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DIN 2634 WELDING NECK FLANGE NOMINAL PRESSURE 25

Pipe		Flange				Neck				Raised face		Bolts				Weight of one flange (7.85 kg/dm3) kg.
NW	d1	D	b	k	h1	d3	s	r	h2	d4	f	No.	Thread		d2	Weight of one flange (7.85 kg/dm3) kg.
175	(191)	330	28	280	75	215	5.6	10	15	248	3	12	M24	(7/8")	27	13.4
175	193.7	330	28	280	75	218	5.6	10	15	248	3
200	216	360	30	310	80	240	6.3	10	16	278	3					17.0
200	219.1	360	30	310	80	244	6.3	10	16	278	3
250	267	425	32	370	88	292	7.1	12	18	335	3		M27	(1")	30	24.4
250	273	425	32	370	88	298	7.1	12	18	335	3
300	318	485	34	430	92	345	8	12	18	395	4	16
300	323.9	485	34	430	92	352	8	12	18	395	4					31.2
350	355.6	555	38	490	100	398	8	12	20	450	4		M30	(1-1/8")	33
350	368	555	38	490	100	398	8	12	20	450	4		M30	(1-1/8")	33	45.0
400	406.4	620	40	550	110	452	8.8	12	20	505	4
400	419	620	40	550	110	452	8.8	12	20	505	4					58.7
500	508	730	44	660	125	558	10	12	20	615	4	20	M33	(1-1/4")	36
500	521	730	44	660	125	558	10	12	20	615	4		M33	(1-1/4")	36	86.1
600	609.6	845	46	770	125	660	11	12	20	720	5		M36	(1-3/8")	39
600	622	845	46	770	125	660	11	12	20	720	5		M36	(1-3/8")	39	101