You need JavaScript to view this

Managing changes of location classes of gas pipelines

Abstract

Most of the gas pipeline design codes utilize a class location system, where the design safety factor and the hydrostatic test factor are determined according to the population density in the vicinities of the pipeline route. Consequently, if an operator is requested or desires to maintain an existing gas pipeline in compliance with its design code, it will reduce the operational pressure or replace pipe sections to increase the wall thickness whenever a change in location class takes place. This article introduces an alternative methodology to deal with changes in location classes of gas pipelines. Initially, selected codes that utilize location class systems are reviewed. Afterwards, a model for the area affected by an ignition following a natural gas pipeline leak is described. Finally, a methodology to determine the MAOP and third part damage mitigation measures for gas transport pipelines that underwent changes in location class is presented. (author)
Authors:
Cunha, Sergio B; Sousa, Antonio Geraldo de [1] 
  1. PETROBRAS Transporte S.A. (TRANSPETRO), Rio de Janeiro, RJ (Brazil)
Publication Date:
Dec 19, 2009
Product Type:
Conference
Report Number:
ETDE-BR-1118
Resource Relation:
Conference: Rio pipeline 2009 conference and exposition, Rio de Janeiro, RJ (Brazil), 22-24 Sep 2009
Subject:
03 NATURAL GAS; 42 ENGINEERING; NATURAL GAS INDUSTRY; PIPELINES; NATURAL GAS DISTRIBUTION SYSTEMS; LEAKS; DAMAGE; MITIGATION; PRESSURE CONTROL
OSTI ID:
21245416
Research Organizations:
Instituto Brasileiro de Petroleo, Gas e Biocombustiveis (IBP), Rio de Janeiro, RJ (Brazil)
Country of Origin:
Brazil
Language:
English
Other Identifying Numbers:
TRN: BR0903335
Availability:
Commercial reproduction prohibited; OSTI as DE21245416
Submitting Site:
BR
Size:
9 pages
Announcement Date:
Dec 19, 2009

Citation Formats

Cunha, Sergio B, and Sousa, Antonio Geraldo de. Managing changes of location classes of gas pipelines. Brazil: N. p., 2009. Web.
Cunha, Sergio B, & Sousa, Antonio Geraldo de. Managing changes of location classes of gas pipelines. Brazil.
Cunha, Sergio B, and Sousa, Antonio Geraldo de. 2009. "Managing changes of location classes of gas pipelines." Brazil.
@misc{etde_21245416,
title = {Managing changes of location classes of gas pipelines}
author = {Cunha, Sergio B, and Sousa, Antonio Geraldo de}
abstractNote = {Most of the gas pipeline design codes utilize a class location system, where the design safety factor and the hydrostatic test factor are determined according to the population density in the vicinities of the pipeline route. Consequently, if an operator is requested or desires to maintain an existing gas pipeline in compliance with its design code, it will reduce the operational pressure or replace pipe sections to increase the wall thickness whenever a change in location class takes place. This article introduces an alternative methodology to deal with changes in location classes of gas pipelines. Initially, selected codes that utilize location class systems are reviewed. Afterwards, a model for the area affected by an ignition following a natural gas pipeline leak is described. Finally, a methodology to determine the MAOP and third part damage mitigation measures for gas transport pipelines that underwent changes in location class is presented. (author)}
place = {Brazil}
year = {2009}
month = {Dec}
}