Societas
Nostrae res vendibiles fervidae sunt tubi ferrei recta sutura conglutinati, tubi galvanizati, tubi quadrati et rectangulares, et tubi galvanizati quadrati et rectangulares, qui a Tianjin Youfa Steel Pipe Group Co., Ltd. suppeditantur. Haec societas sub systematibus administrationis ISO 9001, ISO 14001, ISO 45001, et ISO 50001 certificata est.
Youfa Gourp-ISO9001
Youfa Gourp-ISO14001
Youfa Gourp-ISO50001
Youfa Gourp-ISO9001
Youfa Gourp-ISO45001
Youfa Gourp-ISO50001
Youfa Gourp-ISO14001
Youfa Gourp-ISO45001
Youfa Gourp-ISO50001
Productum
Certificatum API 5l pro Tubo Chalybeo Spirali
Certificata FM pro aptatione tuborum
Certificata UL pro tubo ignifugo
Certificatum API 5CT
Certificata FM pro Fistulis Sulcatis
Ce En10219 Pro Tubo Ferreo Quadrato
Certificatum API 5L pro Tubo Lineari
Certificata EPD pro Tubis Ferreis Coniunctis
Ce En10219 Pro Tubo Rotundo Chalybeo
Certificatum ABS
CERTIFICATUM FPC
CERTIFICATUM BV
Laboratorium
Certificatum CNAS pro Laboratorio Tangshan
Certificatum CNAS pro Tianjin