Carbon steel weld neck flange,P235GH,P265GH,P355NL1

Description

Product Name	Steel Flange
Types	Plate, Welding Neck, Slip on, Blind, Lap joint, Threaded Flange
Face Finish	RF,FF,RTJ,TF,GF
Standard	ANSI	ANSI B16.5 ASME B16.47 series A/B
	DIN	DIN 2631 2573 2527 2565 2641
	GOST	GOST 12820-80,GOST 12821-80,Gost Blind
	EN	EN1092-1:2002
	JIS	JIS B2220-2004, KS D3576, KS B6216,KS B1511-2007,JIS B2261; JIS B8210
	BS	BS4504,BS10 Table D/E
	UNI	UNI 2253-67,UNI6091-67,UNI2276-67,UNI2280-67,UNI6089-67
	SABS	SABS 1123
Material	ANSI	CS A105/SA 105N,SS 304/304L,316/316L Alloy Steel: WHPY45/52/65/80
	DIN	CS RST37.2;S235JR SS 304/304L,316/316L
	GOST	CS CT20;16MN;SS 304/304L,316/316L
	EN	CS RST37.2;S235JR;C22.8SS 304/304L,316/316L
	JIS	CS SS400,SF440,SS 304/304L, 316/316L
	BS	CSRST37.2;S235JR;C22.8;Q235SS 304/304L,316/316L
	UNI	CSRST37.2;S235JR;C22.8;Q235SS 304/304L,316/316L
	SABS	CSRST37.2;S235JR;Q235;SS 304/304L,316/316L
Pressure	ANSI	Class 150, 300, 600, 900, 1500 2500lbs
	DIN	PN6,PN10,PN16,PN25,PN40,PN64,PN100
	GOST	PN6,PN10,PN16,PN25
	EN	PN6,PN10,PN16,PN25,PN40,PN64,PN100
	JIS	1K,2K,5K,10K,16K,20K,30K,40K
	BS	PN6,PN10,PN16,PN25,PN40,PN64,PN100
	UNI	PN6,PN10,PN16,PN25,PN40
	SABS	600KPA,1000,1600,2500,4000
Size	ANSI	1/2” – 60”
	DIN	DN15-DN2000
	GOST	DN10-DN1600
	EN	DN15-DN2000
	JIS	15A-1500A
	BS	DN15-DN2000
	UNI	DN10-DN2000
	SABS	DN10-DN600
Coating	varnish, yellow paint, anti-rust oil, galvanizing etc
Usage	Used for the connection of all kinds of pipeline. to convey the water, steam, air, gas and oil
Package	Wooden cases/pallets
Delivery	Within 30 days
Certificate	ISO9001:2008

WELDING NECK FLANGE DIMENSIONS IN INCHES

WN CLASS 150 (IN INCH)

Weld neck flange dimensions class 150 (ASME B16.5) in inches

Flange NPS	Inside Diameter	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	H	H1	Raised Face Thickness (T)	T1	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	0.62″	3.50″	2.38″	1.38″	.063″	1.19″	0.84″	1.88″	.38″	1.82″	.62″	4
3/4″	0.82″	3.88″	2.75″	1.69″	.063″	1.50″	1.05″	2.06″	.44″	2.00″	.62″	4
1″	1.05″	4.25″	3.12″	2.00″	.063″	1.94″	1.32″	2.19″	.50″	2.13″	.62″	4
1-1/4″	1.38″	4.62″	3.50″	2.50″	.063″	2.31″	1.66″	2.25″	.56″	2.19″	.62″	4
1-1/2″	1.61″	5.00″	3.88″	2.88″	.063″	2.56″	1.90″	2.44″	.62″	2.38″	.62″	4
2″	2.07″	6.00″	4.75″	3.62″	.063″	3.06″	2.38″	2.50″	.69″	2.44″	.75″	4
2-1/2″	2.47″	7.00″	5.50″	4.12″	.063″	3.56″	2.88″	2.75″	.82″	2.69″	.75″	4
3″	3.07″	7.50″	6.00″	5.00″	.063″	4.25″	3.50″	2.75″	.88″	2.69″	.75″	4
3-1/2″	3.55″	8.50″	7.00″	5.50″	.063″	4.81″	4.00″	2.81″	.88″	2.75″	.75″	8
4″	4.03″	9.00″	7.50″	6.19″	.063″	5.31″	4.50″	3.00″	.88″	2.94″	.75″	8
5″	5.05″	10.00″	8.50″	7.31″	.063″	6.44″	5.56″	3.50″	.88″	3.44″	.88″	8
6″	6.07″	11.00″	9.50″	8.50″	.063″	7.56″	6.63″	3.50″	.94″	3.44″	.88″	8
8″	7.98″	13.50″	11.75″	10.62″	.063″	9.69″	8.63″	4.00″	1.06″	3.94″	.88″	8
10″	10.02″	16.00″	14.25″	12.75″	.063″	12.00″	10.75″	4.00″	1.13″	3.94″	1.00″	12
12″	12.00″	19.00″	17.00″	15.00″	.063″	14.38″	12.75″	4.50″	1.19″	4.44″	1.00″	12
14″	13.25″	21.00″	18.75″	16.25″	.063″	15.75″	14.00″	5.00″	1.32″	4.94″	1.12″	12
16″	15.25″	23.50″	21.25″	18.50″	.063″	18.00″	16.00″	5.00″	1.38″	4.94″	1.12″	16
18″	17.25″	25.00″	22.75″	21.00″	.063″	19.88″	18.00″	5.50″	1.50″	5.44″	1.25″	16
20″	19.25″	27.50″	25.00″	23.00″	.063″	22.00″	20.00″	5.69″	1.63″	5.63″	1.25″	20
22″	21.25″	29.50″	27.25″	25.25″	.063″	24.25″	22.00″	5.88″	1.75″	5.82″	1.38″	20
24″	23.25″	32.00″	29.50″	27.25″	.063″	26.12″	24.00″	6.00″	1.82″	5.94″	1.38″	20

