New Measurement Data Has Implications For Quantifying Natural Gas Losses From Cast Iron Distribution Mains

By Carey Bylin, Luigi Cassab, Adilson Cazarini, Danilo Ori, Don Robinson and Doug Sechler | September 2009 Vol. 236 No. 9

Adilson Cazarini is responsible for all the Control System of Comgás Distribution Network, and leads the Control Room Area coordinating issues: natural gas supply and odorization, Loss Unaccounted Gas (LUAG) and distribution volumes estimation.

Danilo Ori is responsible for the operational remote control of Comgás’ distribution network and concentration control of odorant used for distribution of natural gas. He graduated in Mechanical Engineering at Maua School of Engineering, and in 2009.

Don Robinson
is vice president of ICF International and manages the Oil & Gas Technology Group. For over 27 years he worked in the petroleum industry, both domestic and abroad, upstream and downstream, at Chevron, Arabian American Oil Company in Saudi Arabia and Mobil Oil Corporation.

Doug Sechler is an associate consultant with the Oil & Gas Technology Group in ICF International. Much of his work has been dedicated to scoping greenhouse gas emissions and analyzing mitigation strategies. He received a B.S. degree in Chemical Engineering and a minor in Chemistry from Penn State University.


1 EPA. Inventory of U.S. Greenhouse Gas Emissions and Links: 1990 – 2007. April 2009. . 8.99 Bcf emissions from cast iron distribution mains. Methane emissions adjusted to gas losses by 40.3% that was lost, but oxidized in soil; and only 93.4% of gas is methane.

2 EIA. Natural Gas Prices. April 29, 2009. .

3 EIA. Natural Gas Consumption by End Use. April 29, 2009. . Average gas price is calculated by weighted average of EIA 2007 reported natural gas prices for end use, with 2007 end use consumption volumes as weight. Average price is $9.27/Mcf.

4 EPA/GRI. Methane Emissions from the Natural Gas Industry. Volume 9: Underground Pipelines. June 1996. .

5 IPCC. 2006 IPCC Guidelines for National Greenhouse Gas Inventories. .

6 EPA. Natural Gas STAR: Methane Emission Reduction Opportunities for Local Distribution Companies. July 16, 2008; slide 24. .

7 Con Edison. CISBOT – Cast Iron Joint Sealing Robot. Presented at Natural Gas STAR 2008 Annual Implementation Workshop. .

8 Starline TT. CIP Liners for Mains. 1999. .

9 PIM Corporation. Rolldown Pipeline Renewal. .

10 PIM Corporation. Subline Pipeline Renewal. .

11 Con Edison, Natural Gas STAR. Methane Emission Reduction Opportunities for Local Distribution Companies. July 16, 2008. .