Weld Neck Flange

Approx Price:

₹1,200.00

Size : 1/2″ (15 NB) to 48″ (1200NB)
Standards : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Pressure Ratings : Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc.
Stainless Steel Weld Neck Flanges : ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
Alloy Steel Weld Neck Flanges : ASTM A182 F1, F5, F9, F11, F22, F91
Special Alloy Weld Neck Flanges : Duplex, Super Duplex, Nickel Alloys Flange Face Type: Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

A Weld Neck Flange (WN Flange) is a type of flange designed for high-pressure and high-temperature applications, commonly used in piping systems and industrial equipment. Its distinguishing feature is the long, tapered hub that gradually transitions into the pipe, providing excellent reinforcement and reducing stress concentration at the base. This design ensures durability and reliability in demanding environments.

Applications of Weld Neck Flanges:

Weld Neck Flanges are widely used in industries where durability, safety, and efficiency are critical, including:

Oil and Gas Industry: For pipelines carrying crude oil, natural gas, and refined products.
Petrochemical Plants: To manage high-pressure chemical processes.
Power Plants: In steam and water systems for power generation.
Marine Industry: For shipbuilding and offshore platforms.
Pharmaceutical and Food Processing: Ensuring hygienic and secure connections

Technical Specifications of Weld Neck Flanges
Specification	Details
Size	1/2″ (15 NB) to 48″ (1200 NB)
Standards	ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Pressure Ratings	Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500, Class 2500 PN6, PN10, PN16, PN25, PN40, PN64, etc.
Carbon Steel Weld Neck Flanges	ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 Steel RST37.2, C22.8
Stainless Steel Weld Neck Flanges	ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
Alloy Steel Weld Neck Flanges	ASTM A182 F1, F5, F9, F11, F22, F91
Special Alloy Weld Neck Flanges	Duplex, Super Duplex, Nickel Alloys
Flange Face Type	Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Coating/Surface Treatment	Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Value Added Services	CNC Machining, Customized Flanges

Weld Neck Flange Dimensions & Weight

NPS	A	B	C	D	E	F	G	H	I	J	W
	inch	inch	inch	inch	inch	inch	inch	No. of Holes	inch	inch	kg/pc
	mm	mm	mm	mm	mm	mm	mm	No. of Holes	mm	mm	kg/pc
1/2	3.500	0.620	0.440	1.880	0.840	1.190	1.380	4	0.620	2.380	0.48
1/2	88.90	15.70	11.20	47.80	21.30	30.20	35.00	4	15.70	60.45	0.48
3/4	3.880	0.820	0.500	2.060	1.050	1.500	1.690	4	0.620	2.750	0.71
3/4	98.60	20.80	12.70	52.30	26.70	38.10	42.90	4	15.70	69.85	0.71
1	4.250	1.050	0.560	2.190	1.320	1.940	2.000	4	0.620	3.120	1.01
1	108.0	26.70	14.20	55.60	33.50	49.30	50.80	4	15.70	79.25	1.01
1-1/4	4.620	1.380	0.620	2.250	1.660	2.310	2.550	4	0.620	3.500	1.33
1-1/4	117.3	35.10	15.70	57.15	42.20	58.70	63.50	4	15.70	88.90	1.33
1-1/2	5.000	1.610	0.690	2.440	1.900	2.560	2.880	4	0.620	3.880	1.72
1-1/2	127.0	40.90	17.50	62.00	48.30	65.00	73.15	4	15.70	98.60	1.72
2	6.000	2.070	0.750	2.500	2.380	3.060	3.620	4	0.750	4.750	2.58
2	152.4	52.60	19.10	63.50	60.45	77.70	91.90	4	19.10	120.7	2.58
2-1/2	7.000	2.470	0.880	2.750	2.880	3.560	4.120	4	0.750	5.500	4.11
2-1/2	177.8	62.70	22.40	69.85	73.15	90.40	104.6	4	19.10	139.7	4.11
3	7.500	3.070	0.940	2.750	3.500	4.250	5.000	4	0.750	6.000	4.92
3	190.5	78.00	23.90	69.85	88.90	108.0	127.0	4	19.10	152.4	4.92
3-1/2	8.500	3.550	0.940	2.810	4.000	4.810	5.500	8	0.750	7.000	6.08
3-1/2	215.9	90.20	23.90	71.40	101.6	122.2	139.7	8	19.10	177.8	6.08
4	9.000	4.030	0.940	3.000	4.500	5.310	6.190	8	0.750	7.500	6.84
4	228.6	102.4	23.90	76.20	114.3	134.9	157.2	8	19.10	190.5	6.84
5	10.00	5.050	0.940	3.500	5.560	6.440	7.310	8	0.880	8.500	8.56
5	254.0	128.3	23.90	88.90	141.2	163.6	185.7	8	22.40	215.9	8.56
6	11.00	6.070	1.000	3.500	6.630	7.560	8.500	8	0.880	9.500	10.6
6	279.4	154.2	25.4	88.90	168.4	192.0	215.9	8	22.40	241.3	10.6
8	13.50	7.980	1.120	4.000	8.630	9.690	10.62	8	0.880	11.75	17.6
8	342.9	202.7	28.40	101.6	219.2	246.1	269.7	8	22.40	298.5	17.6
10	16.00	10.02	1.190	4.000	10.75	12.00	12.75	12	1.000	14.25	24.0
10	406.4	254.5	30.20	101.6	273.0	304.8	323.8	12	25.40	362.0	24.0
12	19.00	12.00	1.250	4.500	12.75	14.38	15.00	12	1.000	17.00	36.5
12	482.6	304.8	31.75	114.3	323.8	365.3	381.0	12	25.40	431.8	36.5
14	21.00		1.380	5.000	14.00	15.75	16.25	12	1.120	18.75	48.4
14	533.4		35.10	127.0	355.6	400.1	412.7	12	28.40	476.3	48.4
16	23.50		1.440	5.000	16.00	18.00	18.50	16	1.120	21.25	60.6
16	596.9		36.60	127.0	406.4	475.2	469.9	16	28.40	539.8	60.6
18	25.00		1.560	5.500	18.00	19.88	21.00	16	1.250	22.75	68.3
18	635.0		39.60	139.7	457.2	505.0	533.4	16	31.75	577.9	68.3
20	27.50		1.690	5.690	20.00	22.00	23.00	20	1.250	25.00	84.5
20	698.5		42.90	144.5	508.0	558.8	584.2	20	31.75	635	84.5
24	32.00		1.880	6.000	24.00	26.12	27.25	20	1.380	29.50	115
24	812.8		47.80	152.4	609.6	663.4	692.1	20	35.10	749.3	115

Weld Neck Flange

Applications of Weld Neck Flanges:

Technical Specifications of Weld Neck Flanges

Weld Neck Flange Dimensions & Weight

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