In modern piping systems, creating a reliable and compact branch connection is essential for both safety and performance. The threaded branch outlet fitting manufactured in accordance with MSS SP-97 is widely used in industrial pipelines where welding space is limited or where disassembly and maintenance flexibility are required.
Haihao Group supplies high-quality forged threaded branch outlet fittings designed for pressure-rated piping systems, ensuring tight sealing, strong mechanical performance, and long service life in demanding environments.
What Is a Threaded Branch Outlet Fitting?
A threaded branch outlet fitting is a forged pipe fitting used to create a 90-degree branch connection from a main pipeline using a threaded outlet instead of a welded branch.
Unlike welded branch connections, this type of fitting allows the branch pipe to be screwed directly into the outlet, making installation faster and more convenient in certain applications.
These fittings are commonly applied in low to medium diameter piping systems where easy assembly and maintenance are important design considerations.
Key Features and Advantages
1. Compact and Practical Design
The forged body is engineered to fit tightly on the run pipe while maintaining structural integrity under pressure.
2. Threaded Outlet Connection
The branch side is machined with precision threads, allowing secure and leak-resistant pipe installation.
3. High Pressure Capability
Manufactured in compliance with MSS SP-97, these fittings are suitable for Class 3000 and Class 6000 pressure ratings.
4. Reduced Installation Time
No welding is required on the branch side, which significantly reduces installation complexity and labor cost.
5. Reliable Sealing Performance
Precision machining ensures tight engagement between pipe and fitting, reducing the risk of leakage in service.
Material and Manufacturing Quality
Haihao Group produces threaded branch outlet fittings from high-quality forged materials such as:
- Carbon steel (ASTM A105)
- Stainless steel (ASTM A182 F304 / F316)
- Alloy steel for high-temperature service
Each fitting undergoes strict dimensional inspection and pressure testing to ensure compliance with international standards and customer specifications.
Dimensional Overview
MSS SP-97 threaded branch outlet fitting drawing
| pressure | NPS | A | B | C |
| Class 3000 | 1/2″ | 25.4 | 35.71 | 23.81 |
| Class 3000 | 3/4″ | 26.98 | 43.65 | 29.36 |
| Class 3000 | 1″ | 33.33 | 50.8 | 36.51 |
| Class 3000 | 1 1/4″ | 33.33 | 65.08 | 44.45 |
| Class 3000 | 1 1/2″ | 34.92 | 72.23 | 50.8 |
| Class 3000 | 2″ | 38.1 | 88.1 | 65.08 |
| Class 3000 | 2 1/2″ | 46.03 | 103.18 | 76.2 |
| Class 3000 | 3″ | 50.8 | 122.23 | 93.66 |
| Class 3000 | 3 1/2″ | 53.975 | 132.55 | 101.6 |
| Class 3000 | 4″ | 57.15 | 151.6 | 120.65 |
| Class 3000 | 5″ | 66.67 | 185.73 | 141.28 |
| Class 3000 | 6″ | 69.85 | 219.07 | 169.86 |
| Class 6000 | 1/2″ | 31.75 | 43.65 | 19.05 |
| Class 6000 | 3/4″ | 36.51 | 49.6 | 25.4 |
| Class 6000 | 1″ | 39.68 | 61.91 | 33.33 |
| Class 6000 | 1 1/4″ | 41.27 | 69.05 | 38.1 |
| Class 6000 | 1 1/2″ | 42.86 | 82.55 | 49.21 |
| Class 6000 | 2″ | 52.38 | 102.39 | 69.85 |
Typical Applications
Threaded branch outlet fittings are widely used in:
- Oil and gas piping systems
- Petrochemical processing plants
- Power generation facilities
- Instrumentation and utility pipelines
- High-pressure industrial fluid systems
They are especially suitable for systems where frequent maintenance or future modification is expected.
Why Choose Haihao Group?
With decades of manufacturing experience, Haihao Group provides precision-engineered piping components that meet international quality requirements. Our fittings are produced under strict quality control systems, ensuring reliability in critical applications.
We support customized production, fast delivery, and full material traceability for global engineering projects.
Installation Notes
To ensure safe and reliable performance:
- Use proper thread sealing compounds or tape
- Ensure correct torque during installation
- Avoid over-tightening to prevent thread damage
- Follow applicable piping codes such as ASME B31.3
Threaded branch outlet fittings manufactured under MSS SP-97 offer a practical and efficient solution for creating branch connections in pressure piping systems. With strong sealing performance and easy installation, they are widely trusted across multiple industries.
Haihao Group is committed to delivering high-quality forged fittings that meet global standards and support safe, long-term pipeline operation.
FAQ
Q1: What is a threaded branch outlet fitting used for?
It is used to create a 90-degree branch connection from a main pipeline without welding on the branch side.
Q2: What pressure ratings are available?
Common pressure classes include Class 3000 and Class 6000 depending on application requirements.
Q3: What materials are available?
Carbon steel, stainless steel, and alloy steel materials are available for different service conditions.
Q4: What standard governs these fittings?
They are manufactured according to MSS SP-97.
Q5: Where are these fittings commonly used?
They are widely used in oil & gas, petrochemical, power plants, and industrial piping systems.
