Welding Neck Flange

TRIO STEEL IS A LEADING MANUFACTURER, SUPPLIER AND EXPORTER OF Flanges.

We provide a complete and best quality range of Welding Neck Flanges.Welding Neck Flanges are used in constructions, food industry, pharmaceutical industry, petrochemical industry, automotive industry, municipal and decorative purposes. All Welding Neck Flanges are individually covered so that the premium quality of materials is retained and there are no damges in the last stages of production.

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:

  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. 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.
  6. 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. 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 Face

1.6 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

Drilling

Bolt 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

  1. Dimensions are in millimeters unless otherwise indicated.
  2. T = Nominal wall thickness of pipe. Bevel for Wall Thicknesses T from 5 mm to 22 mm inclusive.
  3. The length of the stud bolt does not include the height of the chamfers (points).

Welding Neck Flanges Packaging & Marking


Welding Neck Flanges Packaging & Marking

All Welding Neck Flanges are individually covered so that the premium quality of materials is retained and there are no damges in the last stages of production. We also ensure that we deliver our orders promplty and that the quality remains intact.
All Welding Neck Flanges have imprints on them to highlight the specification of the pipes.

Origin of material (Make)

arcelor-mittal-romania dalmine-italy jfe-steel-japan jindal-saw-ltd-india sumitomo-metals-japan nipponsteel-japan mukat-tanks-and-vessel-ltd-india mannesmann-brazil maharashtra-seamless-limited-india tubacex-spain welspun-india v-and-m-japan-1 Tenaris

Available stock at Trio Steel

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