| Company/Address | System | Country | Scope | Date of original | Date of certificate | Valid Untill | Status |
| Singha Muang Uthai ๙ Co.,Ltd. / 55/555 Moo 20 Soi Navanakorn 26 Phaholyothin Road, Khlong Nueng Subdistrict, Khlong Luang District, Pathum Thani Province 12120 | ISO9001:2015 | Thailand | “Manufacturing of Tapered Steel Pole for Highway Lighting, Flag Pole, Highway Guardrail and Hot Dip Galvanized Steel Conduit” | Oct 24’2021 | May 29’2025 | Oct 23 ‘2027 | Accepted |