
304 Stainless Steel Flanged Reducer
1. Standard: ASTM A182, ASTM A403
2. Flange size: 1/2”-24”
3. Fitting size: 1/2”- 48”
4. Service: Customized Pre-Fabrication of Pipe Spools
SS 304 Stainless Steel Flanged Reducer prefabricated welding product is a common pipeline connection product. The flange and reducer (including concentric reducer and eccentric reducer) are welded together in advance in the factory. It has good corrosion resistance, oxidation resistance and strength. Stainless steel flange with reducer is suitable for conveying systems in various industrial occasions such as water, oil, gas, chemical media, etc.
Alloy 304 Stainless Flanged Reducer Standard:
- ASTM A182: Stainless Steel Flanges according to ASTM A182 Grade F304, F304L F316L, Etc.
- ASTM A403: Stainless Steel Fittings according to ASTM A403 Grade WP304, WP304L, WP316L, Etc.
- ASTM A312: Stainless Steel Pipes according to ASTM A312 Grade TP304, TP304L, TP3016L, Etc.
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ASME B16.9: Specification for factory-made wrought steel but-welding fittings
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ASME B16.5: Specification for steel pipe flanges and flanged fittings

Manufacturing Process of AISI 304 Stainless Steel Flanged Reducer:
- Welding: The other parts of the prefabricated stainless steel flange reducer are welded using welding techniques such as TIG (argon arc welding) or MIG (gas shielded welding).
- Processing: drilling, grinding and surface treatment to ensure size and surface roughness
- Inspection and testing: pressure test, sealing test, material analysis, etc.
Advantages of Prefabricated Welded Flanged Reducer
- Simple assembly
- Convenient installation
- Good sealing performance
- Long service life
- Cost saving
Stainless Steel Flanged Concentric Reducer Dimensions
| To Suit Pipework NB | Liner Thickness | Face–face A | |||
|---|---|---|---|---|---|
| Large Bore | Small Bore | ||||
| Inches | mm | Inches | mm | mm | mm |
| 3/4″ | 20 | 1/2″ | 15 | 2.0 | 114 |
| 1″ | 25 | 1/2″ | 15 | 2.0 | 114 |
| 1″ | 25 | 3/4″ | 20 | 3.0 | 114 |
| 1.1/2″ | 40 | 1″ | 25 | 4.0 | 114 |
| 2″ | 50 | 1″ | 25 | 4.0 | 127 |
| 2″ | 50 | 1.1/2″ | 40 | 4.5 | 127 |
| 3″ | 80 | 1″ | 25 | 4.0 | 152 |
| 3″ | 80 | 1.1/2 | 40 | 4.5 | 152 |
| 4″ | 100 | 2″ | 50 | 4.8 | 178 |
| 4″ | 100 | 3″ | 80 | 6.5 | 178 |
| 6″ | 150 | 2″ | 50 | 4.8 | 229 |
| 6″ | 150 | 3″ | 80 | 6.5 | 229 |
| 6″ | 150 | 4″ | 100 | 9.0 | 229 |
| 8″ | 200 | 4″ | 100 | 9.5 | 279 |
| 3″ | 80 | 2″ | 50 | 4.8 | 152 |
| 4″ | 100 | 1″ | 25 | 4.0 | 178 |
| 4″ | 100 | 1.1/2 | 40 | 4.5 | 178 |
| 12″ | 300 | 8″ | 200 | 10 | 356 |
| 8″ | 200 | 6″ | 150 | 9.5 | 279 |
| 10″ | 250 | 6″ | 150 | 10 | 305 |
| 10″ | 250 | 8″ | 200 | 10 | 305 |
FAQ
Q: About 304 Stainless Steel Flanged Reducer prices?
Q: How long does your delivery time take?
Q: Is There Sample Service?
Q: What Is The Minimum Order Quantity?
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Q: Exported Countries
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