WN CLASS 300 (IN INCH)

Weld neck flange dimensions class 300 (ASME B16.5) in inches

Flange NPS	Inside Diameter	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	H	H1	Raised Face Thickness (T)	T1	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	0.62″	3.75″	2.62″	1.38″	.063″	1.50″	0.84″	2.06″	.50″	2.00″	0.62″	4
3/4″	0.82″	4.62″	3.25″	1.69″	.063″	1.88″	1.05″	2.25″	.56″	2.19″	0.75″	4
1″	1.05″	4.88″	3.50″	2.00″	.063″	2.12″	1.32″	2.44″	.63″	2.38″	0.75″	4
1-1/4″	1.38″	5.25″	3.88″	2.50″	.063″	2.50″	1.66″	2.56″	.69″	2.50″	0.75″	4
1-1/2″	1.61″	6.12″	4.50″	2.88″	.063″	2.75″	1.90″	2.69″	.75″	2.63″	0.88″	4
2″	2.07″	6.50″	5.00″	3.62″	.063″	3.31″	2.38″	2.75″	.82″	2.69″	0.75″	8
2-1/2″	2.47″	7.50″	5.88″	4.12″	.063″	3.94″	2.88″	3.00″	.94″	2.94″	0.88″	8
3″	3.07″	8.25″	6.62″	5.00″	.063″	4.62″	3.50″	3.12″	1.06″	3.06″	0.88″	8
3-1/2″	3.55″	9.00″	7.25″	5.50″	.063″	5.25″	4.00″	3.19″	1.13″	3.13″	0.88″	8
4″	4.03″	10.00″	7.88″	6.19″	.063″	5.75″	4.50″	3.38″	1.19″	3.32″	0.88″	8
5″	5.05″	11.00″	9.25″	7.31″	.063″	7.00″	5.56″	3.88″	1.32″	3.82″	0.88″	8
6″	6.07″	12.50″	10.62″	8.50″	.063″	8.12″	6.63″	3.88″	1.38″	3.82″	0.88″	12
8″	7.98″	15.00″	13.00″	10.62″	.063″	10.25″	8.63″	4.38″	1.56″	4.32″	1.00″	12
10″	10.02″	17.50″	15.25″	12.75″	.063″	12.62″	10.75″	4.62″	1.82″	4.56″	1.12″	16
12″	12.00″	20.50″	17.75″	15.00″	.063″	14.75″	12.75″	5.12″	1.94″	5.06″	1.25″	16
14″	13.25″	23.00″	20.25″	16.25″	.063″	16.75″	14.00″	5.62″	2.06″	5.56″	1.25″	20
16″	15.25″	25.50″	22.50″	18.50″	.063″	19.00″	16.00″	5.75″	2.19″	5.69″	1.38″	20
18″	17.25″	28.00″	24.75″	21.00″	.063″	21.00″	18.00″	6.25″	2.32″	6.19″	1.38″	24
20″	19.25″	30.50″	27.00″	23.00″	.063″	23.12″	20.00″	6.38″	2.44″	6.32″	1.38″	24
22″	21.25″	33.00″	29.25″	25.25″	.063″	25.25″	22.00″	6.50″	2.57″	6.44″	1.62″	24
24″	23.25″	36.00″	32.0″	27.25″	.063″	27.62″	24.00″	6.62″	2.69″	6.56″	1.62″	24

WN CLASS 400 (IN INCH)

