PN100 2205 Check Valve

 Material: 2205 Duplex Stainless Steel

• Standard: UNS S32205, EN 1.4462, ASTM A182 F51 / A351 CD4MCU
• Composition: Cr 22%, Ni 5%, Mo 3%, N 0.14–0.20% — dual‑phase microstructure (50% austenite + 50% ferrite)
• Core Advantages:

  High Strength: Yield strength ≥ 450 MPa — 2× stronger than 316L → thinner wall, compact design, safe for PN100 high pressure

  Superior Corrosion Resistance: PREN ≈ 35–38 — far better pitting & crevice resistance than 316L/317L; excellent in chlorides, seawater, brine, brackish water, H₂S/sour service, dilute acids

  Stress Corrosion Cracking (SCC) Resistance: Highly resistant to chloride & sulfide SCC — main reason for choosing over 316L

  Intervallo di temperatura: ‑50°C ~ +300°C; avoid >320°C (risk of embrittlement)

• Limit: Not suitable for strong reducing acids (pure HCl, dilute H₂SO₄ <70°C) or concentrated oxidizing media; avoid <‑50°C (low‑toughness risk)

 Full Specifications

Basic Data

• Model:
  • H41W‑100 2205: Lift‑type check valve (flanged, vertical/horizontal)
  • H44W‑100 2205: Swing‑type check valve
  • H42W‑100 2205: Axial flow / Piston / Spring‑loaded check valve (best for high pressure PN100)
  • H45W: Y‑type check valve
• Pressure Rating: PN100 (100 bar / 10.0 MPa) — heavy‑duty high‑pressure class
• Size: DN15 – DN300 (½″ – 12″); PN100 available up to DN200 as standard
• Standard di progettazione:
  • DIN 3356, EN 12516, API 6D, ASME B16.34, GB/T 12236
  • Face‑to‑Face: DIN 3202, ASME B16.10
  • Flange: DIN 2543–2545, EN 1092‑1, ASME B16.5 (PN100 = thick‑wall, high‑strength flanges, RTJ/RF face)
• Test Standard: API 598, EN 12266‑1, ISO 5208
  • Shell test: 150 bar; Seat test: 110 bar; Leakage Rate A (zero leakage)

Standard Material BOM

Key Advantages for PN100 Service

1. High Pressure + Corrosion Resistance Combined:
   • PN100 requires very high material strength — 2205 delivers this while resisting corrosion that carbon steel or 316L cannot handle
   • Perfect for high‑pressure pipelines with chlorides, brine, or sour gas
2. Compact & Lightweight:
   • Higher strength means thinner wall thickness vs 316L/904L → smaller footprint, easier installation, lower weight
3. Fast & Reliable Non‑Return:
   • Spring‑loaded / axial‑flow design preferred for PN100: closes instantly, minimizes water hammer
   • Bidirectional sealing capability; zero reverse leakage
4. Cost‑Performance Leader:
   • ~60–80% more expensive than 316L, but 1/2 to 1/3 the cost of 2507 / C4 / Titanium
   • Best balance of strength, corrosion resistance, and price for high‑pressure chloride service

 Recommended Valve Type for PN100

• Axial Flow / Piston / Spring‑Loaded (H42W) — TOP CHOICE:
  • Compact, short face‑to‑face, suitable for any installation position
  • Spring‑assisted closing → very low pressure drop, fast response, minimal water hammer
  • Best for high pressure, high velocity, gas/liquid mixed service
• Lift‑Type (H41W): Good, but higher pressure drop; best for horizontal lines
• Swing‑Type (H44W): Not ideal for PN100 — bulky, slow closing, heavy, high torque; use only for large DN low‑velocity

Comparison: 2205 vs 316L / 904L / 2507 / TA2 (PN100 Rating)

Rule:

High pressure (≥ PN63) + chloride / seawater / sour gas → 2205 is default selection; upgrade to 2507 only if chloride > 10,000 ppm or extreme corrosion

Installation & Operation Rules

1. Flow Direction: Arrow marked on body — install strictly in flow direction
2. Orientation:
   • Spring‑loaded / Axial: Any orientation (horizontal/vertical)
   • Swing‑type: Install only horizontal, pin axis horizontal
3. Galvanic Isolation: 2205 is noble alloy. Do NOT connect directly to carbon steel. Use insulating gaskets or 2205 spool pieces.
4. Welding: Use filler ER2205 / 1.4462; controlled heat input (10–25 kJ/cm); interpass temp < 150°C; NO post‑weld heat treatment needed
5. Temperature: ≤ 300°C continuous; above this, strength drops and embrittlement risk increases
6. Avoid: Media containing hydrofluoric acid, pure hydrochloric acid, or strong reducing acids

 FAQ: PN100 2205 Check Valve

A: 316L yield strength is only 170 MPa — to reach PN100 it would need extremely thick walls (heavy, expensive, still low corrosion resistance). 2205 = 2× strength + far better corrosion → perfect match for PN100.

A: In most cases YES. 2205 covers 80% of duplex applications at ~55% cost of 2507. Upgrade to 2507 only if: chloride > 15,000 ppm, high‑temperature brine, or extreme sour service.

A: Standard: DN15 – DN200. DN250–DN300 PN100 is custom forged, available but higher cost.

A: In high‑pressure seawater/brine: 10–15 years; 3–4× longer than 316L.