Weld Neck Flanges

WELD NECK FLANGES

Weld Neck Flanges Manufactures

WELD NECK FLANGES

What is weld neck flanges?

A Weld Neck Flange (also known as a high-hub flange and tapered hub flange) is a type of flange. Generally machined from a forging, these flanges are typically butt welded to a pipe. 

The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.

 

 

Where do use a welding neck flange?

Weld neck flanges are used in applications where the conditions are severe and critical. Some of these conditions include high pressure, wide fluctuations in temperature and pressure, high temperature, fluids that are volatile and hazardous, and temperatures in the sub-zero range.

 

 

How are weld neck flanges made?

A Weld Neck Flange consists of a circular fitting with a protruding rim around the circumference. Generally machined from a forging, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.

 

 

S Nomi is a foremost and authorized company that produces outstanding quality Weld Neck Flanges manufacturers products. Our team of professionals trusts in innovation, research-based production processes and quality. 

S Nomi is one of the pioneering Weld Neck Flanges manufactures in Kolkata, West Bengal, Bihar, Odisha, Jharkhand, and exporter in Kolkata, India.  Hence, we accompany quality training to match the most advanced expectations for the latest technology-based products. 

 

Furthermore, along with quality, we ensure to offer products of different grades in an intact form without affecting its quality. Therefore, we at S Nomi give a comprehensive range of quality flange products considering client requirements. 

 

Additionally, we give primary preference to our client’s operational conditions, and our expert controls the range of product specifications to gain their satisfaction and trust.

Weld Neck Flanges are drilled(machined) with the wall thickness of the flange having the same dimensions of the matching pipe, the lighter the pipe is, the larger the bore, conversely, the heavier the pipe, the small the bore, they are normally used for high pressure, cold or hot temperature.

 

Dimensions

Weld Neck Flanges Manufactures

ANSI, ASME,  ASA, B16.5 WELDING NECK FLANGE RF

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ANSI, ASME, ASA, B16.5 150lb/sq.in. WELDING NECK FLANGE RF
øDbgmaJ*hkHoleslKg.
1/2″88,911,134,930,221,315,747,660,3415,90,500
3/4″98,412,742,938,126,720,852,469,8415,90,700
1″107,914,350,849,233,526,755,679,4415,91,100
1 1/4″117,515,963,558,842,235,157,188,9415,91,500
1 1/2″127,017,573,065,148,340,961,998,4415,91,800
2″152,419,092,177,860,352,663,5120,6419,02,700
2 1/2″177,822,2104,890,573,162,769,8139,7419,04,400
3″190,523,8127,0107,988,978,069,8152,4419,05,200
3 1/2″215,923,8139,7122,2101,690,271,4177,8819,06,400
4″228,623,8157,2134,9114,3102,476,2190,5819,07,500
5″254,023,8185,7163,5141,2128,388,9215,9822,29,200
6″279,425,4215,9192,1168,4154,288,9241,3822,211,000
8″342,928,6269,9246,1219,1202,7101,6298,4822,218,300
10″406,430,2323,8304,8273,0254,5101,6361,91225,425,000
12″482,631,7381,0365,1323,8304,8114,3431,81225,439,000
14″533,434,9412,7400,0355,6336,5127,0476,21228,651,000
16″596,936,5469,9457,2406,4387,3127,0539,71628,660,000
18″635,039,7533,4504,8457,2438,1139,7577,81631,771,000
20″698,542,9584,2558,8508,0488,9144,5635,02031,788,000
22″749,346,0641,2609,6558,8539,7149,2692,12034,9102,000
24″812,847,6692,1663,6609,6590,5152,4749,32034,9119,000
*The data “J” corresponds to the STD schedule


NOTE:

1. Class 150 flanges except Lap Joint will be furnished with 0.06 (1.6mm) raised face, which is included in ‘Thickness’ (C) and ‘Length through Hub’ (Y1), (Y3).

2. For Slip-on, Threaded, Socket Welding and Lap Joint Flanges, the hubs can be shaped either vertical from base to top or tapered within the limits of 7 degrees.

3. Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.

4. The gasket surface and backside (bearing surface for bolting) are made parallel within 1 degree. To accomplish parallelism, spot facing is carried out according to MSS SP-9, without reducing thickness (C).

5. Depth of Socket (D) is covered by ANSI B 16.5 only in sizes through 3 inch, over 3 inch is at the manufacturer’s option.

