EN 1092-1 Type 34 Weld Neck Collar

Construction, Drawing & Function

The EN 1092-1 Type 34 weld neck collar resembles a weld neck flange. It consists of a tapered hub with a short straight length plus a flared end. The taper of the hub generally has an angle not exceeding 7° on the outside surface for forging purpose. The tapered section of the hub provides an enhancement to the collar strength. Its outside diameter (ΦN₁) at the neck root is larger than common straight collars. The straight-length section of the hub is furnished to facilitate the attachment to the piping by a butt welding process. The collar thickness, F, is the same as that of Type 32 plate collar. Usually, Type 34 weld neck collars shall be manufactured by a forging process. They are available in sizes DN10~DN600 for PN 10, DN10~DN600 for PN 16, DN10~DN500 for PN 25, and DN10~DN600 for PN 40, respectively.

EN 1092-1 Type 34 weld-neck collar shall always work together with a Type 04 loose plate flange. The Type 04 flange has enlarged bore diameter to accommodate the relatively larger neck diameter (ΦN₁) of the Type 34 collar. As illustrated in Figure-2, the Type 34 collar is attached to the piping by butt welding. The Type 04 loose plate flange slips over the hub of the wed-neck collar and is seated onto the shoulder of the flared end. Bolting is tightened to compress the gasket against the facings of two Type 34 collars to achieve fluid-tight sealing.

EN 1092-1 Loose Plate Flanges & Collars
Type 02	Type 04	Type 32	Type 33
Type 34	Type 35	Type 36	Type 37

*Click to view specifications for all EN 1092-1 loose plate flanges & collars.

Dimensions, Masses & Tolerances

DN	d1 mm	N1 mm	A mm	S mm
10	40	28	17.2	1.8
15	45	32	21.3	2.0
20	58	40	26.9	2.3
25	68	46	33.7	2.6
32	78	56	42.4	2.6
40	88	64	48.3	2.6
50	102	74	60.3	2.9
65	122	92	76.1	2.9
80	138	105	88.9	3.2
100	158	131	114.3	3.6
125	188	156	139.7	4.0
150	212	184	168.3	4.5
200	268	234	219.1	6.3
250	320	292	273.0	6.3
300	370	342	323.9	7.1
350	430	385	355.6	7.1
400	482	440	406.4	7.1
450	532	488	457.0	7.1
500	585	542	508.0	7.1
600	685	642	610.0	8.0

*Dimensions of d₁, N₁, A, S for EN 1092-1 type 34 PN 10.

DN	H2 mm	H3 mm	F mm	W kg
10	35	6	12	0.148
15	38	6	12	0.189
20	40	6	14	0.340
25	40	6	14	0.444
32	42	6	14	0.572
40	45	7	14	0.734
50	45	8	16	0.974
65	45	10	16	1.29
80	50	10	16	1.67
100	52	12	18	2.12
125	55	12	18	2.88
150	55	12	20	3.46
200	62	16	20	5.49
250	68	16	22	7.53
300	68	16	22	9.11
350	68	16	22	14.1
400	72	16	24	17.8
450	72	16	24	19.6
500	75	16	26	23.7
600	82	18	26	28.9

*Dimensions of H₂, H₃, F & Masses for EN 1092-1 type 34 PN 10.

DN	d1 mm	N1 mm	A mm	S mm
10	40	28	17.2	1.8
15	45	32	21.3	2.0
20	58	40	26.9	2.3
25	68	46	33.7	2.6
32	78	56	42.4	2.6
40	88	64	48.3	2.6
50	102	74	60.3	2.9
65	122	92	76.1	2.9
80	138	105	88.9	3.2
100	158	131	114.3	3.6
125	188	156	139.7	4.0
150	212	184	168.3	4.5
200	268	235	219.1	6.3
250	320	292	273.0	6.3
300	378	344	323.9	7.1
350	438	390	355.6	8.0
400	490	445	406.4	8.0
450	550	490	457.0	8.0
500	610	548	508.0	8.0
600	725	670	610.0	8.8

*Dimensions of d₁, N₁, A, S for EN 1092-1 type 34 PN 16.

