MSS SP-97 A182 F51 Outlet Fittings
MSS SP-97 A182 F51 Outlet Fittings are an ideal choice for marine, oil & gas, and chloride-containing industries, balancing strength, corrosion resistance, and cost.
High Quality MSS SP-97 A182 F51 Outlet Fittings
- Connection Types: Socket weld, buttweld, threaded.
- Pressure Ratings: Class 3000, 6000, 9000 (~750 psi, 1500 psi, 2250 psi).
- Reinforced Design: Forged construction provides extra thickness at the branch-to-header junction, eliminating the need for reinforcement pads
SSM SP-97 Outlets Fittings Size Types & Class
Correlation of Fittings Class with Schedule Number or Run/Branch Wall Designation of Pipe for Calculation of Ratings
| Class of Fitting | Type | Branch Size | Run Pipe Wall for Ratings Basis | Branch Pipe Wall for Ratings Basis | |
| NPS | DN | ||||
| Standard | Buttwelding | 1/8-24 | 6-600 | Standard | Standard |
| Extra Strong | Buttwelding | 1/8-24 | 6-600 | Extra Strong | Extra Strong |
| Schedule 160 | Buttwelding | 1/2-6 | 15-150 | Schedule 160 | Schedule 160 |
| Double Extra Strong | Buttwelding | 1/2-6 | 15-150 | Double Extra Strong | Double Extra Strong |
| 3000 | Threaded | 1/8-4 | 6-2000 | Extra Strong | Extra Strong |
| 6000 | Threaded | 1/8-2 | 6-50 | Schedule 160 | Schedule 160 |
| 9000 | Threaded | 1/8-2 | 6-50 | Double Extra Strong | Double Extra Strong |
| 3000 | Socket Welded | 1/8-4 | 6-2000 | Extra Strong | Extra Strong |
| 6000 | Socket Welded | 1/8-2 | 6-50 | Schedule 160 | Schedule 160 |
| 9000 | Socket Welded | 1/2-2 | 15-50 | Double Extra Strong | Double Extra Strong |
Material (F51 Duplex Stainless Steel)
Corrosion Resistance:
- Exceptional resistance to chloride stress corrosion cracking (SCC), suitable for seawater and acidic oil & gas environments.
- Resistant to pitting and crevice corrosion (PREN ≥35).
Mechanical Properties:
- High strength: Tensile strength ≥620 MPa (approximately twice that of 316 stainless steel).
- Good low-temperature toughness (applicable down to -50°C).
- Temperature Range: -50°C to +300°C (long-term use), with short-term exposure up to +350°C.
Typical Applications
- Marine Engineering: Seawater cooling systems, subsea Christmas trees.
- Oil & Gas: Gathering and transmission pipelines in sour gas fields (containing H₂S/CO₂).
- Chemical Industry: Transport of chloride-containing media (e.g., brine, hydrochloric acid).
- Desalination Plants: High-pressure reverse osmosis (RO) system branch connections.
- Advantages: Compared to austenitic stainless steel (e.g., 316L), it offers both high strength and corrosion resistance at a lower cost than super duplex stainless steel (e.g., F53).
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SSM has significant product advantages in manufacturing MSS SP-97 A182 F51 Outlet Fittings. Whether it’s quality or price, we will meet your needs.
More Information about MSS SP-97 A182 F51 Outlet Fittings
MSS SP-97 A182 F51 Outlet Fittings are forged branch connection fittings that comply with the following standards:
MSS SP-97: Specifies the design, dimensions, and testing requirements for integrally reinforced forged branch outlet fittings, suitable for socket weld (SW), buttweld (BW), and threaded connections.
ASTM A182 F51: A duplex stainless steel (Duplex Stainless Steel) material standard, corresponding to UNS S31803 (22% chromium, 5% nickel, 3% molybdenum), combining the advantages of austenitic and ferritic structures.
Selection and Installation Guidelines
Selection Criteria:
- Media Compatibility: Suitable for chloride-containing, weakly acidic, or alkaline media. Avoid strongly oxidizing acids (e.g., concentrated nitric acid).
- Temperature and Pressure: Ensure operating temperature ≤300°C and pressure complies with the Class rating.
- Welding Requirements: Use matching filler metals (e.g., ER2209) and control heat input (0.5–2.5 kJ/mm) to avoid sigma phase precipitation.
Installation Notes:
- Welding Process: Preheating is not mandatory, but interpass temperature must be ≤150°C.
- Surface Treatment: Passivation with pickling to restore corrosion resistance (especially post-welding).
- Inspection Requirements: Liquid penetrant testing (PT) or radiographic testing (RT).
Comparison with Other Materials
| arameter | F51 Duplex Steel | A182 F316L | A350 LF2 Carbon Steel |
| Chloride Resistance | Excellent (PREN≥35) | Moderate (PREN≥25) | Poor (requires coating) |
| Strength | ≥620 MPa (tensile) | ≥485 MPa | ≥485 MPa |
| Cost | Moderate (~1.5× 316L) | Baseline | Low |
| Temperature Range | -50°C to +300°C | -196°C to +425°C | -46°C to +343°C |
FAQ
- F53 (UNS S32750) is a super duplex stainless steel with higher chromium (25%) and molybdenum (4%) content, PREN≥40, offering superior corrosion resistance but at a higher cost.
- <10% concentration: Excellent resistance at ambient temperatures
- >10% concentration: Not recommended—consider alloy 20 (N08020)
- Hot concentrated acid: Avoid—use Hastelloy B-3 instead
- Continuous service: -50°C to +300°C (-58°F to 572°F)
- Short-term exposure: Up to 350°C (662°F)
- Avoid: Prolonged use >300°C (risk of embrittlement from sigma phase)
MSS SP-97 A182 F316 Outlet Fittings deliver exceptional corrosion resistance and structural reliability, making them the premier solution for chemical, marine, and other corrosive applications. Selection must carefully consider media composition, concentration, and temperature parameters. Material corrosion testing is advised for extreme conditions.
For detailed dimensional data or technical calculations, please contact our engineering team!
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