| Client name | City | Country |
|---|---|---|
| GIG Karasek GmbH | Attnang-Puchheim | Austria |
| Glaunach GmbH | Klagenfurt | Austria |
| GMVT mbH | Burgau | Germany |
| Goetze KG Armaturen | Ludwigsburg | Germany |
| Goodwin International Limited | Stoke-on-Trent | United Kingdom |
| Griesemann Engineering GmbH & Co. KG | Wesseling | Germany |
| Grillo-Werke AG | Frankfurt am Main | Germany |
| Grupa LOTOS S.A. | Gdansk | Poland |
| Grutesen (privat) | Brüggen | Germany |
| Gujarat Alkalies And Chemicals Limited | Dahej | India |
| Gujarat Narmada Valley Fertilizers & Chemicals Ltd. | Bharuch | India |
| Gujarat State Fertilizers and Chemicals Limited | Vadodara | India |
| Günter Dörner Engineering | Magdeburg | Germany |
| Gunvor Petroleum Antwerpen NV | Antwerpen | Belgium |
| Gunvor Raffinerie Ingolstadt GmbH | Kösching | Germany |
| H & G HEGMANNS Ingenieurgesellschaft mbH | Halle | Germany |
| H & G HEGMANNS Ingenieurgesellschaft mbH | Gelsenkirchen | Germany |
| H&R Chemisch Pharmazeutische Spezialitäten GmbH | Salzbergen | Germany |
| H&R OWS Chemie GmbH & Co. KG | Hamburg | Germany |
| H.D. Baumann Assoc., LTD. | Portsmouth | United States |
| H.I.T.S. - Ingenieurbüro | Seligenstadt | Germany |
| Habonim Industrial Valves Ltd | Kfar Hanassi | Israel |
| Haldor Topsoe A/S | Lyngby | Denmark |
| Hallein Papier AG | Hallein | Austria |
| Hannemann & Pruss GmbH | Hannover | Germany |
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