distance natural gas pipeline. The results indicate that attribute AHM matches other methods well. The calculation result of the example indicates that AHM method can get a good assessment result for the multifactor and multi-hierarchy complicated problems. The study provides a new method and technique for designers to select the technical feasible and economic reasonable design case, which has some theoretical and practical value.

Quantitative Risk Analysis for Natural Gas Long-Distance Pipeline Leakage

2014 ◽  
Vol 1030-1032 ◽  
pp. 661-664
Author(s):  
Zhe Zuo
Keyword(s):  
Numerical Simulation ◽  
Risk Assessment ◽  
Natural Gas ◽  
Emergency Response ◽  
Necessary Conditions ◽  
Quantitative Risk Assessment ◽  
Safe Operation ◽  
Long Distance ◽  
Main Factors ◽  
Accident Scenarios

The risk of natural gas long-distance pipeline and main factors of accidents are analyzed in this paper. According the consequences from above, quantitative risk assessment of long-distance pipelines under specific accident scenarios are completed with the help of numerical simulation model on long-distance pipeline leakage and dispersion. What’s more, on the basis of the assessment results, the necessary conditions for long-distance pipeline safe operation are presented. Finally, conclusions and safe operations under necessary conditions given in this paper are helpful for regular operation of pipeline, accident prevention, emergency response and reasonable supervision.

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