国标镀锌钢管规格表我跟您说说看，DN150-ф168mm,DN200-ф219mmDN250-ф273mm,DN300-ф324mm   DN350-ф360mm,DN400-ф406mm   DN450-ф457mm,DN500-ф508mm   DN600-ф610mm,DN15-ф18mm,DN20-ф25mm   DN25-ф32mm,DN32-ф38mm   DN40-ф45mm,DN50-ф57mm   DN65-ф73mm,DN80-ф89mm   DN100-ф108mm,DN125-ф133mm   DN150-ф159mm,DN200-ф219mm   DN250-ф273mm,DN300-ф325mm   DN350-ф377mm,DN400-ф426mm   DN450-ф480mm,DN500-ф530mm   DN600-ф630mm,