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DIN86029 slip on(Carbon Steel) : ASTM A105, 20 #, Q235, 16 mn, With neck flat welding steel pipe flange ASTM A350 LF1, LF2 CL1 / CL2, LF3 CL1 / CL2, ASTM A694 F42, F46, F48, F50, F52, F56, the F60, ...