法兰尺寸：
DN15,DN20,DN25,DN32,DN40,DN50,DN65,DN80,DN90,DN100,DN125,DN150,DN200,DN250,DN300,DN350,DN400,DN450,DN500,DN550,DN600,DN650,DN700,DN750,DN800,DN850,DN900,DN950,DN1000,DN1200,DN2000
1，2",3，4",1"quotquot;,2"quot;,3"quot;,4",5",6",8",10",12",14",16",18",20",22",22",24",26",28",30",32",34",36",38",40",42",44",46",48"50",60",72"
&PhPhPhPhi;355.6
法兰压力：
美标00#
欧标和国标：PN0.6,PN1.0,PN1.6,PN2.5PN6,PN10,PN16,PN20,PN25,PN50,PN6.4,PN100,PN150,
PN250,PN420
日标： 1K, 2K, 5K, 10K, 16K, 20K, 30K, 40K
