DIN 2635 PN40

The Welding neck flanges is normally referred to as the high hub flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange. The welding neck flange is the best designed butt-welded flange of those currently available because of its inherent structural value. It is expensive because of the design.


DIN 2635 PN40 DIN 2635 PN40
PipeFlangeNeckRaised faceScrewsWeight of a flange
(7,85 Kg/dm3)
Rated
Diameter
d1Dbkh1d3srh2d4fNumberThreadd2Kg
ISO Series 1DIN Series 2
15-2095166538302464524M 12140,746
21,3-32
20-25105187540382,3465824M 12141,06
26,9-40
25-30115188540422,6466824M 12141,29
33,7-45
32-381401810042522,6667824M 16181,88
42,4-56
40-44,51501811045602,6678834M 16182,33
48,3-64
50-571652012548722,96810234M 16182,82
60,3-75
6576,1-1852214552902,961012238M 16183,74
8088,9-20024160581053,281213838M 16184,75
100-10823524190651283,681216238M 20226,52
114,3-134
125-1332702622068155481218838M 24269,07
139,7-162
150-15930028250751824,5101221838M 242611,8
168,3-192
(175)193,7-35032295822185,61015260312M 273018,2
200219,1-37534320882446,31016285312M 273021,5
250-267450383851052987,11218345312M 303334,9
273-306
300323,9-5154245011536281218410416M 303349,7
350355,6-580465101254088,81220465416M 333668,1
-368
400406,4-66050585135462111220535416M 363996,5
-419
(450)457-6855061013550012,51220560420M 363999,7
500508-7555267014056214,21220615420M 3942117

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Flanges General

Flanges General
A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system.

Pipe fitting

Pipe fitting
Pipe fitting is work that involves the installation or repair of pipes or tubes. Pipes and tubes are necessary for a wide range of reasons.