| Kundenname | Stadt | Land |
|---|---|---|
| Günter Dörner Engineering | Magdeburg | Germany |
| Gunvor Petroleum Antwerpen NV | Antwerpen | Belgium |
| Gunvor Raffinerie Ingolstadt GmbH | Kösching | Germany |
| H & G HEGMANNS Ingenieurgesellschaft mbH | Gelsenkirchen | Germany |
| H & G HEGMANNS Ingenieurgesellschaft mbH | Halle | 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 |
| HARBIN BINDA VALVE MANUFACTURE Co., LTD. | Harbin | China |
| Harbin Electric Corporation co. | Harbin | China |
| HARDWARE INFOGERANCE SAS | Nanterre | France |
| Hasenjäger & Domeyer Metallverarbeitung-GmbH & Co. KG | Celle | Germany |
| Hatch Associates LTD | Brisbane | Australia |
| Hatch Associates LTD. | Mississauga | Canada |
| Hatch Energy Ltd. | Calgary | Canada |
| Hawa Valves and Tubes Pvt. Ltd. | Navi Mumbai | India |
| Hefei General Machinery Research Institute | HF | China |
| Hefei Institute of Plasma Physics | China | |
| Henjes Metall- und Anlagenbau GmbH | Garbsen | Germany |
| Henkel AG & Co. KGaA | Düsseldorf | Germany |