galvanized steel tube flang Size: from 1/2 to 200 inch ... , JIS, EN, JB, GB, HG, UNI, API galvanized steel tube flang Technics: Forged Size: from 1/2 to 200 inch ... Class2500, Wnrf, Sorf, Blrf, Thrf, Swrf, Ljrf Carbon Steel FlangeDin2573 Pn6 Slip-On, Din2576 Pn10 Slip-On, Din2543 Pn16 ... : connecting pipe line and keep its leakproofness; convenient for replacing pipe line; easy to separate and check the ...