EN 1092-1 Type 35 Weld Ring Neck

Drawing, Construction, Function & Manufacture

Figure-1: Drawing of the assembly of EN 1092-1 Type 35 and Type 02. (1) Type 02 loose plate flange; (2) Type 35 weld ring neck; Φd₁: joint facing diameter; ΦA: outside diameter of neck; F: collar thickness; H₄: length through hub; S: wall thickness.

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The EN 1092-1 Type 35 weld ring neck is a collar, that is always used with a Type 02 loose plate flange. As illustrated in Figure-1, it consists of the straight pipe length (“neck”) and a flared pipe end (“ring”). The thickness of the flared section is thicker than that of a Type 36 counterpart. It can be viewed as a lap joint stub end with reinforced shoulder thickness. In such a flange assembly, its “neck” end is joined to the pipe by welding, while the loose plate flange mounts to the back surface of the “ring” shoulder, pressing it against the gasket to form a tight seal. EN 1092-1 Type 35 weld neck rings are available in p/T ratings of PN 2.5, PN 6, PN10, PN 16, PN 25 and PN 40. Generally, the Type 35 weld ring neck collar shall be manufactured by a forging process or by welding a ring plate to a seamless pipe. It may be made out of austenitic stainless steels (such as 1.4307/ 304L, 1.4404/ 316L, 1.4571/ 316Ti, etc.) and duplex stainless steels (such as 1.4462/ S32205, 1.4410/ S32750, etc.).

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.

Weld Ends Preparation & Surface Finishes

Figure-2: The two types of welding ends for Type 35 weld ring neck: Chamfer A and Chamfer B.

EN 1092-1 Type 35 weld ring neck may be furnished with two types of welding ends, either Chamfer A or Chamfer B, as illustrated in Figure-2. The values of wall thickness (S, Sp) and outside diameter of neck are presented in the two tables below. For sizes highlighted in light green, Chamfer A shall be furnished; For others, Chamfer B shall be furnished.

ΦA	S for PN 2.5 mm	S_p for PN 2.5 mm	S for PN 6 mm	S_p for PN 6 mm	S for PN 10 mm	S_p for PN 10 mm
17.2	3	2	3	2	3	2
21.3	3	2	3	2	3	2
26.9	3	2	3	2	3	2
33.7	3	2	3	2	3	2
42.4	3	2	3	2	3	2
48.3	3	2	3	2	3	2
60.3	3	2	3	2	3	2
76.1	4	2	4	2	4	2
88.9	4	2	4	2	4	2
114.3	4	2	4	2	4	2
139.7	5	2	5	2	5	2
168.3	6	2	6	2	6	2
219.1	6	2.6	6	2.6	6	2.6

*Dimensions for welding ends of Type 35, PN 2.5, PN 6 and PN 10.

ΦA	S for PN 16 mm	S_p for PN 16 mm	S for PN 25 mm	S_p for PN 25 mm	S for PN 40 mm	S_p for PN 40 mm
17.2	3	2	3	2	3	2
21.3	3	2	3	2	3	2
26.9	3	2	3	2	3	2
33.7	3	2	3	2	3	2
42.4	3	2	3	2	3	2
48.3	3	2	3	2	3	2
60.3	3	2	4	2.6	4	2.6
76.1	4	2	5	2.6	5	2.6
88.9	4	2	6	2.6	6	2.6
114.3	4	2	6	3.2	6	3.2
139.7	5	2	6	3.2	6	3.2
168.3	6	2	8	3.2	8	4

*Dimensions for welding ends of Type 35, PN 16, PN 25 and PN 40.

Surface finishes for Type 35: (1) surface finishes for outside diameter: Ra ≤ 25μm, Rz ≤ 160μm; (2) surface finishes for center bore diameter: Ra ≤ 25μm, Rz ≤ 160μm; (3) surface finishes for jointing faces: 3.2μm ≤ Ra ≤ 12.5μm, 12.5μm ≤ Ra ≤ 50μm. The jointing faces shall be machined by a turning process.

Dimensions, Masses & Tolerances

DN	F	H₄	d₁	Mass
10	5	28	35	0.08
15	5	30	40	0.09
20	6	32	50	0.17
25	7	35	60	0.26
32	8	35	70	0.36
40	8	38	80	0.45
50	8	38	90	0.53
65	8	38	110	0.70
80	10	42	128	1.0
100	10	45	148	1.3
125	10	48	178	1.9
150	10	48	202	2.4
200	11	55	258	3.9

*Dimensions & Masses for Type 35 of EN 1092-1 PN 2.5.

DN	F	H₄	d₁	Mass
10	5	28	35	0.08
15	5	30	40	0.09
20	6	32	50	0.17
25	7	35	60	0.26
32	8	35	70	0.36
40	8	38	80	0.45
50	8	38	90	0.53
65	8	38	110	0.70
80	10	42	128	1.0
100	10	45	148	1.3
125	10	48	178	1.9
150	10	48	202	2.4
200	11	55	258	3.9

*Dimensions & Masses for Type 35 of EN 1092-1 PN 6.

DN	F	H₄	d₁	Mass
10	5	35	40	0.08
15	5	38	45	0.09
20	6	40	58	0.17
25	7	40	68	0.26
32	8	42	78	0.36
40	8	45	88	0.45
50	8	45	102	0.53
65	8	45	122	0.70
80	10	50	138	1.0
100	10	52	158	1.3
125	10	55	188	1.9
150	10	55	212	2.4
200	11	62	268	3.9

*Dimensions & Masses for Type 35 of EN 1092-1 PN 10.

DN	F	H₄	d₁	Mass
10	5	35	40	0.08
15	5	38	45	0.09
20	6	40	58	0.17
25	7	40	68	0.26
32	8	42	78	0.36
40	8	45	88	0.45
50	8	45	102	0.53
65	8	45	122	0.70
80	10	50	138	1.0
100	10	52	158	1.3
125	10	55	188	1.9
150	10	55	212	2.4

*Dimensions & Masses for Type 35 of EN 1092-1 PN 16.

DN	F	H₄	d₁	Mass
10	5	35	40	0.08
15	5	38	45	0.09
20	6	40	58	0.17
25	7	40	68	0.26
32	8	42	78	0.36
40	8	45	88	0.45
50	10	48	102	0.69
65	11	52	122	1.1
80	12	58	138	1.6
100	14	65	162	2.4
125	16	68	188	3.2

*Dimensions & Masses for Type 35 of EN 1092-1 PN 25.

DN	F	H₄	d₁	Mass
10	5	35	40	0.08
15	5	38	45	0.09
20	6	40	58	0.17
25	7	40	68	0.26
32	8	42	78	0.36
40	8	45	88	0.45
50	10	48	102	0.69
65	11	52	122	1.1
80	12	58	138	1.6

*Dimensions & Masses for Type 35 of EN 1092-1 PN 40.

Tolerances: (1) ΦA: for size ≤ DN150, ±0.75% & min. ±0.3mm; for size > DN150, ±1% & max. ±3.0mm. (2) S: for S ≤ 8mm, (+15%, -10%); for S > 8mm, (+15%, -5%). (3) S_p: for S ≤ 6mm, (+1.0mm, 0mm); for S > 6mm, (+2.0mm, 0mm). (4) H₄: for size ≤DN80, ±1.5mm; for DN80 < size ≤ DN250, ±2.0; for size > DN 250, ±3.0mm. (5)F: for F ≤ 18mm, ±1.0mm; for F > 18mm, ±1.5mm. (6) d₁: for size ≤ DN250, (+2.0mm, -1.0mm); for size > DN250, (+3.0mm, -1.0mm).