Applies in conjunction with DIN 3352 Part 1 for overall lengths, pipe connection and space requirement dimensions, forms, equipment, materials, testing and marking of gate valves of stainless steel with external stem thread for general use in nominal widths of DN 40 to DN 1000 for PN 10 and PN16; DN 40 to DN 500 for PN 25, PN40, PN63 and PN 100.