Flange Size Guide - DIN PN10, PN16 and ANSI 125#

PIPE SIZE NOMINAL DIAMETER Bolt circle diameter (mm)NUMBER OF HOLESBolt size (mm)Hole diameter (mm) 
DNmmInchPN10PN16ANSIPN10PN16ANSIPN10PN16ANSI PN10 PN16 ANSI
DN50 60,32″ 125125120444M16M1616181819
DN65 76,12½” 145145140444M16M1616181819
DN80 88,93″ 160160152884M16M1616181819
DN100 114,34″ 180180190888M16M1616181819
DN125 139,75″ 210210216888M16M1619181822
DN150 168,36″ 240240241888M20M2019222222
DN200 219,18″ 295295298,58128M20M2019222222
DN250 273,010″ 350355362121212M20M2422222625
DN300 323,912″ 400410432121212M20M2422222625
DN350 355,614″ 460470476161612M20M2425222628,5

Thread Size Guide - Measure the thread and get the dimension

Dimension (DN)InchExterior approx. measure thread – etcInside approx. measure thread – etc
R6⅛”109
R8¼”1312
R10⅜”1715
R15½”2119
R20¾”2724
R251″3430
R321¼”4239
R401½”4845
R502″6057
R652½”7672
R803″8985
R1004″114110

Size guide for pipe dimensions - Outside diameter

DNmmTum
DN610,2⅛”
DN813,5¼”
DN1017,2⅜”
DN1521,3½”
DN2026,9¾”
DN2533,71″
DN3242,41¼”
DN4048,31½”
DN50 60,32″
DN65 76,12½”
DN80 88,93″
DN100 114,34″
DN125 139,75″
DN150 168,36″
DN200 219,18″
DN250 273,010″
DN300 323,912″
DN350 355,614″
DN400406,416″
DN450457,218″
DN500508,020″