Welding Neck Flanges
Welding Neck Flanges
A Welding Neck Flanges is a tool that is extensively used in joining pipes. A well-known, effective and reliable joining method for tubes and pipes, it is used in multiple commercial and business sectors where long tubes/pipes have to be connected. Whether it is construction, drilling, sewerage, or any other field, flanges are used in pipes when joints need to be dismantled, inspected or adjusted. It is used so that the pipes can be disassembled in future for maintenance and to fix blockages or leaks if they take place in the pipe. A Welding Neck Flanges is a very important part of pipes and tubes and has been in use for years. However, with time, it has undergone several changes. Today, flanges are available in different designs with improved functionality.
One can find threaded flanges, socket-weld flanges, lap joint flanges, slip-on flanges, blind flanges, weld neck flanges, and more in the market. These Welding Neck Flanges have their own specialty and make joining pipes a cakewalk with their smooth and hassle-free technique. For example, lap joint flanges are used where space is scarce and dismantling is required more often while weld neck flanges are utilized in process piping where piping is done under high pressure and high-temperature conditions.
Welding Neck Flanges Applications
The Welding Neck Flanges procured from Rexal Tubes are applied in tubes and pipes in numerous industries. They are an integral part of the pipeline system in diverse fields such as petroleum, water, oil & gas, pharmaceuticals, desalination, dairy & food processing, refinery & petrochemicals,breweries, and others. The flanges are applied to connect pipes, pumps, valves, and other equipment to create a piping system. The advantage with flanges is that they offer a lot of flexibility. They are detachable and hence, can be removed and fixed again after inspection or adjustment.
Flexibility is the prime feature of Welding Neck Flanges and it works in different fields because piping systems have different requirements and need flexible setting. Also, some pipe systems are quite long and cannot be installed and maintained without the help of Welding Neck Flanges. So, flanges have become a part and parcel of the pipes/tubes system and since they are available in different dimensions and specifications, it is completely possible to meet the unique industrial requirements.
Welding Neck Flanges Description
Other Name: Weld Neck Flanges, WN Flanges, WNRF Flanges, Welding Neck Flanges Weld neck pipe flanges attach to the pipe by welding the pipe to the neck of the pipe flanges.
Standard: ANSI, BS4504, BS10, DIN, UNI, EN1092-1, SABS1123, GOST12821
Size: DN15-DN2000
Material: Carbon Steel, Stainless Steel & High Nickel Alloys
Supply Ability: 1500Ton/Month
Process: Forging, Forged
Packing: Seaworthy Packing
Payment Terms: T/T, L/C
WNRF standards include:
- ANSI B16.5, ASME B16.5, ASA B16.5, WELD NECK FLANGES, WNRF FLANGES, WELDING NECK FLANGES, material carbon steel A105, A350, A36 etc, stainless steel A182 etc, size 1/2″ – 80″, pressure class 150 to class 2500.
- BS4504, WELD NECK FLANGES, WNRF FLANGES, WELDING NECK FLANGES, material carbon steel A105, C22.8, RST37.2, S235JR, P235GH, P245GH, P250GH, P265GH, Q235 etc, size DN15-DN2000, NB15-NB2000, pressure class PN6-PN100, T6/5, T10/5, T16/5, T25/5, T40/5 etc.
- BS10 Table D, Table E, WELD NECK FLANGES, WNRF FLANGES, WELDING NECK FLANGES, material carbon steel A105, C22.8, RST37.2, S235JR, P235GH, P245GH, P250GH, P265GH, Q235 etc, size DN15-DN2000, NB15-NB2000.
- DIN, UNI, EN1092-1, WELD NECK FLANGES, WNRF FLANGES, WELDING NECK FLANGES, material carbon steel A105, C22.8, RST37.2, S235JR, P235GH, P245GH, P250GH, P265GH, Q235 etc, size DN15-DN2000, pressure class PN6, PN10, PN16, PN25, PN40.
- SABS1123, SANS1123, WELD NECK FLANGES, WNRF FLANGES, WELDING NECK FLANGES, material A105, Q235 carbon steel, mild steel, size NB15-NB2000, Class T600/5, T1000/5, T1600/5, T2500/5, T4000/5.
- GOST 12821 FLANGES, WELD NECK FLANGES, WNRF FLANGES, WELDING NECK FLANGES, material carbon steel A105, C22.8, RST37.2, S235JR, P235GH, P245GH, P250GH, P265GH, Q235 etc, size DN15-DN2000, pressure class PN0.6Mpa, PN1.0Mpa, PN1.6Mpa, PN2.5Mpa, PN4.0Mpa.
- 7) JIS B2220, KS B1503, SWELD NECK FLANGES, WNRF FLANGES, WELDING NECK FLANGES, material carbon steel SS400, SF440A, SF390A, size 15A-2000A, Pressure class 5K, 10K, 16K, 20K, 30K, 40K
Welding Neck Flanges Dimensions & Tolerances
Dimensions Weld Neck Flanges ASME B16.5
NPS 1/2 – O.D. 21.3
| Class | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
| Diameter – A | 30 | 38 | 38 | 38 | 38 | 38 | 43 |
| Diameter – D | 90 | 95 | 95 | 95 | 120 | 120 | 135 |
| Thickness – B | 9.6 | 12.7 | 14.3 | 14.3 | 22.3 | 22.3 | 30.2 |
| 11.2 | 14.3 | 20.7 | 20.7 | 28.7 | 28.7 | 36.6 | |
| Diameter – G | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 |
| Diameter – K | 60.3 | 66.7 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| Height – H | 46 | 51 | 52 | 52 | 60 | 60 | 73 |
| 47.6 | 52.6 | 58.4 | 58.4 | 66.4 | 66.4 | 79.4 | |
| Bolt Holes | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Diameter – L | 15.9 | 15.9 | 15.9 | 15.9 | 22.2 | 22.2 | 22.2 |
| Stud Bolts Diameter x Length | |||||||
| Diameter (in) | 1/2 | 1/2 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 |
| Length (mm) | 55 | 65 | 75 | 75 | 110 | 110 | 120 |
————————— > NPS <-------------------------------
Dimensional Tolerances of Welding Neck Flanges ASME B16.5
| Outside Diameter≤ 24 = 1.6 mm | > 24 = ± 3.2 mm | Inside Diameter≤ 10 = ± 0.8 mm | 12 thru 18 = 1.6 mm | ≥ 20 = + 3.2 mm / – 1.6 mm |
| Diameter of Contact Face1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm |
Diameter of Hub at Base≤ 24 = 1.6 mm | > 24 = ± 3.2 mm |
| Diameter of Hub at Point of Welding≤ 5 = + 2.4 mm / – 0.8 mm | ≥ 6 = + 4.0 mm / – 0.8 mm | DrillingBolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm
Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max |
| Thickness≤ 18 = + 3.2 mm / – 0 | ≥ 20 = + 4.8 mm / – 0 | Length thru Hub≤ 10 = 1.6 mm | ≥ 12 = ± 3.2 mm |
Notes
- Dimensions are in millimeters unless otherwise indicated.
- T = Nominal wall thickness of pipe. Bevel for Wall Thicknesses T from 5 mm to 22 mm inclusive.
- The length of the stud bolt does not include the height of the chamfers (points).
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