DIN 2633 PN16 WELDING NECK FLANGE

The DIN 2633 PN16 Welding Neck Flange is a German standard flange designed for pipeline systems operating at a nominal pressure of 16 bar (PN16). It is widely used in industries such as petrochemical, water treatment, shipbuilding, and mechanical engineering due to its reliable leak-proof connection and high strength under pressure.

Key Features of DIN 2633 PN16 Welding Neck Flange:

Standard: DIN 2633 (Deutsches Institut für Normung)
Type: Welding Neck Flange (Welded at the neck to match pipe bore)
Pressure Rating: PN16 (16 bar ≈ 232 psi)
Facing Type: Raised Face (RF) or Flat Face (FF)
Flange Type Code (DIN): EN 1092-1 Typ 11
Welding Type: Butt-welded to pipe, ensuring a smooth flow transition
Applications: Suitable for high-pressure and high-temperature piping systems

DIN 2633 PN 16 Flange WNRF

DIN flange- the German Institute for Standardization, is a private organization providing standardization services in Germany.Now all the weld neck flange are refer to EN 1092-1 Type 11,below is the DIN weld neck flange vs EN 1092-1 type 11 Flange

DIN Weld neck Flange standard reference

Description	Old DIN standard	New EN standard	Type	Pressure
Welding neck flange	DIN 2631	EN 1092-1	11	PN6
Welding neck flange	DIN 2632	EN 1092-1	11	PN10
Welding neck flange	DIN 2633	EN 1092-1	11	PN16
Welding neck flange	DIN 2634	EN 1092-1	11	PN25
Welding neck flange	DIN 2635	EN 1092-1	11	PN40
Welding neck flange	DIN 2636	EN 1092-1	11	PN63
Welding neck flange	DIN 2637	EN 1092-1	11	PN100

DIN 2633 PN16 Welding Neck Flange Material Options:

DIN 2633 PN16 Welding Neck Flanges are available in a variety of materials depending on the application:

Carbon Steel: S235JR, C22.8, P245GH, P250GH,P265GH
Stainless Steel: AISI 304 / 304L /1.4307, AISI 316 / 316L/1.4404 , 321, 347
Alloy Steel: 16Mo3, 13CrMo4-5
Duplex / Super Duplex: 1.4462, 1.4410
Other Grades: Available upon request for corrosive or high-temperature service

