... small the bore. Our range weld neck flanges, welding neck flanges are normally used for high-pressure, cold or ... hot temperature. We specialize these flanges in different dimensional and material specifications based upon ... DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673B ...