Weld neck flange dimensions class 400 (ASME B16.5) in inches

Flange NPS	Inside Diameter	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	H	H1	Raised Face Thickness (T)	T1	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	.55″	3.75″	2.62″	1.38″	.250″	1.50″	0.84″	2.31″	0.56″	2.06″	0.62″	4
3/4″	.74″	4.62″	3.25″	1.69″	.250″	1.88″	1.05″	2.50″	0.62″	2.25″	0.75″	4
1″	.96″	4.88″	3.50″	2.00″	.250″	2.12″	1.32″	2.69″	0.69″	2.44″	0.75″	4
1-1/4″	1.28″	5.25″	3.88″	2.50″	.250″	2.50″	1.66″	2.87″	0.81″	2.62″	0.75″	4
1-1/2″	1.50″	6.12″	4.50″	2.88″	.250″	2.75″	1.90″	3.00″	0.88″	2.75″	0.88″	4
2″	1.94″	6.50″	5.00″	3.62″	.250″	3.31″	2.38″	3.13″	1.00″	2.88″	0.75″	8
2-1/2″	2.32″	7.50″	5.88″	4.12″	.250″	3.94″	2.88″	3.37″	1.12″	3.12″	0.88″	8
3″	2.90″	8.25″	6.62″	5.00″	.250″	4.62″	3.50″	3.50″	1.25″	3.25″	0.88″	8
3-1/2″	3.36″	9.00″	7.25″	5.50″	.250″	5.25″	4.00″	3.63″	1.38″	3.38″	1.00″	8
4″	3.83″	10.00″	7.88″	6.19″	.250″	5.75″	4.50″	3.75″	1.38″	3.50″	1.00″	8
5″	4.81″	11.00″	9.25″	7.31″	.250″	7.00″	5.56″	4.25″	1.50″	4.00″	1.00″	8
6″	5.76″	12.50″	10.62″	8.50″	.250″	8.12″	6.63″	4.31″	1.62″	4.06″	1.00″	12
8″	7.63″	15.00″	13.00″	10.62″	.250″	10.25″	8.63″	4.87″	1.88″	4.62″	1.12″	12
10″	9.75″	17.50″	15.25″	12.75″	.250″	12.62″	10.75″	5.13″	2.12″	4.88″	1.25″	16
12″	11.75″	20.50″	17.75″	15.00″	.250″	14.75″	12.75″	5.63″	2.25″	5.38″	1.38″	16
14″	13.00″	23.00″	20.25″	16.25″	.250″	16.75″	14.00″	6.13″	2.38″	5.88″	1.38″	20
16″	15.00″	25.50″	22.50″	18.50″	.250″	19.00″	16.00″	6.25″	2.50″	6.00″	1.50″	20
18″	17.00″	28.00″	24.75″	21.00″	.250″	21.00″	18.00″	6.75″	2.62″	6.50″	1.50″	24
20″	19.00″	30.50″	27.00″	23.00″	.250″	23.12″	20.00″	6.87″	2.75″	6.62″	1.62″	24
22″	21.00″	33.00″	29.25″	25.25″	.250″	25.25″	22.00″	7.00″	2.88″	6.75″	1.75″	24
24″	23.00″	36.00″	32.00″	27.25″	.250″	27.62″	24.00″	7.13″	3.00″	6.88″	1.88″	24

WN CLASS 600 (IN INCH)

Weld neck flange dimensions class 600 (ASME B16.5) in inches

Flange NPS	Inside Diameter	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	H	H1	Raised Face Thickness (T)	T1	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	0.55″	3.75″	2.62″	1.38″	.250″	1.50″	0.84″	2.31″	0.56″	2.06″	0.62″	4
3/4″	0.74″	4.62″	3.25″	1.69″	.250″	1.88″	1.05″	2.50″	0.62″	2.25″	0.75″	4
1″	0.96″	4.88″	3.50″	2.00″	.250″	2.12″	1.32″	2.69″	0.69″	2.44″	0.75″	4
1-1/4″	1.28″	5.25″	3.88″	2.50″	.250″	2.50″	1.66″	2.87″	0.81″	2.62″	0.75″	4
1-1/2″	1.50″	6.12″	4.50″	2.88″	.250″	2.75″	1.90″	3.00″	0.88″	2.75″	0.88″	4
2″	1.94″	6.50″	5.00″	3.62″	.250″	3.31″	2.38″	3.13″	1.00″	2.88″	0.75″	8
2-1/2″	2.32″	7.50″	5.88″	4.12″	.250″	3.94″	2.88″	3.37″	1.12″	3.12″	0.88″	8
3″	2.90″	8.25″	6.62″	5.00″	.250″	4.62″	3.50″	3.50″	1.25″	3.25″	0.88″	8
3-1/2″	3.36″	9.00″	7.25″	5.50″	.250″	5.25″	4.00″	3.63″	1.38″	3.38″	1.00″	8
4″	3.83″	10.75″	8.50″	6.19″	.250″	6.00″	4.50″	4.25″	1.5″	4.00″	1.00″	8
5″	4.81″	13.00″	10.50″	7.31″	.250″	7.44″	5.56″	4.75″	1.75″	4.50″	1.12″	8
6″	5.76″	14.00″	11.50″	8.50″	.250″	8.75″	6.63″	4.87″	1.88″	4.62″	1.12″	12
8″	7.63″	16.50″	13.75″	10.62″	.250″	10.75″	8.63″	5.50″	2.19″	5.25″	1.25″	12
10″	9.75″	20.00″	17.00″	12.75″	.250″	13.5″	10.75″	6.25″	2.50″	6.00″	1.38″	16
12″	11.75″	22.00″	19.25″	15.00″	.250″	15.75″	12.75″	6.37″	2.62″	6.12″	1.38″	20
14″	13.00″	23.75″	20.75″	16.25″	.250″	17.00″	14.00″	6.75″	2.75″	6.50″	1.50″	20
16″	15.00″	27.00″	23.75″	18.50″	.250″	19.50″	16.00″	7.25″	3.00″	7.00″	1.62″	20
18″	17.00″	29.25″	25.75″	21.00″	.250″	21.50″	18.00″	7.50″	3.25″	7.25″	1.75″	20
20″	19.00″	32.00″	28.50″	23.00″	.250″	24.00″	20.00″	7.75″	3.50″	7.50″	1.75″	24
22″	21.00″	34.25″	30.63″	25.25″	.250″	26.25″	22.00″	8.00″	3.75″	7.75″	1.75″	24
24″	23.00″	37.00″	33.00″	27.25″	.250″	28.25″	24.00″	8.25″	4.00″	8.00″	2.00″	24

