Welding neck Flanges

They feature a long tapered hub that can be welded directly to the pipe. This design allows for a smooth transition from the pipe to the flange, minimizing turbulence and pressure loss.

Welding neck flanges are commonly used in high-pressure and high/low temperature applications that require an unrestricted flow of fluid. The hub of the flange is designed to match the thickness of the pipe, ensuring a strong and reliable connection.

These flanges are available in a variety of sizes, materials, and pressure ratings to meet specific application requirements.

 Advantage

Welding neck flanges (WNF) have several advantages that make them a popular choice for various applications, especially in high-pressure and temperature environments. Here are some of the key advantages of welding neck flanges:

 

High Strength:  Good Alignment:  Smooth Flow:  High Leak Resistance:  Versatility:  Long-Term Durability:

In summary, welding neck flanges offer a strong, reliable, and leak-resistant connection between pipes and other pressure-containing equipment. Their smooth flow characteristics, versatility, and long-term durability make them an excellent choice for high-pressure and temperature applications.

Materials

Titanium Flanges:Gr1 / Gr2 / Gr3 /Gr4 / GR5/ Gr7 /Gr9 /Gr11 / Gr12

Alloy Steel: ASTM A182 Grade F1 / F5 / F9 / F11 / F22 / F91

Carbon Steel: ASTM A105 / A105N/A350, ASTM A694 Grade F42 / F46 / F52 / F56 /F60 / F65 / F70

Stainless Steel: ASTM A182 Grade F304 / F304L / F316/ F316L / F310 / F309 / F317L / F321 / F904L / F347

Duplex Stainless Steel: ASTM A182 Grade F44 / F45 / F51 / F53 / F55 / F61 / F60

Nickel Alloys: ASTM B472、ASTM B564、 ASTM B160、Monel 400、Monel K-500、Nickel 200、Inconel 800H/HT、Inconel 825、Inconel 601、Inconel 625、 Inconel 600、Hastelloy C276、Alloy 31

Copper Alloys: ASTM B61 / B152 / B151 / B62

 

Standards

ASME/ANSI B16.5, ASME B16.47, MSS-SP-44, DIN EN 1092/1 11,  ,ASME B31.3