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.

 

Pipe			Flange				Neck				Raised face		Screws			Weight of a flange (7,85 Kg/dm3)
Rated Diameter	d1		D	b	k	h1	d3	s	r	h2	d4	f	Number	Thread	d2	Kg
	ISO Series 1	DIN Series 2
15	-	20	95	16	65	38	30	2	4	6	45	2	4	M 12	14	0,746
	21,3	-					32
20	-	25	105	18	75	40	38	2,3	4	6	58	2	4	M 12	14	1,06
	26,9	-					40
25	-	30	115	18	85	40	42	2,6	4	6	68	2	4	M 12	14	1,29
	33,7	-					45
32	-	38	140	18	100	42	52	2,6	6	6	78	2	4	M 16	18	1,88
	42,4	-					56
40	-	44,5	150	18	110	45	60	2,6	6	7	88	3	4	M 16	18	2,33
	48,3	-					64
50	-	57	165	20	125	48	72	2,9	6	8	102	3	4	M 16	18	2,82
	60,3	-					75
65	76,1	-	185	22	145	52	90	2,9	6	10	122	3	8	M 16	18	3,74
80	88,9	-	200	24	160	58	105	3,2	8	12	138	3	8	M 16	18	4,75
100	-	108	235	24	190	65	128	3,6	8	12	162	3	8	M 20	22	6,52
	114,3	-					134
125	-	133	270	26	220	68	155	4	8	12	188	3	8	M 24	26	9,07
	139,7	-					162
150	-	159	300	28	250	75	182	4,5	10	12	218	3	8	M 24	26	11,8
	168,3	-					192
(175)	193,7	-	350	32	295	82	218	5,6	10	15	260	3	12	M 27	30	18,2
200	219,1	-	375	34	320	88	244	6,3	10	16	285	3	12	M 27	30	21,5
250	-	267	450	38	385	105	298	7,1	12	18	345	3	12	M 30	33	34,9
	273	-					306
300	323,9	-	515	42	450	115	362	8	12	18	410	4	16	M 30	33	49,7
350	355,6	-	580	46	510	125	408	8,8	12	20	465	4	16	M 33	36	68,1
	-	368
400	406,4	-	660	50	585	135	462	11	12	20	535	4	16	M 36	39	96,5
	-	419
(450)	457	-	685	50	610	135	500	12,5	12	20	560	4	20	M 36	39	99,7
500	508	-	755	52	670	140	562	14,2	12	20	615	4	20	M 39	42	117