... . 2.Acid and alkali resistant 3.High temperature resistant din 2632 welding neck flanges Welding Neck Flanges, Slip on ... , DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673B.S ... metal products15..Forged Flanges to Standard ANSI /API / AWWA / DIN / BS / JIS and etc, we can also produce as per ...