Titanium weld neck flange excel in systems used in chemical, offshore, aerospace, and high-purity media transport applications. Precision-forged from high-quality titanium, titanium's high corrosion resistance ensures long-term structural integrity and sealing reliability in harsh environments, significantly reducing maintenance costs and extending equipment life.
Weld neck titanium flange are pipe fittings with a round tube transition structure. They are welded to the pipe and are primarily used in high-pressure, high-temperature, or media-sensitive piping systems. The flared transition neck structure distances the weld from the sealing surface, reducing weld distortion and improving sealing performance. This design significantly enhances system sealing and long-term stability under high-pressure, high-temperature, or cyclic loading conditions, making them an ideal choice for demanding applications.
Titanium flanges with weld neck available with all standard sizes to meet your needs. Furthermore, our robust customization capabilities allow us to produce flanges to meet your specific pressure ratings, connection standards, or special dimensions. Whether standard or custom, we are committed to providing high-quality titanium flange solutions that meet your precise needs, making us your reliable partner.
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Standard |
ASME，ANSI |
|
Material Designation |
TA1,TA2,TA9,TA10,GR1,GR2,GR7,GR12,GR16,N5,N6,N7 etc |
|
Size |
NPS 1/2-NPS 24 |
|
OEM&ODM |
Available |
|
Pressure |
Class150，Class300，Class600，Class900，Class1500，Class2500 |
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Technics |
Forged |
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Sealing surface |
RF,MFM,TG,FF,RJ |
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Type |
Weld Neck Flange |
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Packaging |
Export Standard Wooden case, or can be customized |
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Application |
Petroleum, chemical, shipbuilding, pharmaceutical, metallurgy, machinery, stamping elbow, food and other |
Class 300（PN50）
(mm)
| Nominal Dimension | Outer diameter of steel pipe A |
Connection size | Flange thickness C |
Flange neck big end N |
Flange inner diameter B |
Flange height H |
|||||
| DN | NPS | Flange outer diameter D |
Diameter of center circle of bolt hole K |
Bolt hole diameter L |
Bolt Th |
Number of bolt holes n(pc) |
|||||
| 15 | 1/2 | 21.3 | 95 | 66.7 | 16 | M14 | 4 | 12.7 | 38 | 15.5 | 51 |
| 20 | 3/4 | 26.9 | 115 | 82.6 | 18 | M16 | 4 | 14.3 | 48 | 21 | 56 |
| 25 | 1 | 33.7 | 125 | 88.9 | 18 | M16 | 4 | 15.9 | 54 | 27 | 60 |
| 32 | 1-1/4 | 42.4 | 135 | 98.4 | 18 | M16 | 4 | 17.5 | 64 | 35 | 64 |
| 40 | 1-1/2 | 48.3 | 155 | 114.3 | 22 | M20 | 4 | 19.1 | 70 | 41 | 67 |
| 50 | 2 | 60.3 | 165 | 127.0 | 18 | M16 | 8 | 20.7 | 84 | 52 | 68 |
| 65 | 2-1/2 | 76.1 | 190 | 149.2 | 22 | M20 | 8 | 23.9 | 100 | 66 | 75 |
| 80 | 3 | 88.9 | 210 | 168.3 | 22 | M20 | 8 | 27.0 | 117 | 77.5 | 78 |
| 100 | 4 | 114.3 | 255 | 200.0 | 22 | M20 | 8 | 30.2 | 146 | 101.5 | 84 |
| 125 | 5 | 139.7 | 280 | 235.0 | 22 | M20 | 8 | 33.4 | 178 | 127 | 97 |
| 150 | 6 | 168.3 | 320 | 269.9 | 22 | M20 | 12 | 35.0 | 206 | 154 | 97 |
| 200 | 8 | 219.1 | 380 | 330.2 | 26 | M24 | 12 | 39.7 | 260 | 203 | 110 |
| 250 | 10 | 273 | 445 | 387.4 | 30 | M27 | 16 | 46.1 | 321 | 255 | 116 |
| 300 | 12 | 323.9 | 520 | 450.8 | 33 | M30 | 16 | 49.3 | 375 | 303.5 | 129 |
| 350 | 14 | 355.6 | 585 | 514.4 | 33 | M30 | 20 | 52.4 | 425 | — | 141 |
| 400 | 16 | 406.4 | 650 | 571.5 | 36 | M33 | 20 | 55.6 | 483 | — | 144 |
| 450 | 18 | 457 | 710 | 628.6 | 36 | M33 | 24 | 58.8 | 533 | — | 157 |
| 500 | 20 | 508 | 775 | 685.8 | 36 | M33 | 24 | 62.0 | 587 | — | 160 |
| 600 | 24 | 610 | 915 | 812.8 | 42 | M39×3 | 24 | 68.3 | 702 | — | 167 |
Titanium flanges, with their high strength-to-weight ratio, high-temperature resistance, corrosion resistance and
excellent fatigue performance,have become core components in six high-end sectors: Aerospace,Petrochemicals,
Marine Engineering, New Energy, Electronics and Environmental Protection.
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