6. Welding Neck Flange Bore Size SCH10, SCH20, SCH30, STD, SCH40, SCH60, SCH80, SCH100, SCH 120, SCH140, SCH160, XS

Weld Neck Flanges Manufactures
ANSI, ASME, ASA B16.5 300lb/sq.in. WELDING NECK FLANGE RF
øDbgmaJ*hkHoleslKg.
1/2″95,214,334,938,121,315,752,466,7415,90,900
3/4″117,515,942,947,626,720,857,182,5419,01,500
1″123,817,550,854,033,526,761,988,9419,01,900
1 1/4″133,319,063,563,542,235,165,198,4419,02,600
1 1/2″155,620,673,069,848,340,968,3114,3422,23,300
2″165,122,292,184,160,352,669,8127,0819,03,600
2 1/2″190,525,4104,8100,073,162,776,2149,2822,25,400
3″209,528,6127,0117,588,978,079,4168,3822,27,400
3 1/2″228,630,2139,7133,3101,690,281,0184,1822,28,900
4″254,031,7157,2146,0114,3102,485,7200,0822,211,900
5″279,434,9185,7177,8141,2128,398,4234,9822,216,000
6″317,536,5215,9206,4168,4154,298,4269,91222,220,200
8″381,041,3269,9260,3219,1202,7111,1330,21225,431,000
10″444,547,6323,4320,7273,0254,5117,5387,31628,644,300
12″520,750,8381,0374,6323,8304,8130,2450,81631,764,000
14″584,254,0412,7425,4355,6336,5142,9514,32031,788,000
16″647,757,1469,9482,6406,4387,3146,0571,52034,9113,000
18″711,260,3533,4533,4457,2438,1158,7628,62434,9134,000
20″774,763,5584,2587,4508,0488,9161,9685,82434,9171,000
22″838,266,7641,2641,2558,8539,7165,1742,92441,3195,000
24″914,469,8692,1701,7609,6590,5168,3812,82441,3238,000
*The data “J” corresponds to the STD schedule

 

NOTE:

1. Class 300 flanges except Lap Joint will be furnished with 0.06 (1.6mm) raised face, which is included in ‘Thickness’ (C) and ‘Length through Hub’ (Y1), (Y3).

2. For Slip-on, Threaded, Socket Welding and Lap Joint Flanges, the hubs can be shaped either vertical from base to top or tapered within the limits of 7 degrees.

3. Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.

4. The gasket surface and backside (bearing surface for bolting) are made parallel within 1 degree. To accomplish parallelism, spot facing is carried out according to MSS SP-9, without reducing thickness (C).

5. Depth of Socket (D) is covered by ANSI B 16.5 only in sizes through 3 inch, over 3 inch is at the manufacturer’s option.

6. Welding Neck Flange Bore Size SCH10, SCH20, SCH30, STD, SCH40, SCH60, SCH80, SCH100, SCH 120, SCH140, SCH160, XS

Weld Neck Flanges Manufactures
ANSI/ASME/ASA B16.5 600lb/sq.in. WELDING NECK FLANGE RF
øDbgmaJ*hkHoleslKg.
1/2″95,214,334,938,121,315,752,466,7415,90,900
3/4″117,515,942,947,626,720,957,182,5419,01,500
1″123,817,550,854,033,526,761,988,9419,01,900
1 1/4″133,320,663,563,542,235,066,798,4419,02,600
1 1/2″155,622,273,069,848,340,969,8114,3422,23,300
2″165,125,492,184,160,352,673,0127,0819,04,700
2 1/2″190,528,6104,8100,073,162,779,4149,2822,26,500
3″209,531,7127,0117,588,978,082,5168,3822,28,700
3 1/2″228,634,9139,7133,3101,690,185,7184,1825,411,200
4″273,038,1157,2152,4114,3102,4101,6215,9825,418,100
5″330,244,4185,7188,9141,2128,2114,3266,7828,630,500
6″355,647,6215,9222,2168,4154,2117,5292,11228,636,200
8″419,155,6269,9273,0219,1202,7133,3349,21231,756,500
10″508,063,5323,8342,9273,0254,5152,4431,81634,991,000
12″558,866,7381,0400,0323,8304,8155,6488,92034,9105,000
14″603,269,8412,7431,8355,6*165,1527,02038,1125,000
16″685,876,2469,9495,3406,4177,8603,22041,3178,000
18″742,982,5533,4546,1457,2184,1654,02044,4261,000
20″812,888,9584,2609,6508,0190,5723,92444,4268,000
22″869,995,2641,2666,7558,8196,8777,92447,6328,000
24″939,8101,6692,1717,5609,6203,2838,22450,8380,000
*The data “J” corresponds to the STD schedule
To be specifiedby customer

 

NOTE:

1. Class 600 flanges except Lap Joint will be furnished with 0.25 (6.35mm) raised face, which is not included in ‘Thickness’ (C) and ‘Length through Hub’ (Y1), (Y3).

2. For Slip-on, Threaded, Socket Welding and Lap Joint Flanges, the hubs can be shaped either vertical from base to top or tapered within the limits of 7 degrees.

3. Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.

4. The gasket surface and backside (bearing surface for bolting) are made parallel within 1 degree. To accomplish parallelism, spot facing is carried out according to MSS SP-9, without reducing thickness (C).

5. Dimensions of sizes 1/2 through 3 1/2 are the same as for Class 400 Flanges.

6. Depth of Socket (D) is covered by ANSI B 16.5 only in sizes through 3 inch, over 3 inch is at the manufacturer’s option.

7. Welding Neck Flange Bore Size SCH10, SCH20, SCH30, STD, SCH40, SCH60, SCH80, SCH100, SCH 120, SCH140, SCH160, XS.

 

Specification

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