Home > Long Weld Neck Flanges
Long Weld Neck Flangesplays a key role in piping design, particularly in high-pressure uses. Their extended necks permit improved flow and lower stress, boosting connection strength. They are constructed from tough materials such as carbon steel, stainless steel, alloy steel, etc. They matter in sectors like oil, gas, petrochemicals, and power generation. These flanges deliver outstanding mechanical properties and long service life, making them a dependable option for challenging applications that call for durability and safety.
Specifications :ASTM B462 / ASME SB462
Dimensions :ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Standard :ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, and more.
Size :1/2″NB TO 60″NB
Class / Pressure :150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 and so on.
Flange Face Type :Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Stainless Steel Long Weld Neck Flanges :
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L
Duplex & Super Duplex Steel Long Weld Neck Flanges :
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
Carbon Steel Long Weld Neck Flanges :
ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706
Low Temperature Carbon Steel Long Weld Neck Flanges :ASTM A350, LF2, LF3
Alloy Steel Long Weld Neck Flanges :
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Copper Alloy Steel Long Weld Neck Flanges : ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
Nickel Alloy Long Weld Neck Flanges :
ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020)
| Long Weld Neck Flange | Long Welding Neck Flanges |
| ANSI B16.5 Long Weld Neck Flanges | Long Weld Neck Flange Dimensions |
| ASME B16.5 Long Weld Neck Flanges | ANSI B16.5 Class 150 Long Weld Neck Flanges |
| Stainless Steel Long Weld Neck Flanges Suppliers | SS Long Welding Neck Flange |
| Long Weld Neck Plate Flanges Dealer | ASME B16.47 Series A and B Long Weld Neck Flanges Exporter |
| ANSI B16.5 class 150 Long Weld Neck Flange Stockholder | ANSI 150 Long Weld Neck Flange Distributors |
| Carbon Steel Long Welding Neck Flange | High Quality Long Weld Neck Flanges Manufacturer |
| ASTM A182 Stainless Steel Long Weld Neck Flange | Duplex Steel Long Weld Neck Flange |
| Super Duplex Steel Long Weld Neck Forged Flange | Copper Nickel Long Weld Neck Pipe Flanges |
| High Nickel Alloy Long Welding Neck Flanges | Hastelloy Flat Faced Long Weld Neck Flanges Stockist |
| Titanium ASME B16.47 Series A and B Long Weld Neck Flanges | Inconel Long Weld Neck Flanges |
At Koasteel, we take pride in being the largest supplier and manufacturer in the New Zealand, providing innovative solutions for all your piping requirements. With cutting-edge production facilities strategically situated in the New Zealand, we maintain an extensive inventory of more than 25,000 tons of top-quality materials kept ready in stock.
Reach out to us for a fast quote tailored to your needs.
We provide these Long Weld Neck Flanges in accordance with DIN, ISO, JIS or ANSI Standard.
Long Weld Neck Flanges are used extensively across many industries because they offer outstanding mechanical properties and hold up well against wear, corrosion, and elevated temperatures. You’ll find these flanges commonly applied in the oil and gas, petrochemical, power generation, and aerospace sectors. They serve a key role in connecting equipment, valves, and piping systems. Thanks to their remarkable strength, toughness, and resistance to wear, they are ideally suited for uses subjected to demanding operating conditions, including high temperatures, high pressures, and corrosive settings.
Yes, long weld neck flanges are recyclable once their service life ends. Because they are produced from recyclable materials like carbon steel, stainless steel, and alloy steels, they can be melted and reused to make new products, promoting sustainability and lowering environmental impact.
Email: sales@koasteel.nz
