Sambungan Pipa MSS SP 83 A182 F51
MSS SP-83 A182 F51 Pipe Unions are pipeline quick-connect couplings compliant with the MSS SP-83 standard, manufactured from ASTM A182 F51 duplex stainless steel. Designed for highly corrosive, high-chloride environments and high-strength applications, they are widely used in offshore engineering, chemical processing, and oil & gas industries.
High Quality MSS SP 83 A182 F51 Pipe Unions
- Peringkat Tekanan: Kelas 3000 (~750 psi) dan 6000 (~1500 psi)
- Kisaran Ukuran: biasanya NPS 1/8″ hingga 4″
- Jenis: Las soket (SW), Berulir (NPT)
Fitur Utama
- Chloride Resistance: Outperforms F316/F304 in seawater and acidic environments.
- High Strength: Reduces fitting wall thickness, lowering system weight (ideal for offshore platforms).
- Stress Corrosion Cracking (SCC) Resistance: Excellent performance in chloride and H₂S-containing environments.
Material Specifications (ASTM A182 F51)
ASTM A182 F51 (UNS S31803):
Duplex stainless steel (austenitic-ferritic microstructure) with 22% chromium, 5% nickel, 3% molybdenum, and 0.15% nitrogen.
Properti Utama:
- High strength: Tensile strength ~620 MPa, superior to standard austenitic stainless steels (e.g., F316).
- Corrosion resistance: Excellent resistance to chloride stress corrosion cracking (SCC), ideal for seawater and acidic oil/gas environments.
- Temperature range: -50°C to +300°C (long-term), with short-term tolerance up to +350°C.
Structure & Types
Desain Tiga Bagian:
- Terdiri dari dua ujung las soket atau ulir (jantan/betina) dan mur tengah untuk perakitan/pembongkaran cepat.
- Penyegelan: Kontak logam-ke-logam (tanpa paking), mengandalkan pemesinan presisi untuk kinerja antibocor.
Jenis Koneksi:
- Sambungan Berulir: Gunakan ulir NPT untuk sambungan pipa.
- Sambungan Las Soket: Dilas ke pipa untuk aplikasi tekanan tinggi.
Peringkat Tekanan:
- Kelas 3000 (~750 psi) dan Kelas 6000 (~1500 psi). Nilai tekanan-suhu ditetapkan dalam tabel standar.
Aplikasi Umum
- Offshore Engineering: Seawater cooling systems, subsea pipelines, ship ballast tanks.
- Oil & Gas: Sour gas fields (H₂S/CO₂), high-pressure water injection lines.
- Chemical Industry: Chloride-laden media (e.g., brine, hydrochloric acid).
- Desalination Plants: High-pressure pump connections in reverse osmosis (RO) systems.
One-Stop MSS SP 83 A182 F51 Pipe Unions Provider for All Your Needs
SSM has significant product advantages in manufacturing MSS SP 83 A182 F51 Pipe Unions. Whether it’s quality or price, we will meet your needs.
More Information about MSS SP 83 A182 F51 Pipe Unions
MSS SP-83 A182 F51 Pipe Unions are ideal for offshore, oil/gas, and high-chloride environments, balancing strength and corrosion resistance. Selection must consider fluid composition, temperature, and welding procedures for long-term reliability. For extreme conditions, upgrade to super duplex (F53/F55).
Pedoman Seleksi
Persyaratan Pengelasan:
- Use matching filler metals (e.g., ER2209) and control heat input (0.5-2.5 kJ/mm) to avoid σ-phase precipitation.
- Post-weld solution annealing (1050-1100°C water quench) recommended to restore duplex structure.
Menghindari:
- Long-term operation >300°C (may reduce toughness).
- Strong reducing acids (e.g., hydrofluoric acid); switch to Hastelloy.
Instalasi:
- For threaded connections, use anti-galling compounds (e.g., nickel-based lubricant) to prevent stainless steel thread galling.
Perbandingan dengan Material Lain
| Milik | F51 (Dupleks) | F316 (Austenitik) | A350 LF2 (Baja Suhu Rendah) |
| Struktur Mikro | Austenitic-Ferritic Duplex | Fully Austenitic | Baja Karbon Paduan Nikel |
| Chloride SCC Resistance | Luar biasa | Sedang | Miskin |
| Kekuatan Tarik (MPa) | 620 | 515 | 485 |
| Biaya | Higher (30-50% more than F316) | Sedang | Rendah |
Tanya Jawab Umum
F53 (UNS S32750) and F55 (UNS S32760) are “super duplex” grades with higher chromium (25%) and molybdenum (4%), PREN >40, suited for harsher conditions (e.g., hot concentrated brine) but at higher cost.
Not recommended—urea can cause selective corrosion; use high-molybdenum austenitic steels (e.g., F316L mod) instead.
Typically solution-annealed, hardness ≤290 HB.
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