-- أرامكو                                                             - جاما للصناعة

- سابك                                                                - جوماك

- سامسونج                                                           - Gulffarabi

- SFCCL                                                          - كالما

- UNILUBE  -                                         Gulf Steel Works

- سبكيم                                                                 - KCC

- Tech Sources                                              - الخنيني للبترول

- STSCL                                                           - أمكو

- الرشيد                                                               - H K Al Sadiq   

- إمداد الصناعات                                                      - Linde Arabia

- -Dywidag Saudi Arabia                              - جاك العالمية

- Zamil ACICO                                                -  الحربي

- أزميل                                                               -  AL Ertifa

- كيمانول                                                             - Tecnicas Arabia

- بشير                                                                - Arabian Metal Product

- Cooperheat                                                - النبأ

- بن لادن                                                             - Arabian Pipe Coating

- Danieli Saudi Arabia                                   - الكومي

- جانا                                                                 - مجموعة أبناء عبد الله حسين مطوع

- Arabian Pipe Co                                          - أنابيب

- الجولف للصناعت الثقيلة                                            - Olayan Descon

- شركة ناصر سعيد الهاجري                                         - قنبر دويدغ

 Qatar Petroleum Co.   -                                    Petrol Steel Co.Ltd-