Dimensions and weight of DIN 2633 PN16 Weld Neck Flanges

Nominal Diameter	Pipe O.D d1		Flange Dimensions				Hub Dimensions				Raised Face		Bolting Dimensions			WT.
DN	ISO	DIN	D	b	K	h1	d3	s	r	h2	d4	f	n	bolt	d2	Kgs
10	–	14.0	90	14	60	35	25	1.8	4	6	40	2	4	M12	14	0.59
10	17.2	–	90	14	60	35	28	1.8	4	6	40	2	4	M12	14	0.59
15	–	20.0	95	14	65	35	30	2	4	6	45	2	4	M12	14	0.65
15	21.3	–	95	14	65	35	32	2	4	6	45	2	4	M12	14	0.65
20	–	25.0	105	16	75	38	38	2.3	4	6	58	2	4	M12	14	0.95
20	26.9	–	105	16	75	38	40	2.3	4	6	58	2	4	M12	14	0.95
25	–	30.0	115	16	85	38	42	2.6	4	6	68	2	4	M12	14	1.14
25	33.7	–	115	16	85	38	45	2.6	4	6	68	2	4	M12	14	1.14
32	–	38.0	140	16	100	40	52	2.6	6	6	78	2	4	M16	18	1.69
32	42.4	–	140	16	100	40	56	2.6	6	6	78	2	4	M16	18	1.69
40	–	44.5	150	16	110	42	60	2.6	6	7	88	3	4	M16	18	1.86
40	48.3	–	150	16	110	42	64	2.6	6	7	88	3	4	M16	18	1.86
50	–	57.0	165	18	125	45	72	2.9	6	8	102	3	4	M16	18	2.53
50	60.3	–	165	18	125	45	75	2.9	6	8	102	3	4	M16	18	2.53
65	76.1	76.1	185	18	145	45	90	2.9	6	10	122	3	4	M16	18	3.08
80	88.9	88.9	200	20	160	50	105	3.2	8	10	138	3	8	M16	18	3.72
100	–	108.0	220	20	180	52	125	3.6	8	12	158	3	8	M16	18	4.71
100	114.3	–	220	20	180	52	131	3.6	8	12	158	3	8	M16	18	4.71
125	–	133.0	250	22	210	55	150	4	8	12	188	3	8	M16	18	6.4
125	139.5	–	250	22	210	55	156	4	8	12	188	3	8	M16	18	6.4
150	–	159.0	285	22	240	55	175	4.5	10	12	212	3	8	M20	22	7.8
150	168.3	–	285	22	240	55	184	4.5	10	12	212	3	8	M20	22	7.8
200	219.1	219.1	340	24	295	62	235	5.9	10	16	268	3	12	M20	22	11
250	–	267.0	405	26	355	70	285	6.3	12	16	320	3	12	M24	26	15.6
250	273.0	–	405	26	355	70	292	6.3	12	16	320	3	12	M24	26	15.6
300	323.9	323.9	460	28	410	78	344	7.1	12	16	378	4	12	M24	26	22.1
350	355.6	–	520	30	470	82	390	8	12	16	438	4	16	M24	26	31.3
350	–	368.0	520	30	470	82	390	8	12	16	438	4	16	M24	26	29.2
400	406.4	–	580	32	525	85	445	8	12	16	490	4	16	M27	30	39.5
400	–	419.0	580	32	525	85	445	8	12	16	490	4	16	M27	30	37.1
450	457.0	457.0	640	34	585	85	490	8	12	16	550	4	20	M27	30	44.3
500	508	508	715	34	650	90	548	8	12	16	610	4	20	M30	33	61.2
600	610	610	840	36	770	95	652	8.8	12	18	725	5	20	M33	36	75.4
700	711	711	910	36	840	100	755	8.8	12	18	795	5	24	M33	36	77.1
800	813	813	1025	38	950	105	855	10	12	20	900	5	24	M36	39	101
900	914	914	1125	40	1050	110	955	10	12	20	1000	5	28	M36	39	122
1000	1016	1016	1255	42	1170	120	1058	10	16	22	1115	5	28	M39	42	162
1200	1220	1220	1485	48	1390	130	1262	13	16	30	1330	5	32	M45	48	243
1400	1420	1420	1685	52	1590	145	1465	14	16	30	1530	5	36	M45	48	323
1600	1620	1620	1930	58	1820	160	1668	16	16	35	1750	5	40	M52	56	479
1800	1820	1820	2130	62	2020	170	1870	18	16	35	1950	5	44	M52	56	599
2000	2020	2020	2345	66	2230	180	2072	20	16	40	2150	5	48	M56	62	719

*All dimensions are in mm unless otherwise specified.

Compliance & Certification of DIN 2633 WN flanges

DIN EN 1092-1 Standard Compliance
PED 2014/68/EU (if required)
EN 10204 3.1 or 3.2 Material Test Certificates
Third-party inspection available (e.g., TÜV, BV, SGS)

We regularly keep stock of DIN 2633 WN flanges for following size..

Welding neck flange DN20 PN16 DIN 2633 (26,9)
Welding neck flange DN25 PN16 DIN 2633 (33,7)
Welding neck flange DN32 PN16 DIN 2633 (42,4)
Welding neck flange DN40 PN16 DIN 2633 (48,3)
Welding neck flange DN50 PN16 DIN 2633 (60,3)
Welding neck flange DN65 PN16 DIN 2633 (76,1)
Welding neck flange DN80 PN16 DIN 2633 (88,9)
Welding neck flange DN100 PN16 DIN 2633 (114,3)
Welding neck flange DN125 PN16 DIN 2633 (139,7)
Welding neck flange DN150 PN16 DIN 2633 (168,3)
Welding neck flange DN200 PN16 DIN 2633 (219,1)
Welding neck flange DN250 PN16 DIN 2633 (273)

Download DIN 2633 PN16 Weld Neck Flange Dimension and standard