Austenitic SS 304 Fittings and Flanges
SS 304 is less electrically and conductive than carbon steel and is essentially non-magnetic. 304 stainless steel Flange and 304 SS pipe fittings come with a higher corrosion resistance than regular steel. 304 grade stainless steel is one of the durable, widely used and dependable austenitic steel in a variety of forms and finishes.
Chemical
| GRADE | NI | CR | Si | C | MN | P | S | N | Fe | |
|---|---|---|---|---|---|---|---|---|---|---|
| SS 304 | MIN % | 8 | 18 | – | – | – | – | |||
| MAX % | 13 | 20 | 0.75 | 0.08 | 2 | 0.045 | 0.03 | 0.1 | BALANCE | |
| SS 304H | MIN % | 8 | 18 | – | – | – | – | |||
| MAX % | 12 | 20 | 0.75 | 0.03 | 2 | 0.045 | 0.03 | 0.1 | BALANCE | |
| SS 304L | MIN % | 8 | 18 | – | 0.04 | – | ||||
| MAX % | 10.5 | 20 | 0.75 | 0.1 | 2 | 0.045 | 0.03 | BALANCE |
One of the other properties of 304 grade stainless steel is that it is excellent corrosion resistance to a wide range of atmospheric conditions and another corrosive effect. The carbon content in this grade SS 304 strengthens it and does not allow the alloy from getting fragile. Due to a wide range of 304 stainless steel properties, it is used in many manufacturing processes and various applications.
PHYSICAL PROPERTIES
| Grade | Density (g/cm3) | Elastic Modulus (GPa) | Mean Co-eff of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat (J/Kg.K) | Electrical Resistivity (nΩ.m) | |||
|---|---|---|---|---|---|---|---|---|---|
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | 0-100°C | ||||
| SS 304/H/L | 8 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Specification of Flange
The specified ASTM Standard Specification for Wrought Austenitic 304 stainless steel flanges is ASTM A182 with manufacturing standard such as ANSI/ASME B16.5, B16.48, BS4504, B 16.47 Series A & B, BS 10, EN-1092, DIN, etc.
Mechanical Properties Of Flange
| Grade | Tensile Strength | Yield Strength | Elongation | Reduction of area |
|---|---|---|---|---|
| [MPA] | [MPA] | (% in 50mm) min | min % | |
| SS 304 | 515 | 205 | 30 | 50 |
| SS 304L | 485 | 170 | 30 | 50 |
| SS 304H | 515 | 205 | 30 | 50 |
According to application and uses in pipes and tubes stainless steel 304 flanges are broadly grouped into different sort, for example, SS 304 Welding Neck Flange(WNF) & Long Welding Neck Flange(LWNF), Slip-on Flange(SOF), Lap Joint Flange(LJW), Blind Flange, Socket Welding Flange (SWF), Threaded Flange(THW), Plate Flange.
SS 304 Flanges for the most part has different face type, for example, Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ), blind flange, with various class rating as 50 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16,din 2.4856 , 25, 40 & ANSI B16.5.
Specification of Fittings
The Specification for Wrought Austenitic 304 stainless steel fittings is ASTM A403, having Specific manufacturing Standards as ASME/ANSI B16.9, ASME B16.28, MSS-SP-43.
Mechanical Properties of Fittings
| Grade | Tensile Strength | Yield Strength |
|---|---|---|
| [MPA] | [MPA] | |
| SS 304/L/H | 515 | 205 |
SS 304 Fittings are categorically available are Elbow, Reducer, Tee, Coupling, Bend, Stub End, Cap, Nipple, Washer, Cross, Union etc. which are available in different types such as Welded, Seamless and Fabricated having thickness range from 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS available with NACE MR 01-75.
Applications
- Off-Shore Oil Drilling Companies
- Power Generation
- Petrochemicals
- Gas Processing
- Specialty Chemicals
- Pharmaceuticals
- Pharmaceutical Equipment
- Chemical Equipment
- Sea Water Equipment
- Heat Exchangers
- Condensers
- Pulp and Paper Industry