WN CLASS 900 (IN INCH)

Weld neck flange dimensions class 900 (ASME B16.5) in inches

Flange NPS	Inside Diameter	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	H	H1	Raised Face Thickness (T)	T1	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
3″	2.90″	9.50″	7.50″	5.00″	.250″	5.00″	3.50″	4.25″	1.50″	4.00″	1.00″	8
4″	3.83″	11.50″	9.25″	6.19″	.250″	6.25″	4.50″	4.75″	1.75″	4.50″	1.25″	8
5″	4.81″	13.75″	11.00″	7.31″	.250″	7.50″	5.56″	5.25″	3.00″	5.00″	1.38″	8
6″	5.76″	15.00″	12.50″	8.50″	.250″	9.25″	6.63″	5.75″	2.19″	5.50″	1.25″	12
8″	7.63″	18.50″	15.50″	10.63″	.250″	11.75″	8.63″	6.63″	2.50″	6.38″	1.50″	12
10″	9.75″	21.50″	18.50″	12.75″	.250″	14.50″	10.75″	7.50″	2.75″	7.25″	1.50″	16
12″	11.75″	24.00″	21.00″	15.00″	.250″	16.50″	12.75″	8.13″	3.13″	7.88″	1.50″	20
14″	13.00″	25.25″	22.00″	16.25″	.250″	17.75″	14.00″	8.63″	3.38″	8.38″	1.63″	20
16″	15.00″	27.75″	24.25″	18.50″	.250″	20.00″	16.00″	8.75″	3.50″	8.50″	1.75″	20
18″	17.00″	31.00″	27.00″	21.00″	.250″	22.25″	18.00″	9.25″	4.00″	9.00″	2.00″	20
20″	19.00″	33.75″	29.50″	23.00″	.250″	24.50″	20.00″	10.00″	4.25″	9.75″	2.13″	20
24″	23.00″	41.00″	35.50″	27.25″	.250″	29.50″	24.00″	11.75″	5.50″	11.50″	2.63″	20

WN CLASS 1500 (IN INCH)

