WN:Weld Neck Flange

1.What are Weld Neck Flanges?

ASME B16.5 Weld neck flanges are distinguished by their protruding necks. These flanges are seamlessly welded onto the end of a pipe, creating a robust and leak-proof connection. The unique design of the welding neck flange provides superior strength and stress distribution, making it an ideal choice for high-pressure, high-temperature, and high-impact applications. DLFT flanges are meticulously manufactured from premium materials, ensuring longevity and reliability.
OEM/ODM orders of weld neck flange accepted.
Dedicated inspections department that examines each welding neck flange to ensure the highest quality workmanship for your job.
 

WN WELD NECK FLANGES

WN WELDING NECK FLANGES

black painted welding neck flanges

Top Quality Standard or No-Standard Weld Neck Flanges Supply At Competitive Prices From DLFT CO.,LTD.

Wide variety of custom steel weld neck flanges in accordance with international quality standards, from ANSI to JIS and DIN. Our highly durable, corrosion resistant and reliable Welding Neck Flanges are win great reputation in engineering, construction, chemical, oil field, power plant and other industries.

2.Standard Specification For Weld Neck Flanges

Dimensions : ANSI ASME B16.5, ANSI ASME B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings

ASME Size : 1/2" to 48"

DIN:DN15 to DN1200

EN 1092-1

DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673

BS : BS4504 ,  BS1560, BS10

DIN, BS4504, SABS1123, EN1092-1, UNI, AS2129, GOST-12820

JIS B2220

KS B 6216 

3.Surface Treatment: Anti-rust Oil, Transparent/Black Anti-rust Paint/Hot dipped Galvanized.

4.Weld Neck Flange Pressure Grade

ANSI Class : 150, 300, 600, 900, 1500, 2500 LBS,
DIN Standard PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160, PN250, PN320, PN400
JIS B2220：5K、10K、16K、20K、30K、40K、63K

5.Material & Grades of Weld Neck Flanges  

Carbon Steels:A516 Gr.70 ANTI-HIC, A694 F52 / F60 / F65 / F70, A105, SA-266M, 20#, 16Mn, 16MnHIC, 20#HIC, and equivalents.

Alloy Steels:SA182-F11, SA182-F22, 15CrMo, 20MnMoNb, 25Cr2MoVA, 14Cr1Mo, 12Cr2Mo1, 08Cr2AlMo, 12Cr5Mo, 38CrMoAl, 20MnNiMo, SA-508 Gr.3, and equivalents.

Low-Temperature Steels:SA350 LF1 / LF2 / LF3, 09MnNiD, 16MnD, 20MnMoD, 08Ni3D, 10NiMoVD, and equivalents.

Stainless Steels:F304 / 304L / 304H (1.4306), F316 / 316L / 316H (1.4404), F321 (1.4541), 316Ti (1.4571), F347 / F347H (1.4550), F317 (1.4449), F310 (1.4845), F904L (S39042 / 1.4539), X2CrNiMo25-22-2, SA-182M F310MoLN, A182 F6NM, A182 F6a, and equivalents.

Duplex & Super Duplex Stainless Steels:S31803 (2205), F51 (S22253), F60 (S22053 / 2205), F53 (S25073 / 2207), and equivalents.

Specialty Alloys & Nickel Alloys:SB462-N08020, Incoloy 800, UNS N08020, B564 UNS N10276, UNS N08367, NS1403, and equivalents.

6.Sealing Surface Types For Weld Neck Flanges

RF (Raised Face);                                  EN 1092-1 Type B
FF (Flat Face);                                        EN 1092-1 Type A
M&F (Male-and-Female Face);       EN 1092-1 Type C
RTJ (Ring-Type Joint)                        EN 1092-1  Type E
F (Female Face);
M (Male Face);
T&G (Tongue and Groove Face);   EN 1092-1Type D
Among them, the uneven surface (MFM) is a matching use; 

FLANGE SEALING FACE TYPES

tongue-and-groove-flange

7.WN Flange Application

The inherent properties of WN Welding Neck Flanges, such as their ability to withstand extreme conditions, make them indispensable in various applications. They are used in oil and gas, Chemical,petrochemicals, Oil Field, water treatment, and power generation  Engineering, Construction, Offshore, Water System, Shipbuilding, Natural Gas, Electric Power, Manufacturing Industry, Pipe Projects etc. The design ensures a smooth flow of fluids, minimizing turbulence and erosion. DLFT weld neck flanges are adaptable to varied pressures and temperatures, catering to the specific needs of each industry.