ATCO Pipelines

Berkshire Hathaway Energy Gas Transmission and Storage

Boardwalk Pipelines

Buckeye Partners, L.P.

Chevron Pipe Line Company

Colonial Pipeline Company

ConocoPhillips

Enbridge Pipelines Inc. and Enbridge Energy Partners LP

Energy Transfer

Enterprise Products

ExxonMobil Pipeline Company

Flint Hills Resources

Gassco A.S.

GRTgaz

Kinder Morgan

Marathon Pipe Line LLC

N.V. Nederlandse Gasunie

National Fuel Gas Supply Corporation

National Gas

ONEOK

Phillips 66 Pipeline LLC

PipeChina North Pipeline Company

Plains All American Pipeline, LP

Saudi Aramco

Shell Global

Southern California Gas Company

Storengy

TC Energy

TotalEnergies

Trans Mountain Canada Inc.

TransGas Limited

Williams Companies, Inc.

Baker Hughes

China Petroleum Pipeline Engineering Co., Ltd. (CPP)

DNV

Previan

The ROSEN Group

Ageion Corporation

ArcelorMittal

Baoshan Iron & Steel Co., Ltd.

CBMM Technology Suisse SA

CNPC Tubular Goods Research Institute

Cybernetix

Emerson Process Management

Endress+Hauser

Enduro Pipeline Services, Inc.

Evraz North America

JFE Steel Corporation

KROHNE, Inc.

Mears Group, Inc.

Saipem

SICK

Siemens Energy Inc.

Solar Tubines, Inc.

T.D. Williamson

TechnipFMC

Worley Group

American Petroleum Institute

Australian Pipelines & Gas Association - Research & Standards Committee

Liquid Energy Pipelines Association

Operations Technology Development