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| Categories | Stainless Steel Flanges |
|---|---|
| Brand Name: | Yuhao |
| Model Number: | flanges |
| Certification: | ISO, API, BV, CE ... |
| Place of Origin: | China |
| MOQ: | 100KGS |
| Price: | Negotation |
| Payment Terms: | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability: | 2000tons/per month |
| Delivery Time: | 2-10 work days |
| Packaging Details: | They are usually packed in conventional export wooden cases. |
| Material: | 304, 304L, 306, 306L, 316, 316L |
| Application: | Connection, Decoration, oil and gas, Automative, New Energy |
| Standard: | ASTM, AISI, GB, JIS |
| Flange face type: | RF (Raised Face), RTJ (Ring Type Joint) |
| Package: | Standard Seaworthy Packagel, wooden cases... |
| Connection: | Welding |
| Pressure: | Class150/300/600/9001500/2500 |
| Dimensions: | 1/2”, 2”, 3”, 4”, 6”, 8”, 10”, up to 24” |
| Company Info. |
| Zhejiang Yuhao Stainless Steel Co., Ltd |
| Verified Supplier |
| View Contact Details |
| Product List |
| Attribute | Value |
|---|---|
| Material | 304, 304L, 306, 306L, 316, 316L |
| Application | Connection, Decoration, Oil and Gas, Automotive, New Energy |
| Standard | ASTM, AISI, GB, JIS |
| Flange Face Type | RF (Raised Face), RTJ (Ring Type Joint) |
| Package | Standard Seaworthy Packaging, Wooden Cases |
| Certification | ISO, API, BV, CE |
| Connection | Welding |
| Pressure | Class150/300/600/9001500/2500 |
| Dimensions | 1/2", 2", 3", 4", 6", 8", 10", up to 24" |
| Brand Name | Yuhao |
The weld neck flange is characterized by its extended, conically tapered hub, which is specifically engineered for butt-welding to a pipe or pressure vessel nozzle. This design facilitates a full-penetration, circumferential butt weld that ensures optimal mechanical strength and metallurgical continuity across the joint. The tapered hub geometry enables a gradual transition of stress from the flange to the pipe wall, thereby reducing stress concentrations and enhancing fatigue resistance, particularly under cyclic loading, elevated temperatures, and high-pressure service conditions.
Weld neck flanges are predominantly employed in critical service applications across industries such as petrochemical processing, oil and gas transportation, offshore and subsea systems, and thermal and nuclear power generation. These flanges are manufactured in accordance with international standards such as ASME B16.5, B16.47, and EN 1092, and are available in a wide range of pressure classes and facing types. Material selection—including carbon steels, austenitic and duplex stainless steels, and high-performance alloy steels—is determined based on application-specific requirements such as corrosion resistance, temperature tolerance, and mechanical performance under design conditions.
| DN | Pipe OD | Connection Size | Flange Thickness (mm) | C | Flange ID |
|---|---|---|---|---|---|
| 10 | 17.2 | 14 | 90 | 60 | 14 |
| 15 | 21.3 | 18 | 95 | 65 | 14 |
| 20 | 26.9 | 25 | 105 | 75 | 16 |
| 25 | 33.7 | 32 | 115 | 85 | 16 |
| 32 | 42.4 | 38 | 140 | 100 | 18 |
| 40 | 48.3 | 45 | 150 | 110 | 18 |
| 50 | 60.3 | 57 | 165 | 125 | 19 |
| 65 | 76.1 | 76 | 185 | 145 | 20 |
| 80 | 88.9 | 89 | 200 | 160 | 20 |
| 100 | 114.3 | 108 | 220 | 180 | 22 |
| 125 | 139.7 | 133 | 250 | 210 | 22 |
| 150 | 168.3 | 159 | 285 | 240 | 24 |
| 200 | 219.1 | 219 | 340 | 295 | 24 |
| 250 | 273 | 273 | 395 | 350 | 26 |
| 300 | 323.9 | 325 | 445 | 400 | 26 |
| 350 | 355.6 | 377 | 505 | 460 | 28 |
| 400 | 406.4 | 426 | 565 | 515 | 32 |
| 450 | 457 | 480 | 615 | 565 | 36 |
| 500 | 508 | 530 | 670 | 620 | 38 |
| 600 | 610 | 630 | 780 | 725 | 42 |
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