Saiki, Hunan Great Steel Pipe Co., Ltd wis diwenehi sawetara sertifikat acceptance sing diterbitake dening sawetara institusi domestik lan internasional. Kayata:

2
ISO 2020-1

Sistem Manajemen Mutu (ISO 9001)

20150804015747644764

Sertifikat Mutu (CIQ)

20150804015765306530

Societe Generale de Surveillance SA (SGS)

CE 证书