Tianjin Yuantai Derun Group's square na rectangular welded steel pipes e nyere AAAAA ngwaahịa asambodo site na Institute of Metallurgical Industry Planning.

Dị ka ụfọdụ chọrọ nke "izu ike zuru ike" maka square na akụkụ anọ welded ọkpọkọ maka structural nzube, square na akụkụ anọ ígwè ọkpọkọ maka izugbe structural nzube, ọkọlọtọ comprehensively atụle àgwà anọgidesi, àgwà nzaghachi, ngwaahịa asambodo, nsọpụrụ awards na ngwaahịa larịị. , ikike mmesi obi ike na ọkwa ụlọ ọrụ, ikike mmepụta ihe, iguzosi ike n'ezi ụlọ ọrụ, ọkwa ọrụ, ọkwa ọkwa na ọdịnaya ndị ọzọ. Centering na nnyefe nke Enterprise ngwaahịa àgwà mmesi obi ike na ngwaahịa ika uru, ịzụlite nkà mmụta sayensị, ezi uche, elu na ọdabara ụkpụrụ ụkpụrụ, na-enye ndabere maka nzọụkwụ ọzọ nke structural nzube welded ọkpọkọ, n'ozuzu nzube oyi akpọrepu ma ọ bụ na-ekpo ọkụ akpọrepu welded ígwè anwụrụ obi siri ike. asambodo ika, zụlite ma wuo ngwaahịa nchara "akara ejiri n'aka".