ASTM B366 Monel 400 Reducing Tee Pipe Fitting UNS N04400 Nickel Copper Alloy for Marine, Chemical Processing and Offshore Oil & Gas Systems
ASTM B366 Monel 400 Reducing Tee Pipe Fittings
Monel 400 reducing tee pipe fittings are manufactured from UNS N04400 nickel copper alloy according to ASTM B366 standards. They offer excellent resistance to seawater, acids, alkalis and corrosion, providing reliable solutions for pipe size transition and flow distribution in marine, chemical processing, offshore oil & gas and industrial piping systems.
Key Features
- Excellent resistance to seawater, acids, alkalis and chloride corrosion.
- High strength with excellent toughness and impact resistance.
- Outstanding performance in marine and offshore environments.
- Excellent weldability and reliable connection performance.
- Designed for smooth pipe size transition and efficient flow distribution.
- Suitable for harsh conditions in chemical processing, oil & gas and industrial piping systems.
- Long service life with reduced maintenance requirements.
Typical Applications
- Used in ships, offshore platforms and seawater systems with excellent seawater corrosion resistance.
- Applied in offshore platforms, oil & gas pipelines and corrosive environments.
- Used for corrosive media transportation in chemical processing systems.
- Suitable for desalination and high-salinity water treatment systems.
- Used in refining, energy and industrial process piping systems.
- Applied in heat exchangers and cooling systems under demanding conditions.
- Used for pipe size transition and flow distribution in industrial piping.
Chemical Composition (wt%)
| Element | Ni | Cu | Fe | Mn | C | Si | S |
|---|---|---|---|---|---|---|---|
| Range | ≥63.0 | 28.0–34.0 | ≤2.50 | ≤2.0 | ≤0.30 | ≤0.50 | ≤0.024 |
Mechanical Properties (Solution Annealed Condition)
| Property | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 480 MPa (70 ksi) |
| Yield Strength (Rp0.2) | ≥ 170 MPa (25 ksi) |
| Elongation (A5) | ≥ 35 % |
| Density | 8.80 g/cm³ |
| Hardness | ≤150 HB |
| Max Service Temperature | 480°C - 550°C (900°F - 1020°F) |
| Modulus of Elasticity | 179 GPa |
Precautions
- Keep continuous service temperature below 480℃ to prevent strength degradation.
- Use suitable nickel alloy welding materials and control heat input during welding.
- Avoid contamination from iron particles or carbon steel tools to maintain corrosion resistance.
- Check pipe dimensions and connection requirements before installation.
- Select proper service media and avoid unsuitable strong oxidizing environments.
- Perform regular inspection and necessary NDT to ensure long-term safe operation.
Quality Assurance
All DINGSCO Monel 400 reducing tees undergo strict inspections, including PT (ASTM E165), tensile testing (ASTM E8), OES chemical analysis, hardness testing (ASTM E18), ultrasonic testing and dimensional inspection. Full traceability is maintained throughout the production process from raw material to finished tees. MTRs, heat certificates and NDT reports are available upon request.
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