From July, 1997, it obtained the pressure and explosion proof certification of American International Security Association UL explosion-proof fittings.

From the West in July 1997 Bell made the international quality control certification body ISO 9001: 2000 eligibility.

◎ Won the certification of ISO 9001: 2008 from SGS Taiwan in June 2008.

◎ Won the ISO 9001: 2016 certification from SGS Taiwan Inspection and Technology Corporation from June 2015 onwards.

◎ From June, 2017, we acquired the IP56 certification of Metal Industry Research and Development Center (stainless steel threading cassette).