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MAOP Validation at Southern Company Gas

AGA Operations Conference

May 2017

Opening Comments

❖Government Regulation

❖Pipeline Installations and Records

❖Notice of Proposed Rulemaking – Pipeline Safety

❖Gaining Asset Knowledge

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Agenda

The Southern Company Gas approach to MAOP Validation

❖ Company Background

❖ MAOP Validation Objectives

❖ Method Used

❖ Forecasted Life After MAOP Validation

Company Background

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❖ Operate in 11 States

❖ Comprised from Several Companies

❖ Transmission, Distribution, UGS, CNG, LNG Facilities

CV StorageColusa County, CA

Golden Triangle StorageBeaumont, TX

Pivotal LNGHouston, TX

Jefferson Island StorageErath, LA

Pivotal LNGTrussville, AL

Florida City GasHialeah, FL

Atlanta Gas LightAtlanta, GA

Chattanooga GasChattanooga, TN

Virginia Natural GasVirginia Beach, VA

Elkton GasElkton, MD

Elizabethtown GasUnion, NJ

Nicor GasNaperville, IL

MAOP Validation Objectives

Anticipated Code Changes

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§ 192.607 Verification of Pipeline Material

§ 192.624 Maximum allowable operating pressure verification


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Targeted Assets

❖ 2,611 Transmission Miles

❖ 594 Stations• Regulator Stations• Terminals• CNG/LNG Facilities• UGS Facilities• Compressor Stations


1. Provide Optics• Obtain Information to allow

for meaningful prioritizationof findings

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2. GIS Modernization• Updated with detailed

features data

• Implement a process to continually update GIS at the feature level

Method Used

Foundational Activities

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❖ Single Records Repository • Records Review & Staging

❖ PFL / SFL Templates

❖ Prioritization of PFL Build

❖ Assumptions (Proxy Values)

❖ Issues Resolution

❖ Pilot Build

❖ Etc.

❖ GIS db

The time to repair the roof is when the sun is shining.

JFK

Method Used

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Source Records(i.e. Project Documents)

Opportunities for

Modernization & Short Term Resolutions

GIS

PFL / SFL Build and

MAOP Calculations

Improved Asset Knowledge for

use by Southern

Company Gas Operations

Longer Term Enhancements

Company Derived

Proxy ValuesGIS Features:- Feature

based- MAOP

Calculator

Process Flow

Life After MAOP Validation

Objective 1 – Optics on Issues

❖Greater level of asset knowledge after MAOP Validation

❖Decision Trees will be established to Prioritize longer-term resolutions

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Longer Term Enhancements

Opportunities for

Modernization & Short Term Enhancements


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MAOP Validation

Dataset

Capacity to

Serve

Customers

❖ System Reliability

Excellent Asset

Knowledge

❖ Enhance Piggability

❖ Path to Zero Proxy Values

Regulatory

Compliance

❖ Post ’70 Pipe Without a Test

❖ Valve Spacing

Reduced Risk

❖ Pre ’70 ERW Pipe

❖ Early Era AO Smith Pipe

❖ SSAW Pipe


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Projects Require Justification &

Extents Rationale

MAOP Validation

Dataset

Decision Trees

HTs

Categorized Projects

Replace Uprates


Objective 2 - GIS Modernization

❖As-Builts have to be feature based

❖Method for Loading into GIS

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GIS

Summary

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Southern Company Gas:

❖ Is repairing the roof while the sun is shining

❖ Started MAOP Validation with the End-in-Mind

❖ Has employed, and continues to build as needed, sound processes & technology to meet the stated Objectives

Questions?

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