Weld neck flange dimensions class 1500 (ASME B16.5) in inches

Flange NPS	Inside Diameter	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	H	H1	Raised Face Thickness (T)	T1	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	0.55″	4.75″	3.25″	1.38″	.250″	1.50″	0.84″	2.63″	0.88″	2.38″	0.88″	4
3/4″	0.74″	5.13″	3.50″	1.69″	.250″	1.75″	1.05″	3.00″	1.00″	2.75″	0.88″	4
1″	0.96″	5.88″	4.00″	2.00″	.250″	2.06″	1.32″	3.13″	1.13″	2.88″	1.00″	4
1-1/4″	1.28″	6.25″	4.38″	2.50″	.250″	2.50″	1.66″	3.13″	1.13″	2.88″	1.00″	4
1-1/2″	1.50″	7.00″	4.88″	2.88″	.250″	2.75″	1.90″	3.50″	1.25″	3.25″	1.13″	4
2″	1.94″	8.50″	6.50″	3.63″	.250″	4.13″	2.38″	4.25″	1.50″	4.00″	1.00″	8
2-1/2″	2.32″	9.63″	7.50″	4.13″	.250″	4.88″	2.88″	4.38″	1.63″	4.13″	1.13″	8
3″	2.90″	10.50″	8.00″	5.00″	.250″	5.25″	3.50″	4.88″	1.88″	4.63″	1.25″	8
4″	3.83″	12.25″	9.50″	6.19″	.250″	6.38″	4.50″	5.13″	2.13″	4.88″	1.38″	8
5″	4.81″	14.75″	11.50″	7.31″	.250″	7.75″	5.56″	6.38″	2.88″	6.13″	1.63″	8
6″	5.76″	15.50″	12.50″	8.50″	.250″	9.00″	6.63″	7.00″	3.25″	6.75″	1.50″	12
8″	7.63″	19.00″	15.50″	10.63″	.250″	11.50″	8.63″	8.63″	3.63″	8.38″	1.75″	12
10″	9.75″	23.00″	19.00″	12.75″	.250″	14.50″	10.75″	10.25″	4.25″	10.00″	2.00″	12
12″	11.75″	26.50″	22.50″	15.00″	.250″	17.75″	12.75″	11.38″	4.88″	11.13″	2.13″	16
14″	13.00″	29.50″	25.00″	16.25″	.250″	19.50″	14.00″	12.00″	5.25″	11.75″	2.38″	16
16″	15.00″	32.50″	27.75″	18.50″	.250″	21.75″	16.00″	12.50″	5.75″	12.25″	2.63″	16
18″	17.00″	36.00″	30.50″	21.00″	.250″	23.50″	18.00″	13.13″	6.38″	12.88″	2.88″	16
20″	19.00″	38.75″	32.75″	23.00″	.250″	25.25″	20.00″	14.25″	7.00″	14.00″	3.13″	16
24″	23.00″	46.00″	39.00″	27.25″	.250″	30.00″	24.00″	16.25″	8.00″	16.00″	3.63″	16

WN CLASS 2500 (IN INCH)

Weld neck flange dimensions class 2500 (ASME B16.5) in inches

Flange NPS	Inside Diameter	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	H	H1	Raised Face Thickness (T)	T1	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	0.55″	5.25″	3.50″	1.38″	.250″	1.69″	0.84″	3.13″	1.19″	2.88″	0.88″	4
3/4″	0.74″	5.50″	3.75″	1.69″	.250″	2.00″	1.05″	3.38″	1.25″	3.13″	0.88″	4
1″	0.96″	6.25″	4.25″	2.00″	.250″	2.25″	1.32″	3.75″	1.38″	3.50″	1.00″	4
1-1/4″	1.28″	7.25″	5.13″	2.50″	.250″	2.88″	1.66″	4.00″	1.50″	3.75″	1.13″	4
1-1/2″	1.50″	8.00″	5.75″	2.88″	.250″	3.13″	1.90″	4.63″	1.75″	4.38″	1.25″	4
2″	1.94″	9.25″	6.75″	3.63″	.250″	3.75″	2.38″	5.25″	2.00″	5.00″	1.13″	8
2-1/2″	2.32″	10.50″	7.75″	4.13″	.250″	4.50″	2.88″	5.88″	2.25″	5.63″	1.25″	8
3″	2.90″	12.00″	9.00″	5.00″	.250″	5.25″	3.50″	6.88″	2.63″	6.63″	1.38″	8
4″	3.83″	14.00″	10.75″	6.19″	.250″	6.50″	4.50″	7.75″	3.00″	7.50″	1.63″	8
5″	4.81″	16.50″	12.75″	7.31″	.250″	8.00″	5.56″	9.25″	3.63″	9.00″	1.88″	8
6″	5.76″	19.00″	14.50″	8.50″	.250″	9.25″	6.63″	11.00″	4.25″	10.75″	2.13″	8
8″	7.63″	21.75″	17.25″	10.63″	.250″	12.00″	8.63″	12.75″	5.00″	12.50″	2.13″	12
10″	9.75″	26.50″	21.25″	12.75″	.250″	14.75″	10.75″	16.75″	6.50″	16.50″	2.63″	12
12″	11.75″	30.00″	24.38″	15.00″	.250″	17.38″	12.75″	18.50″	7.25″	18.25″	2.88″	12

WELDING NECK FLANGE DIMENSIONS IN MILLIMETERS

WN CLASS 150 (IN MM)

