A240 F904L / UNS N08904 STAINLESS STEEL SLIP-ON FLANGE FF FACE
Overview
AWWA C207 is an American National Standard for steel pipe flanges for waterworks service, sizes 4″ through 144″ (100 mm through 3600 mm). The AWWA is the abbreviation of “American Water Works Association”. The origin of AWWA C207 can be dated back to year 1942 when a paper proposing standards for slip-on steel-ring flanges for welding to steel water pipes. This standard was necessary because the lowest pressure ratings for steel flanges at that time were those having cold-water pressure ratings of 275 psi (1896 KPa). The ratings are far higher than those ordinarily needed for water service (150 psi / 1034 KPa) primary pressure rating.
The AWWA C207 flanges are intended for attachment to steel pipes, fittings, valves or other appurtenances in water utility service. The standard has specified two general types of flange: (1) ring-type slip-on flanges, also known as ring flanges or plate flanges; (2) blind flanges. Both the ring flange and blind flange are steel flanges without hub. Besides, in Appendix B, it also provides additional information for dimensions of steel-hub flanges. The AWWA C207 flange can be further classified into four classes according to its working pressure limit: Class B (86 psi), Class D (175-150 psi), Class E (275 psi), Class F (300 psi). The pressure limits are for conditions and temperatures customary in water utility service.
ASTM A240 covers chromium, chromium-nickel, and chromium-manganese-nickel stainless steel plate, sheet, and strip for pressure vessels and for general applications. The steel shall conform to the requirements as to chemical composition specified. The material shall conform to the mechanical properties specified.
Our F904L SS Flanges stands up tremendously well to chlorides in the atmosphere for crevice corrosion andlow pitting, in addition to stress corrosion cracking. These Grade 904L Stainless Steel Flanges merges copper andmolybdenum content in the company of iron content for extremelyaugmented resistance to reducing acids such as sulphuric acid. Made up from top quality of raw materials, these products comply with all industrial quality standards.With several sizes, lengths and dimensional specifications, these UNS N08904 Flangesare also customized as per customer requirements at market leading prices.
Chemical Composition
| Grade | | C | Mn | Si | P | S | Cr | MO | Ni | CU |
| 904L | Min | - | - | - | - | - | 19 | 4 | 23 | 1 |
| max | 0.2 | 2 | 1 | 0.045 | 0.035 | 23 | 5 | 28 | 2 |
Mechanical Composition
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | Brinell (HB) |
| 904L | 490 | 220 | 35 | 70-90 typical | - |
Product Features:
- High corrosion resistance in tough environments
- Accurate dimensions
- Can sustain high pressure & temperature load
- Lower intergranular precipitation
- Smooth transition from flange thickness to pipe
- Ensure excellent stress distribution
- Excellent high temperature oxidation resistance
Product Usage & Application :
- Useful in Paper & Pulp Companies
- Useful in High Pressure Applications
- Useful in Oil and Gas Industry
- Useful in Chemical Refinery
- Useful in Pipeline
- Useful in High Temperature Application
- Useful in Water Pipe Line
- Useful in Nuclear Power Plants
- Useful in Food Processing and Dairy Industries
- Useful in Boiler & Heat Exchangers
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A240 F904L / UNS N08904 STAINLESS STEEL SLIP-ON FLANGE FF FACE Images
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