■ Society of Petroleum Engineers

■ The Japanese Association for Petroleum Technology

■ Petroleum Technology Development Fund

■ Alberta Used Oil Management Association

■ Alliance for the Polyurethanes Industry

■ American Carbon Society

■ American Coalition for Ethanol

■ American Gas Association

■ American Institute of Chemical Engineers

■ American Institute of Mining Engineers

■ American Methanol Institute

■ American Petroleum Institute

■ Australian Institute of Petroleum

■ Belgian Oil Federation

■ Brazilian Petroleum and Gas Institute

■ Canadian Heavy Oil Association

■ Canadian Petroleum Products Institute 

■ Center for Chemical Process Safety

■ Centre for Global Energy Studies

■ Chemical Industries Association

■ Council of Petroleum Accountants Societies

■ Danish Petroleum Industry Association

■ German Society for Petroleum Technology

■ Diesel Technology Forum

■ Electric Power Research Institute

■ EnergieNed

■ Energy Council of Canada

■ Energy Industries Council

■ Energy Technology Data Exchange

■ Eurogas - Euopean Union Natural Gas Industry

■ European Chemical Industry Council

■ European Chemical Industry Council

■ Measurement, Control and Automation Association

■ National Association of Pipe Fabricators

■ National Association of Corrosion Engineers 

■ National Energy Services Association

■ National Lubricating Grease Institute

■ Oil and Gas Products International

■ Organizacao Nacional da Industria do Petroleo

■ Pipe Fabrication Institute

■ Renewable Fuels Association

■ Research Institute of Petroleum Industry

■ Society of British Gas Industries

■ Society of Petroleum Engineers

■ The Institute of Energy Economics

■ The International Fuel Quality centre

■ UK Petroleum Industry Association

■ Unione Petrolifera

■ US Oxygenated Fuels Association

■ Western States Petroleum Association

■ World Energy Council

■ World Petroleum Congress