Weld neck flange dimensions class 150 (ASME B16.5) in millimeters

Size inch	D mm	X mm	G mm	t mm	B1 mm	T1 mm	A mm
1/2	89	30.2	35.1	11.2	15.7	47.8	21.3
3/4	99	38.1	42.9	12.7	20.8	52.3	26.7
1	108	49.3	50.8	14.2	26.7	55.6	33.5
1¼	117	58.7	63.5	15.7	35.1	57.2	42.2
1½	127	65.0	73.2	17.5	40.9	62.0	48.3
2	152	77.7	91.9	19.1	52.6	63.5	60.5
2½	178	90.4	104.6	22.4	62.7	69.9	73.2
3	191	108.0	127.0	23.9	78.0	69.9	88.9
3½	216	122.2	139.7	23.9	90.2	71.4	101.6
4	229	134.9	157.2	23.9	102.4	76.2	114.3
5	254	163.6	185.7	23.9	128.3	88.9	141.2
6	279	192.0	215.9	25.4	154.2	88.9	168.4
8	343	246.1	269.7	28.4	202.7	101.6	218.2
10	406	304.8	323.9	30.2	254.5	101.6	273.1
12	483	365.3	381.0	31.8	304.8	114.3	323.9
14	533	400.1	412.8	35.1	336.6	127.0	355.6
16	597	457.2	469.9	36.6	387.4	127.0	406.4
18	635	505.0	533.4	39.6	438.2	139.7	457.2
20	699	558.8	584.2	42.9	489.0	144.5	508.0
24	813	663.4	692.2	47.8	590.6	152.4	609.6

Size	Bolt Drilling			Bolting Requirements
inch	Bolt circle Diameter mm	Holes #	Holes Dia. mm	Bolt Dia. inch.	Length FF Flange	Length RF Flange	Length RTJ Flange
1/2	60.5	4	15.7	1/2	50.8	57.2	–
3/4	69.9	4	15.7	1/2	50.8	63.5	–
1	79.2	4	15.7	1/2	57.2	63.5	76.2
1¼	88.9	4	15.7	1/2	57.2	69.9	82.6
1½	98.6	4	15.7	1/2	63.5	69.9	82.6
2	120.7	4	19.1	5/8	69.9	82.6	95.3
2½	139.7	4	19.1	5/8	76.2	88.9	101.6
3	152.4	4	19.1	5/8	76.2	88.9	101.6
3½	177.8	8	19.1	5/8	76.2	88.9	101.6
4	190.5	8	19.1	5/8	76.2	88.9	101.6
5	215.9	8	22.4	3/4	82.6	95.3	108.0
6	241.3	8	22.4	3/4	82.6	101.6	114.3
8	298.5	8	22.4	3/4	88.9	108.0	120.7
10	362.0	12	25.4	7/8	101.6	114.3	127.0
12	431.8	12	25.4	7/8	101.6	120.7	133.4
14	476.3	12	28.4	1	114.3	133.4	146.1
16	539.8	16	28.4	1	114.3	133.4	146.1
18	577.9	16	31.8	11/8	127.0	146.1	158.8
20	635.0	20	31.8	11/8	139.7	158.8	171.5
24	749.3	20	35.1	1¼	152.4	171.5	184.2

WN CLASS 300 (IN MM)

Weld neck flange dimensions class 300 (ASME B16.5) in millimeters

Size inch	D mm	X mm	G mm	t mm	B1 mm	T1 mm	A mm
1/2	95	38.1	35.1	14.2	15.7	52.3	21.3
3/4	117	47.8	42.9	15.7	20.8	57.2	26.7
1	124	53.8	50.8	17.5	26.7	62.0	33.5
1¼	133	63.5	63.5	19.1	35.1	65.0	42.2
1½	155	69.9	73.2	20.6	40.9	68.3	48.3
2	165	84.1	91.9	22.4	52.6	69.9	60.5
2½	191	100.1	104.6	25.4	62.7	76.2	73.2
3	210	117.3	127.0	28.4	78.0	79.2	88.9
3½	229	133.4	139.7	30.2	90.2	81.0	101.6
4	254	146.1	157.2	31.8	102.4	85.9	114.3
5	279	177.8	185.7	35.1	128.3	98.6	141.2
6	318	206.2	215.9	36.6	154.2	98.6	168.4
8	381	260.4	269.7	41.1	202.7	111.3	219.2
10	445	320.5	323.9	47.8	254.5	117.3	273.1
12	521	374.7	381.0	50.8	304.8	130.0	323.9
14	584	425.5	412.8	63.8	336.6	142.7	355.6
16	648	482.6	469.9	57.2	387.4	146.1	406.4
18	711	533.4	533.4	60.5	438.2	158.8	457.2
20	775	587.2	584.2	63.5	489.0	162.1	508.0
24	914	701.5	692.2	69.9	590.6	168.1	609.6

