Brass tubes for heat exchangers Grades: Cuzn20a12, cuzn28sn1, cuzn30as acc. To pn-92 h-87025 Conformity with standards: Tubes are manufactured acc. To pn-80 h-74585, en 12451, din 1785, bs 2871, astm b111, asme sb111, gost 15527-70, nf a51-102, jis h3300 Dimensional ranges: Outside diameter [mm] wall thickness [mm] 9,5 - 22 0,80 - 0,99 10 - 35 1,00 - 1,49 11 - 45 1,50 - 2,00 15 - 45 2,01 - 2,50 25 - 45 2,51 - 3,00 Length: 2000 mm - 14000 mm For tubes 9,5 - 15 mm - length to 8000 mm, above 8000 mm length to square. Speclal certificates, approvals: - certificate of conformity with german regulations ad - 2000, merkblatt w0 trd 100, issued by rw tuv germany. - approval certificate no. Tt 226 710011 03, issued by polish register of shipping. - authorisation for manufacture of heat exchanger tubes granted by technical inspection office poland. - certificate of conformity with ue directive 97 23 ec, issued by tuv nord germany. Guarantees: Guarantee for corrosion resistance of the tubes