DN	H2 mm	H3 mm	F mm	W kg
10	35	6	12	0.148
15	38	6	12	0.189
20	40	6	14	0.340
25	40	6	14	0.444
32	42	6	14	0.572
40	45	7	14	0.734
50	45	8	16	0.974
65	45	10	16	1.29
80	50	10	16	1.67
100	52	12	18	2.12
125	55	12	18	2.88
150	55	12	20	3.46
200	62	16	20	5.55
250	70	16	22	7.71
300	78	16	24	11.4
350	82	16	26	19.2
400	85	16	28	23.7
450	83	18	30	28.2
500	84	18	32	35.5
600	88	18	32	47.9

*Dimensions of H₂, H₃, F & Masses for EN 1092-1 type 34 PN 16.

DN	d1 mm	N1 mm	A mm	S mm
10	40	28	17.2	1.8
15	45	32	21.3	2.0
20	58	40	26.9	2.3
25	68	46	33.7	2.6
32	78	56	42.4	2.6
40	88	64	48.3	2.6
50	102	75	60.3	2.9
65	122	90	76.1	2.9
80	138	105	88.9	3.2
100	162	134	114.3	3.6
125	188	162	139.7	4.0
150	218	192	168.3	4.5
200	278	244	219.1	6.3
250	335	298	273.0	7.1
300	395	352	323.9	8.0
350	450	398	355.6	8.0
400	505	452	406.4	8.8
450	555	500	457.0	8.8
500	615	558	508.0	10.0

*Dimensions of d₁, N₁, A, S for EN 1092-1 type 34 PN 25.

DN	H2 mm	H3 mm	F mm	W kg
10	35	6	12	0.148
15	38	6	12	0.189
20	40	6	14	0.340
25	40	6	14	0.444
32	42	6	14	0.572
40	45	7	14	0.734
50	48	8	16	1.02
65	52	10	16	1.36
80	58	12	18	1.90
100	65	12	20	2.77
125	68	12	22	3.78
150	75	12	24	5.25
200	80	16	26	9.07
250	88	18	26	12.7
300	92	18	28	18.0
350	100	20	32	27.8
400	110	20	34	36.3
450	110	20	36	40.9
500	125	20	38	55.7

*Dimensions of H₂, H₃, F & Masses for EN 1092-1 type 34 PN 25.

DN	d1 mm	N1 mm	A mm	S mm
10	40	28	17.2	1.8
15	45	32	21.3	2.0
20	58	40	26.9	2.3
25	68	46	33.7	2.6
32	78	56	42.4	2.6
40	88	64	48.3	2.6
50	102	75	60.3	2.9
65	122	90	76.1	2.9
80	138	105	88.9	3.2
100	162	134	114.3	3.6
125	188	162	139.7	4.0
150	218	192	168.3	4.5
200	285	244	219.1	6.3
250	345	306	273.0	7.1
300	410	362	323.9	8.0
350	465	408	355.6	8.8
400	535	462	406.4	11.0
450	560	500	457.0	12.5
500	615	562	508.0	14.2
600	735	666	610.0	16.0

*Dimensions of d₁, N₁, A, S for EN 1092-1 type 34 PN 40.

DN	H2 mm	H3 mm	F mm	W kg
10	35	6	12	0.148
15	38	6	12	0.189
20	40	6	14	0.340
25	40	6	14	0.444
32	42	6	14	0.572
40	45	7	14	0.734
50	48	8	16	1.02
65	52	10	16	1.36
80	58	12	18	1.90
100	65	12	20	2.77
125	68	12	22	3.78
150	75	12	24	5.25
200	88	16	28	10.2
250	105	18	30	16.4
300	115	18	34	25.4
350	125	20	36	37.8
400	135	20	42	56.4
450	135	20	46	56.4
500	140	20	50	72.9
600	150	20	54	106

*Dimensions of H₂, H₃, F & Masses for EN 1092-1 type 34 PN 40.