Size	Bolt Drilling			Bolting Requirements
inch	Bolt circle Diameter mm	Holes #	Holes Dia. mm	Bolt Dia. inch.	Length FF Flange	Length RF Flange	Length RTJ Flange
1/2	66.5	4	15.7	1/2	57.2	63.5	76.2
3/4	82.6	4	19.1	5/8	63.5	76.2	88.9
1	88.9	4	19.1	5/8	63.5	76.2	88.9
1¼	98.6	4	19.1	5/8	69.9	82.6	95.3
1½	114.3	4	22.4	3/4	76.2	88.9	101.6
2	127.0	8	19.1	5/8	76.2	88.9	101.6
2½	149.4	8	22.4	3/4	82.6	101.6	114.3
3	168.1	8	22.4	3/4	88.9	108.0	120.7
3½	184.2	8	22.4	3/4	95.3	108.0	127.0
4	200.2	8	22.4	3/4	95.3	114.3	127.0
5	235.0	8	22.4	3/4	108.0	120.7	133.4
6	269.7	12	22.4	3/4	108.0	120.7	139.7
8	330.2	12	25.4	7/8	120.7	139.7	152.4
10	387.4	16	28.4	1	139.7	158.8	171.5
12	450.9	16	31.8	11/8	146.1	171.5	184.2
14	514.4	20	31.8	11/8	158.8	177.8	190.5
16	571.5	20	35.1	1¼	165.1	190.5	203.2
18	628.7	24	35.1	1¼	171.5	196.9	209.6
20	685.8	24	35.1	1¼	184.2	203.2	222.3
24	812.8	24	41.1	1½	203.2	228.6	254.0

WN CLASS 600 (IN MM)

Weld neck flange dimensions class 300 (ASME B16.5) in millimeters

Size inch	D mm	X mm	G mm	t mm	B1 mm	T1 mm	A mm
1/2	95	38.1	35.1	14.2	B36.10/.19	52.3	21.3
3/4	117	47.8	42.9	15.7	B36.10/.19	57.2	26.7
1	124	53.8	50.8	17.5	B36.10/.19	62.0	33.5
1¼	133	63.5	63.5	20.6	B36.10/.19	66.5	42.2
1½	155	69.9	73.2	22.4	B36.10/.19	69.9	48.3
2	165	84.1	91.9	25.4	B36.10/.19	73.2	60.5
2½	191	100.1	104.6	28.4	B36.10/.19	79.2	73.2
3	210	117.3	127.0	31.8	B36.10/.19	82.6	88.9
3½	229	133.4	139.7	35.1	B36.10/.19	85.9	101.6
4	273	152.4	157.2	38.1	B36.10/.19	101.6	114.3
5	330	189.0	185.7	44.5	B36.10/.19	114.3	141.2
6	356	222.3	215.9	47.8	B36.10/.19	117.3	168.4
8	419	273.1	269.7	55.6	B36.10/.19	133.4	219.2
10	508	342.9	323.9	63.5	B36.10/.19	152.4	273.1
12	559	400.1	381.0	66.5	B36.10/.19	155.4	323.9
14	603	431.8	412.8	69.9	B36.10/.19	165.1	355.6
16	686	495.3	469.9	76.2	B36.10/.19	177.8	406.4
18	743	546.1	533.4	82.6	B36.10/.19	184.2	457.2
20	813	609.6	584.2	88.9	B36.10/.19	190.5	508.0
24	940	717.6	692.2	101.6	B36.10/.19	203.2	609.6

Size	Bolt Drilling			Bolting Requirements
inch	Bolt circle Diameter mm	Holes #	Holes Dia. mm	Bolt Dia. inch.	Length FF Flange	Length RF Flange	Length RTJ Flange
1/2	66.5	4	15.7	1/2	76.2	69.9	76.2
3/4	82.6	4	19.1	5/8	88.9	82.6	88.9
1	88.9	4	19.1	5/8	88.9	82.6	88.9
1¼	98.6	4	19.1	5/8	95.3	88.9	95.3
1½	114.3	4	22.4	3/4	108.0	101.6	108.0
2	127.0	8	19.1	5/8	108.0	101.6	108.0
2½	149.4	8	22.4	3/4	120.7	114.3	120.7
3	168.1	8	22.4	3/4	127.0	120.7	127.0
3½	184.2	8	25.4	7/8	139.7	133.4	139.7
4	215.9	8	25.4	7/8	146.1	139.7	146.1
5	266.7	8	28.4	1	165.1	158.8	165.1
6	292.1	12	28.4	1	171.5	165.1	171.5
8	349.3	12	31.8	11/8	190.5	184.2	196.9
10	431.8	16	35.1	1¼	215.9	209.6	215.9
12	489.0	20	35.1	1¼	222.3	215.9	222.3
14	527.1	20	38.1	13/8	235.0	228.6	235.0
16	603.3	20	41.1	1½	254.0	247.7	254.0
18	654.1	20	44.5	15/8	273.1	266.7	273.1
20	723.9	24	44.5	15/8	285.8	279.4	292.1
24	838.2	24	50.8	17/8	330.2	323.9	336.6

WN CLASS 900 (IN MM)

