... 316L,321,430 Grade :A / B We specialize in manufacturing seamless steel pipe for liquid conveyancestructureand boiler heat exchanging.grade:304. ... wooden caseor upon customers'requirmentsthese products are widly used in petrol,chemical,pharmacy,foodstuff,machinery,spacefight,war industry, ... -water heating parts,shiping,power and other industries.We can offer stainless steel pipe according to customers'requirements ...