Design Adequacy for Change in Pipeline Service: A Case Study

2021 ◽  
Author(s):  
Abhinav Gupta ◽  
Tribhuwan Tyagi
Keyword(s):  
Complex Network ◽  
Wall Thickness ◽  
Sea Water ◽  
Pipe Wall ◽  
Design Parameters ◽  
Pipe Wall Thickness ◽  
Subsea Pipeline ◽  
Physical Chemical ◽  
Pipeline Project

Abstract Pipelines have proven to be the most reliable and efficient means of transportation of hydrocarbons. Different fluids from numerous sources have different physical, chemical and operational properties, thereby separate pipelines were laid for most of the fluids. However, laying of new pipelines is becoming more and more challenging with vast and complex network of existing pipelines and topographies being faced in both onshore as well as offshore. Moreover considering the huge laying costs and risks of damaging the delicate balance of flora and fauna by entering the unchartered territories, a point does arise to optimally utilize already existing massive pipeline infrastructure. In this technical paper a method has been formulated to achieve such a cause. A case study from an existing subsea pipeline project of M/s ADOC (Japan) has been presented. Existing 8 inch subsea pipeline of M/s ADOC (Japan) from Hail Site Terminal (HST) to Mubarraz Island in UAE was originally designed for gas service. However, the client intended to use the same for treated sea water service. A thorough design adequacy check was performed to convert the existing subsea gas pipeline into a liquid pipeline. In such a case it is mandatory to check the adequacy of the pipeline for the intended service and design parameters which includes checking for suitability of already selected pipe wall thickness, on-bottom stability and free spans under the action of hydrostatic and hydrodynamic forces. The methodology adopted for this project can be generalized in order to create a framework to establish a basis to use an existing pipeline for different services.

Brazilian Onshore Pipelines Rehabilitation Program

2004 ◽  
Author(s):  
Elinaldo Albuquerque Vasconcelos ◽  
Marcos Jose´ Pessoa de Resende ◽  
Jose´ Lu´cio Silva Ju´nior ◽  
Carlos Alberto Lira Menezes ◽  
Jose´ Edson Ribeiro Santos
Keyword(s):  
Wall Thickness ◽  
Pipe Wall ◽  
Rehabilitation Program ◽  
Northeastern Brazil ◽  
Pipeline System ◽  
Pipe Wall Thickness ◽  
Engineering Construction ◽  
Flow Capacity ◽  
Future Demands

The majority of the pipeline system in Brazil has more than 20 years in operation. The economy and demand for hydrocarbons, including natural gas, is growing in Brazil. Nowadays PETROBRAS-TRANSPETRO, Latin America’s largest carrier, is developing services to upgrade and rehabilitate sections of pipelines to provide compatible operational pressures with the actual and future demands for products. Services include pigging to check the pipe wall thickness, corrosion section replacement, evaluation of the class locations during the operation life of the pipeline, upgrading wall thickness where necessary and installation of new block valves. This is a case study of a 424 km pipeline in northeastern Brazil that crosses 32 municipal districts and supplies 180 direct consumers. The work included 37 replacements and upgrades that were completed in 36 days without affecting consumers. In Brazil, PETROBRAS-TRANSPETRO provides high investments for the rehabilitation of its pipelines, in order to guarantee the integrity and to increase the flow capacity. It is an important market that opens up in Latin America for engineering, construction and specialized inspection services companies.

Development of a mathematical model of the influence of wall thickness on the strain rate when profiling pipes by drawing

2020 ◽  
pp. 49-52
Author(s):  
R.A. Okulov ◽  
N.V. Semenova
Keyword(s):  
Mathematical Model ◽  
Strain Rate ◽  
Wall Thickness ◽  
Pipe Wall ◽  
Strain Intensity ◽  
Thickness Strain ◽  
Pipe Wall Thickness

The change in the intensity of the deformation of the pipe wall during profiling by drawing was studied. The dependence of the strain intensity on the wall thickness of the workpiece is obtained to predict the processing results in the production of shaped pipes with desired properties. Keywords drawing, profile pipe, wall thickness, strain rate. [email protected]

Leak Testing

2021 ◽  
pp. 143-147
Author(s):  
Charles Becht
Keyword(s):  
Wall Thickness ◽  
Pipe Wall ◽  
Piping System ◽  
Pipe Wall Thickness ◽  
Pressure Testing ◽  
Leak Testing ◽  
Piping Systems ◽  
Design Pressure ◽  
Important Test

While the exercise of pressurizing a piping system and checking for leaks is sometimes called pressure testing, the Code refers to it as leak testing. The main purpose of the test is to demonstrate that the piping can confine fluid without leaking. When the piping is leak tested at pressures above the design pressure, the test also demonstrates that the piping is strong enough to withstand the pressure. For large bore piping where the pipe wall thickness is close to the minimum required by the Code, being strong enough to withstand the pressure is an important test. For small bore piping that typically has a significant amount of extra pipe wall thickness, being strong enough is not in question. Making sure that the piping is leak free is important for all piping systems.

Simulation of Ductile Tearing in a Dissimilar Material Weld up to Pipe Wall Break-Through

2010 ◽  
Author(s):  
Philippe Gilles ◽  
Alexandre Brosse ◽  
Moi¨se Pignol
Keyword(s):  
Crack Initiation ◽  
Crack Growth ◽  
Wall Thickness ◽  
Surface Crack ◽  
Pipe Wall ◽  
Ductile Crack ◽  
Pipe Wall Thickness ◽  
Ductile Tearing ◽  
Ductile Crack Growth ◽  
Computational Analyses

This paper presents ductile initiation calculations and growth simulations of a surface crack up to pipe wall breakthrough. For validation purpose, one of the two BIMET configurations is selected. The EC program BIMET has been carried out to analyze the ductile tearing behavior of DMWs through experiments and computational analyses. In the mock-up, the initial defect is an external circumferential defect located close to the weld-ferritic interface, with a depth of one third of the wall thickness. During the test, the crack extended up to two third of the pipe wall thickness. The aim of the study is to simulate the crack initiation and growth, to compare the results with the experimental records and to continue the ductile crack growth up to pipe wall break-through.

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