... & Thread FlangesOur Flanges are drilled (machined) with the wall thickness of the flange having the same dimensions of the matching pipe. ... small the bore. Our range weld neck flanges, welding neck flanges are normally used for high-pressure, cold ... DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673B ...