MSS SP-97 A350 LF2 Outlet Fittings
MSS SP-97 A350 LF2 Outlet Fittings are critical components for low-temperature, high-pressure systems, especially in LNG and Arctic oil/gas projects.
High Quality MSS SP-97 A350 LF2 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 |
A350 LF2 Material Properties
A low-temperature carbon steel forging material per ASTM standards
Key Properties:
- Low-Temperature Toughness: Suitable for environments as low as -46°C (Arctic, LNG applications)
- Chemical Composition: Contains nickel (Ni 0.4% max) and molybdenum (Mo 0.12% max) for enhanced impact resistance
- Mechanical Properties: Tensile strength ≥485 MPa, yield strength ≥250 MPa
Typical Applications
- Liquefied Natural Gas (LNG): Receiving terminal piping, cryogenic pump inlets/outlets
- Arctic Oil & Gas Fields: Wellhead equipment and gathering pipelines in low-temperature environments
- Chemical Industry: Branch connections for ethylene, liquid ammonia, and other cryogenic media
Advantages:
- Eliminates weld reinforcement risks in low-temperature brittle fracture scenarios
- Reduces installation time (30% faster than traditional reinforcement methods)
One-Stop MSS SP-97 A350 LF2 Outlet Fittings Provider for All Your Needs
SSM has significant product advantages in manufacturing MSS SP-97 A350 LF2 Outlet Fittings. Whether it’s quality or price, we will meet your needs.
More Information about MSS SP-97 A350 LF2 Outlet Fittings
Key Technical Selection Criteria
Material Compatibility
- Header material must be A350 LF2 or compatible (e.g., A333 Gr.6)
- Prohibited: Mixing with standard carbon steel (e.g., A105) in cryogenic systems
Welding Requirements
- Filler Material: AWS E7018-G (certified for -46°C)
- Preheating: ≥10°C (required if ambient temperature <0°C)
- Interpass Temperature: ≤250°C
Corrosion Protection
- Marine Environments: Require epoxy coating or galvanization
- H₂S Service: Must comply with NACE MR0175
Comparison with Other Standards
| Parameter | A350 LF2 | A105 | A182 F304 |
| Min. Temp. | -46°C | -29°C | -196°C |
| Sulfide Resistance | Moderate (requires NACE certification) | Poor | Excellent (requires 304L for low carbon) |
| Cost | 20-30% higher than A105 | Baseline | 3-5× higher than LF2 |
FAQ
- No! LF2 is only rated for -46°C and above. Use austenitic stainless steel (e.g., A182 F316L) for lower temperatures.
SP-97 are forged with integral reinforcement, while SP-75 are cast or non-reinforced with lower pressure ratings.
Generally no, but localized annealing is recommended if weld heat input exceeds 250°C.
MSS SP-97 A350 LF2 Outlet Fittings are critical components for low-temperature, high-pressure systems, especially in LNG and Arctic oil/gas projects. Their core value lies in the combination of material toughness and structural reliability. Selection must rigorously evaluate operating temperatures, media corrosivity, and welding procedures—consult specialized engineers for design collaboration.
For dimension tables or technical drawings, contact suppliers for detailed documentation!
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