ASTM A403 WP317 Stainless Steel Stud End B16.9 Buttweld Lap Joint Stub End
ASTM A403 WP317-S Butt Weld Pipe Fittings Stainless Steel Lap Joint Stud End
Stainless steel 317 is an alloy that contains molybdenum, providing good high-temperature strength, excellent resistance to corrosion and pitting, especially in chloride environments. A stub end is a type of fitting usually welded to a pipe to facilitate the connection of another pipe or fitting, which commonly used in piping systems where a quick connection is needed, allowing for easier assembly and disassembly. They're widely used in industries such as chemical processing, oil and gas, and food processing.It has a small cylindrical section and is often paired with a matching flange.
ASTM A403 317/317L Stainless Steel Lap Joint Stud End Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 317 | 1.4449 | S31700 | SUS 317 | – |
| SS 317L | 1.4438 | S31703 | SUS 317L | X2CrNiMo18-15-4 |
ASTM A403 WP317/317L Stainless Steel Lap Joint Stud End Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
| SS 317 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 18.00 – 20.00 | 3.00 – 4.00 | 11.00 – 15.00 | 57.845 min |
| SS 317L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 18.00 – 20.00 | 3.00 – 4.00 | 11.00 – 15.00 | 57.89 min |
ASTM A403 SS 317/317L Butt weld Pipe Fittings Mechanical Properties
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 317/317L | 7.9 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Applications
Lap joint stub ends are commonly used in various industries, including oil and gas, chemical processing, water treatment, and shipbuilding.
They are particularly beneficial in environments where the system may be subject to pressure fluctuations or frequent operational changes.
Penetration Testing
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