ASTM A182 F316/F316L Stainless Steel Fitting Weldolet BW MSS-SP-97
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ASTM A182 F316/F316L Stainless Steel Fitting Weldolet BW MSS-SP-97
What is weldolet?
A Weldolet is a type of branch connection fitting used in piping systems to create a secure, high-integrity outlet from a main run pipe. It is a welded reinforcement fitting designed according to standards like MSS-SP-97. The fitting is welded directly onto the main pipe, and the branch pipe is then welded to the outlet of the Weldolet. This design provides significant structural reinforcement, minimizes stress concentration, and ensures a smooth flow transition. Weldolets are particularly valued in critical applications—such as high-pressure, high-temperature, or corrosive service—where system integrity and reliability are paramount. The use of materials like ASTM A182 F316/F316L stainless steel further enhances their corrosion resistance and durability in demanding environments.
Chemical & Mechanical Properties
| ASTM A182 F316/316L Chemical Composition (%) | |||||||
| C | Mn | Si | P | S | Cr | Mo | N |
| ≤0.08% / 0.03% | ≤2.00% | ≤1.00% |
≤0.045% |
≤0.030% | 16.0%-18.0% | 2.0%-3.0% |
0%-0.1% |
Mechanical Properties
| Tensile Strength | Yield Strength (0.2% offset) | Elongation |
Reduction of Area
|
|
| TP316 | ≥515Mpa | ≥205Mpa | ≥30% | ≥50% |
| TP316L | ≥485Mpa | ≥170Mpa | ≥30% | ≥50% |
|
Heat Treat Type
|
Austenitizing/Solutioning
Temperature °F [°C]
|
Cooling Media
|
Quenching Cool Below °F [°C] |
|
solution treat and quench
|
1900 [1040]
|
liquid
|
500 [260]
|
Key Applications
- Oil and Gas Industry Process and Transmission Pipelines
- Chemical and Petrochemical Production Plants
- Power Generation Stations (Fossil and Nuclear) High-Pressure Steam and Feedwater Systems
- Shipbuilding and Offshore Engineering Piping Systems
- Food, Pharmaceutical, and Biotechnology Industries High-Sanitary Grade Piping
Specifications of weldolet
| Size | 1/8" - 4" / DN6 - DN100 |
| Pressure | 3000lbs / 6000lbs |
| Manufacturing Standard | MSS SP-97 |
| Carbon Steel | ASTM A105, 20# |
| Low Temperature Steel | ASTM A350 LF2, 16Mn |
| Alloy Steel | ASTM A182 F11 / F12 / F5 / F9 / F91 / F92 |
| Stainless Steel | ASTM A182 F304/304L/304H, 316/316L, 310S, 317,347,904L |
| Duplex Steel | ASTM A182 F51, F53, F44 |
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