| Client name | City | Country |
|---|---|---|
| Petroleum Projects and Technical Consultation Co. | New Cairo | Egypt |
| PETROLVALVES S.P.A. | Milan | Italy |
| Petrolvalves S.P.A. | Piacenza | Italy |
| Petroplus Raffinerie Ingolstadt GmbH | Kösching | Germany |
| Petrostar S.r.l. | San Maria Maddalena | Italy |
| PetroTech Sp. z o.o. | Szczecin | Poland |
| Pfeiffer Chemie-Armaturenbau GmbH | Kempen | Germany |
| Pharmatec GmbH, a Syntegon company | Dresden | Germany |
| PHOENIX Armaturenwerke GmbH | Volkmarsen | Germany |
| PIBIVIESSE S.p.A. | Nerviano | Italy |
| PICON Robinetterie industrielle | La Ravoire | France |
| Pipeline Ingenieur-Team GmbH | Leipzig-Markkleeberg | Germany |
| Pipeline Technik Insumma GmbH | Puchheim | Germany |
| PKB Ingenieurgesellschaft mbH | Gelsenkirchen | Germany |
| Plant Services, Inc. | Stafford | United States |
| plantIng GmbH | Gelsenkirchen | Germany |
| plantIng GmbH | Köln | Germany |
| PlantWare A/S | Aeroskobing | Denmark |
| Planungsbüro Klaus Bonten | Seeshaupt/Starnberger See | Germany |
| Plentiful Industrial Co., Ltd | Taipei | Taiwan, Province of China |
| Point Lisas Nitrogen Limited | Point Lisas | Trinidad and Tobago |
| Point LLC | Polotsk | Belarus |
| Pörner Ingenieurgesellschaft mbH | Grimma | Germany |
| Pörner Ingenieurgesellschaft mbH | Wien | Austria |
| Power-Tech s.r.l. | Novara | Italy |
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