Welding neck flange (WN flange)

Features:

Certificate: ISO

American Standard: ASME B16.5

EN / BS Standard: EN 1092-1 Type 11

Material -1: Carbon steel ASTM A105

Material -2: Stainless steel SS ASTM A182, SS 304 , SS 316

Flange Face: FF / RF

W.pressure: Class 150, Class 300 / PN10, PN6, PN25

Surface: Original / Black painting / hot dip galvanized

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Product details

Welding neck flange has a long and tapered neck and the neck is welded directly to the pipe. This design allows for smooth material flow and reduces stress concentrations at welded joints.

American Welding Neck Flange ( WN Flange) Class 150

SIZE			Rating class	Flange OD O (mm)	Bolt circle dia. W (mm)	Bolting (No. x hole)	Ref. weight (kg)
NPS	DN	OD (mm)	Rating class	Flange OD O (mm)	Bolt circle dia. W (mm)	Bolting (No. x hole)	Ref. weight (kg)
1/2”	DN 15	21.3	Class 150	90	60.3	4 x 5/8″	0.5
3/4”	DN 20	26.7	Class 150	100	69.9	4 x 5/8″	0.74
1”	DN 25	33.4	Class 150	110	79.4	4 x 5/8″	1.06
1-1/4”	DN 32	42.2	Class 150	115	88.9	4 x 5/8″	1.31
1-1/2”	DN 40	48.3	Class 150	125	98.4	4 x 5/8″	1.69
2”	DN 50	60.3	Class 150	150	120.7	4 x 3/4″	2.55
2-1/2”	DN 65	73.0	Class 150	180	139.7	4 x 3/4″	4.26
3”	DN 80	88.9	Class 150	190	152.4	4 x 3/4″	4.98
4”	DN 100	114.3	Class 150	230	190.5	8 x 3/4″	7.13
5”	DN 125	139.7	Class 150	255	215.9	8 x 7/8″	8.93
6”	DN 150	168.3	Class 150	280	241.3	8 x 7/8″	10.8

Note: For more available size and rating class, please download our catalog.

EN / BS Welding Neck Flange (WN Flange) PN16

SIZE			Rating class	Flange OD D (mm)	Bolt circle dia. K (mm)	Bolting (No. x hole)	Ref. weight (kg)
NPS	DN	OD (mm)	Rating class	Flange OD D (mm)	Bolt circle dia. K (mm)	Bolting (No. x hole)	Ref. weight (kg)
1/2”	DN 15	21.3	PN16	95	65	4 x 14	0.77
3/4”	DN 20	26.9	PN16	105	75	4 x 14	1.09
1”	DN 25	33.7	PN16	115	85	4 x 14	1.3
1-1/4”	DN 32	42.4	PN16	140	100	4 x 18	1.91
1-1/2”	DN 40	48.3	PN16	150	110	4 x 18	2.15
2”	DN 50	60.3	PN16	165	125	4 x 18	2.53
2-1/2”	DN 65	73.0 / 76.1	PN16	185	145	4 x 18	3.03
3”	DN 80	88.9	PN16	200	160	8 x 18	3.92
4”	DN 100	114.3	PN16	220	180	8 x 18	4.62
5”	DN 125	139.7	PN16	250	210	8 x 18	6.3
6”	DN 150	165.1 / 168.3	PN16	285	240	8 x 22	7.81