1. Air Products and Chemicals Inc.
2. Approtium
3. ArcelorMittal S.A.
4. Cenergy Holdings S.A. by Viohalco S.A.
5. China National Petroleum Corporation
6. China Petrochemical Corporation
7. DNV AS
8. Enbridge Inc.
9. Engie Group
10. Equinor ASA
11. Exxon Mobil Corporation
12. Gassco AS
13. Georg Fischer Piping Systems Ltd.
14. H2 Clipper Inc.
15. Hexagon Purus ASA
16. Howden Group Limited by Chart Industries Inc.
17. JFE Steel Corporation
18. John Wood Group PLC
19. Linde PLC
20. L’Air Liquide S.A
21. Mannesmann Line Pipe GmbH by Salzgitter AG
22. N.V. Nederlandse Gasunie
23. NovoHydrogen
24. Nowega GmbH
25. NPROXX B.V.
26. Open Grid Europe GmbH
27. Pipelife International GmbH
28. ROSEN Swiss AG
29. Smartpipe Technologies
30. SoluForce B.V.
31. Southern California Gas Company by Sempra Energy
32. Strohm B.V.
33. Tata Steel Limited
34. Tenaris S.A.
35. The Pipe Line Development Company
36. The Williams Companies Inc.
37. thyssenkrupp AG
38. TotalEnergies SE
39. T?V S?D AG
40. Welspun Corp Ltd.