Anyị nwere nnukwu tubes alloy dị na ngwaahịa, sitere na 2inch ruo 24inch, ọkwa dị ka P9, P11 wdg iji mee ihe maka ikpo ọkụ ọkụ ọkụ ọkụ dị elu, economizer, nkụnye eji isi mee, igwe ọkụ, ọkụ ọkụ na maka ụlọ ọrụ petrochemical wdg Mejuputa nkọwapụta ndị dị mkpa. dị ka GB3087, GB/T 5310, DIN17175, EN10216, ASME SA-106M, ASME SA192M, ASME SA209M, ASME SA -210M, ASME SA -213M, ASME SA -335M, JIS G 3456, JIS G 3454, JIS, 2 GIS were gabazie.