| Advanced Drainage Systems Inc. |
| Advanced Plastic Industries SAL |
| ADVANTICA |
| AEI Compounds |
| Agici Finanza d/'Impresa |
| AGRU Kunststofftechnik GmbH |
| Al Aziz Plastics Pvt. Ltd. |
| Aliaxis |
| Aliaxis R&D |
| Alphacan |
| Amanco Brasil Ltda |
| AMI Ltd. |
| ARGB |
| ARKEMA Inc. |
| AseTUB |
| Asset International Ltd. |
| Baerlocher GmbH |
| Basell Polyolefine GmbH |
| Basell Sales&M BV |
| Battenfeld Extrusionstechnik GmbH |
| Becetel VZW |
| Bodycote PDL |
| Borealis |
| Borealis AB |
| Borealis AG |
| Borealis Deutschland GmbH |
| Borealis Polyolefine GmbH |
| Borouge Hong Kong Ltd. Beijing Representative Offi |
| Borouge India Pvt Ltd |
| Borouge NZ Ltd. |
| Borouge PTE |
| Borouge Pte Limited |
| Borouge Pte Ltd |
| Borouge Singapore |
| BorsodChem Zrt |
| Borusan Mannesmann |
| British Plastics Federation Plastics Pipes Group |
| Brno University of technology |
| BU-PPS |
| Bureau Leiding |
| Cabot |
| Chemson Polymer-Additive AG |
| Chimiplast AD |
| China Petroleum&Chemical Corp. |
| China Plastics Processing Industry Association |
| CIAAC Rotoplas SA de CV |
| Cincinnati Extrusion GmbH |
| COES Spa |
| Comphania de Saneamento Básico Estado Sao Paolo(SA |
| Corma Deutschland GmbH |
| Corporate Synergies Ltd |
| Cosmoplast Industrial Co. |
| CSIRO Australia |
| Dep. of Engineering Sciences and Methods Uni. M. |
| Devorex Ltd. |
| Dow Chemical Company |
| DOW Chemical Iberica |
| Dow Corning Europe s.a. |
| DOW Europe GmbH |
| Drossbach GmbH |
| DSM |
| Dyka Plastics |
| Eandis |
| Elkem Materials |
| EL Robinson Engineering |
| Emtelle UK Limited |
| Energy Technology Laboratories, Osaka Gas Co. |
| Engineering Mechanics Corp of Colombus |
| Evonik Degussa GmbH |
| Finnish Plastics Industries Federation |
| Friatec AG |
| Georg Fischer Piping Systems Ltd |
| Gerodur MPM Kunststoffverarbeitung GmbH |
| GPS PE Pipe Systems |
| Gulf Plastics Pipes Academy |
| HALCOR S.A. |
| Hannam University |
| Harvey Water |
| HESSEL Ingenieurtechnik GmbH |
| Hewing GmbH |
| IFP |
| Impact Laboratories |
| Imperial College London |
| Industrial Products Division |
| INEOS |
| Ineos O&P USA |
| INEOS Polyolefins Europe |
| Ineos Vinyls Deutschland GmbH |
| INEOS Vinyls UK Ltd |
| Inno-Comp |
| Integrated Packaging System |
| IPEX Inc. |
| Ipiranga Petroquímica SA |
| IPT Institut für Prueftechnik GmbH &Co. KG |
| IRPC Public Company |
| ISCO Industries |
| Jana Laboratories Inc. |
| Japan Polyethylene Corporation |
| Kanaflex S/A |
| Kiwa Certification |
| Kiwa Gas Technology B.V. |
| KraussMaffei Technologies GmbH |
| KWH Pipe Ltd |
| Laboratorie national de metrologie et d'essais |
| LK PEX AB |
| Lubrizol Advanced Materials Europe BVBA |
| Lycro AS Norway |
| LyondellBasell |
| LyondellBasell Industries |
| Maincor AG |
| Marley Plumbing and Drainage |
| McElroy Manufacturing Inc. |
| MESCO Inc. |
| Molecor Tecnologia S.L. |
| North BinhMinh Plastics Co. |
| NPG |
| NSF International |
| OFI Technologie&Innovation Gmbh |
| Oil&Gas Vertical magazine |
| Omya |
| Orion Fittings |
| Palermo Plastics Pipe Consulting |
| Palplast SA |
| Passeport Environnement |
| Pavco |
| Performance Pipe |
| Pex Association |
| Philmac |
| Pipe Coil Technology |
| Pipelife |
| Pipelife Austria Gmbh &CO KG |
| Pipelife International |
| Pipelife Norge AS |
| Plastic Pipe Institute |
| Plastic Sales&Distribution Pty Ltd |
| Plastics Pipe Institute |
| POLOPLAST GmbH&Co.KG |
| Poly-Beek Kunststoffe GmbH |
| Polymer Competence Center Leoben GmbH |
| Polymer Institute Brno |
| Polypipe Civils |
| PolyPipe Inc |
| POLYPLASTIC GROUP |
| PP&C-Lab |
| PPI Corporation Pty Ltd |
| PPP Piping Systems Ltd |
| Purator Hungaria Környezetvédelmi Kft. |
| PVC4PIPES |
| Qenos |
| REHAU |
| Repsol YPF |
| Rohm and Haas |
| Rollepaal BV |
| Sabic Deutschland GmbH |
| SABIC Europe |
| SABIC Hungary Kft. |
| SABIC Innovative Plastics Ker. Kft. |
| Sabic Petrochemicals |
| Sappma |
| SCG Plastic Company |
| School of Materials Science&Engineering UNSW |
| SHB Consulting |
| SICA S.p.A. |
| Silon Compounds Ltd. |
| Silon International GmbH |
| SILON s.r.o. |
| SKZ -TeConA GmbH |
| Solvay Advanced Polymers GmbH |
| Solvay Padanaplast |
| Solvay Solexis |
| SOLVIN S.A. |
| Sotra-Seperef |
| STR Marketing Ltee |
| Suez Environnement/Cirsee |
| Tecnomatic SRL Unipersonale |
| TGM |
| Thai Polyethylene Co. Ltd |
| Thames Water |
| Tigre S.A. Tubos e Conexes |
| Tokyo Gas Co. Ltd. |
| Total Petrochemicals |
| Total Petrochemicals Research Feluy |
| TVK Plc. |
| Tyco Plastic Pipe Systems |
| UBE Industries ltd. |
| Underground Solutions Inc. |
| United for Developed Industries |
| University of Leoben |
| University of Queensland |
| Uponor Group |
| Viega GmbH & Co. KG |
| Vinidex PTY Limited |
| Wacker Chemie AG |
| Wavin Hungary Kft. |
| Wavin Overseas |
| Wavin Poland |
| Wavin Technology&Innovation BV |
| WIDOS GmbH |
