DN8 = 2分 = 1/4 =(丝扣直径)12mm
DN10 = 3分 = 3/8 =(丝扣直径)15mm
DN15 = 4分 = 1/2 =(丝扣直径)20mm
DN20 = 6分 = 3/4 =(丝扣直径)25mm
DN25 = 1寸 = 1 =(丝扣直径)32mm
DN32 = 1.2寸 = 1 1/4 =(丝扣直径)40mm
DN40 = 1.5寸 = 1 1/2 =(丝扣直径)48mm
DN50 = 2寸 = 2 =(丝扣直径)60mm
DN65 = 2.5寸 = 2. 1/2=(丝扣直径)75mm
DN80 = 3寸 = 3 =(丝扣直径)90mm
DN100 = 4寸 = 4 =(丝扣直径)112mm