Weld neck flange dimensions class 300 (ASME B16.5) in millimeters

Size inch	D mm	X mm	G mm	t mm	B1 mm	T1 mm	A mm
1/2	121	38.1	35.1	22.4	B36.10/.19	60.5	21.3
3/4	130	44.5	42.9	25.4	B36.10/.19	69.9	26.7
1	149	52.3	50.8	28.4	B36.10/.19	73.2	33.5
1¼	159	63.5	63.5	28.4	B36.10/.19	73.2	42.2
1½	178	69.9	73.2	31.8	B36.10/.19	82.6	48.3
2	216	104.6	91.9	38.1	B36.10/.19	101.6	60.5
2½	244	124.0	104.6	41.1	B36.10/.19	104.6	73.2
3	241	127.0	127.0	38.1	B36.10/.19	101.6	88.9
4	292	158.8	157.2	44.5	B36.10/.19	114.3	114.3
5	349	190.5	185.7	50.8	B36.10/.19	127.0	141.2
6	381	235.0	215.9	55.6	B36.10/.19	139.7	168.4
8	470	298.5	269.7	63.5	B36.10/.19	162.1	219.2
10	546	368.3	323.9	69.9	B36.10/.19	184.2	273.1
12	610	419.1	381.0	79.2	B36.10/.19	200.2	323.9
14	641	450.9	412.8	85.9	B36.10/.19	212.9	355.6
16	705	508.0	469.9	88.9	B36.10/.19	215.9	406.4
18	787	565.2	533.4	101.6	B36.10/.19	228.6	457.2
20	857	622.3	584.2	108.0	B36.10/.19	247.7	508.0
24	1041	749.3	692.2	139.7	B36.10/.19	292.1	609.6

Size	Bolt Drilling			Bolting Requirements
inch	Bolt circle Diameter mm	Holes #	Holes Dia. mm	Bolt Dia. inch.	Length FF Flange	Length RF Flange	Length RTJ Flange
1/2	82.6	4	22.4	3/4	108.0	101.6	108.0
3/4	88.9	4	22.4	3/4	114.3	108.0	114.3
1	101.6	4	25.4	7/8	127.0	120.7	127.0
1¼	111.3	4	25.4	7/8	127.0	120.7	127.0
1½	124.0	4	28.4	1	139.7	133.4	139.7
2	165.1	8	25.4	7/8	146.1	139.7	146.1
2½	190.5	8	28.4	1	158.8	152.4	158.8
3	190.5	8	25.4	7/8	146.1	139.7	146.1
4	235.0	8	31.8	11/8	171.5	165.1	171.5
5	279.4	8	35.1	1¼	190.5	184.2	190.5
6	317.5	12	31.8	11/8	190.5	184.2	196.9
8	393.7	12	38.1	13/8	222.3	215.9	222.3
10	469.9	16	38.1	13/8	235.0	228.6	235.0
12	533.4	20	38.1	13/8	254.0	247.7	254.0
14	558.8	20	41.1	1½	273.1	266.7	292.1
16	616.0	20	44.5	15/8	285.8	279.4	298.5
18	685.8	20	50.8	17/8	323.9	317.5	333.6
20	749.3	20	53.8	2	349.3	342.9	362.0
24	901.7	20	66.5	1½	438.2	431.8	457.2

DIMENSIONAL TOLERANCE WELDING NECK FLANGE

Certificate	Plate thickness in mm	Width in mm	Length in mm
Outside Diameter	When O is 24″ or less. When O is over 24″.	±0.06″ ±0.12″	±1.6 mm	±3.2 mm
Diameter of Contact Face	0.06″ (1.6 mm) raised face. 0.25″ (6.4 mm) raised face.	±0.03″ ±0.02″	±0.8 mm	±0.5mm
Diameter of Hub at Point of Welding	NPS 5 and smaller. NPS 6 and larger.	+0.09″, -0.03″ +0.16″, -0.03″	+2.4 mm, -0.8mm	+4.0 mm, -0.8 mm
Inside Diameter	NPS 10, 12, 18, 20 and larger.	+0.03″ +0.06″ +0.12″, -0.06″	+0.8 mm +1.6 mm	+3.2 mm, -1.6 mm
Diameter of Hub at Base	Hub Base is 24″or less. Hub Base is over 24″.	+0.06″ +0.12″	+1.6 mm	+3.2 mm
Thickness	NPS 18 and smaller. NPS 20 and larger.	+0.12″ +0.19″	+3.2 mm	+4.8 mm
Drilling and Facings	Bolt circle diameter Bolt Hole Spacing	±0.06″ ±0.03″	±1.6 mm	±0.8 mm
Eccentricity of Bolt Circle and Facing	NPS 2 1/2 and smaller. NPS 3 and larger.	±0.03″ ±0.06″	±0.8 mm	±1.6 mm
Length Through Hub	NPS 10 and smaller. NPS 12 and larger.	±0.06″ ±0.12″	±1.6 mm	±3.2 mm