Super Duplex Stainless Steel Y Type Strainer A890-5A F53 - ANSI Class 150, 1/2 inch to 36 inch
Tengs Valve supplies high-quality Super Duplex Stainless Steel Y Type Strainers in A890-5A (F53 / UNS S32750 / 2507) for ANSI Class 150Lb service, with A890-4A (F51 / UNS S31803 / 2205) as an alternative duplex option. Manufactured with bolted cover design and available with flanged RF or Butt Weld (BW) ends to ASME B16.5 / B16.25. Sizes range from 1/2 inch to 36 inch (DN15 to DN900). Screens are supplied in SS316, SS316L, duplex 2205 and super duplex 2507, with mesh sizes from 10 to 400 mesh. The super duplex body offers high resistance to chloride pitting, crevice corrosion and stress corrosion cracking, making it ideal for seawater, desalination, offshore platform, sour gas and chemical service.
Super Duplex Y Type Strainer Specifications
• Strainer Type: Y Type, Y Pattern
• Sizes: 1/2 inch to 36 inch (DN15 to DN900)
• Pressure Rating: ANSI Class 150Lb
• Suitable Medium: Water, gas, oil, steam, seawater, sour gas etc.
• Body Material: Super Duplex Stainless Steel A890-5A (F53 / 2507); Duplex Stainless Steel A890-4A (F51 / 2205) alternative
• Strainer Screen: Stainless Steel (SS316, SS316L); Duplex Stainless Steel (2205, 2507)
• Mesh Size: 10, 20, 40, 60, 100, 200, 400 mesh etc.
• End Connection: Butt Weld (BW), Flanged RF (Raised Face)
• Cover Type: Bolted Cover (B.C.)
• Design and Manufacture: ASME B16.34
• Inspection and Test: API 598
• End Flange Dimension: ASME B16.5, ASME B16.47 A
• BW End Dimension: ASME B16.25
• Face to Face / End to End: ASME B16.10
✓ A890-5A / F53 super duplex Y strainer provides the highest chloride and sour resistance for seawater, desalination and offshore platform service
Y Type Strainer Standards
1. Design and Manufacture: ASME B16.34
2. Inspection and Test: API 598
3. End Flange Dimension: ASME B16.5, ASME B16.47 A
4. BW End Dimension: ASME B16.25
5. Face to Face and End to End: ASME B16.10
6. Pressure-Temperature Ratings: ASME B16.34
Y Type Strainer Structure Drawing
Main Parts and Material List For Super Duplex Y Type Strainer
| No. | Part Name | Carbon Steel | Stainless Steel | Duplex / Super Duplex |
|---|---|---|---|---|
| 01 | Body | A216 WCB | A351 CF8, CF3, CF8M, CF3M | A890 4A, A890 5A (F51 / F53) |
| 02 | Screen | SS304, SS304L, SS316, SS316L | SS304, SS304L, SS316, SS316L | SS316 / 2205, SS316 / 2507 |
| 03 | Gasket | Graphite, Graphite + Stainless Steel (304 / 304L / 316 / 316L), EPDM, PTFE | ||
| 04 | Cover Nut | A194 2H | A194 8, A194 8M | A194 8M |
| 05 | Cover Bolt | A193 B7 | A193 B8, A193 B8M | A193 B8M |
| 06 | Cover | A105 | A182 F304, F304L, F316, F316L | A182 F51, A182 F53 |
| 07 | Drain Plug | A193 B7 | A193 B8, A193 B8M | A193 B8M |
Reference: ASME B16.34, API 598, ASTM A890, ASTM A995. For super duplex A890-5A body, cover uses A182-F53 forged super duplex, bolts and nuts use B8M / 8M stainless steel, gasket uses graphite + stainless steel or PTFE. Materials may vary by model and pressure rating. Contact us for confirmed material certificate to EN 10204 3.1.
Super Duplex Y Strainer Pressure Rating: CL150 vs CL300 vs CL600
| Pressure Rating | Design Pressure (bar) | Design Pressure (psi) | Typical Application |
|---|---|---|---|
| ANSI CL150 | 19.6 | 285 | Seawater intake, desalination, offshore platform utility lines, sour gas low-pressure service |
| ANSI CL300 | 51 | 740 | Offshore process piping, sour gas medium-pressure service |
| ANSI CL600 | 102 | 1,480 | High-pressure sour gas, offshore subsea and chemical service |
Reference: ASME B16.34. Class 150 is the standard rating for seawater intake, desalination and low-pressure offshore service; Class 300 and 600 are available for higher pressure offshore and sour gas application.
Duplex 4A vs Super Duplex 5A Material Selection
| Property | A890-4A (F51 / 2205) | A890-5A (F53 / 2507) |
|---|---|---|
| UNS Number | UNS S31803 / S32205 | UNS S32750 |
| EN Material Number | 1.4462 | 1.4410 |
| PREN (Pitting Resistance Equivalent Number) | ≥ 34 | ≥ 40 |
| Chloride Pitting Resistance | Good | Excellent |
| Sour Gas (H2S) Resistance | Moderate | High |
| Typical Application | Seawater, desalination, general offshore service | Seawater injection, sour gas, subsea, offshore platform high-chloride service |
Reference: ASTM A890, ASTM A995, NORSOK M-630, EN 10213. A890-5A (F53 / 2507) offers higher PREN (≥ 40) than A890-4A (F51 / 2205, PREN ≥ 34), providing superior resistance to chloride pitting and sour gas (H2S) corrosion.
Super Duplex Y Strainer Screen Selection
| Screen Material | Mesh Range | Key Characteristic | Typical Application |
|---|---|---|---|
| SS316 / SS316L | 10 - 400 mesh | General corrosion resistance, economical | Water, oil, steam, non-chloride service |
| Duplex 2205 | 10 - 400 mesh | High chloride resistance, PREN ≥ 34 | Seawater, desalination, general offshore service |
| Super Duplex 2507 | 10 - 400 mesh | Highest chloride and sour resistance, PREN ≥ 40 | Seawater injection, sour gas, subsea, offshore high-chloride service |
Reference: ASTM A240, ASTM A789. For super duplex 5A body, super duplex 2507 or duplex 2205 screen is recommended to match the corrosion resistance of the body.
Main Connection Dimensions
Super Duplex Y Strainer Dimensions ANSI Class 150LB
| NPS | DN | L (RF) | L (BW) | B | D | G | f | K | Z-Ød | C | A |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 15 | 108 | - | 13 | 89 | 35.1 | 1.6 | 60.3 | 4-15.9 | 9.7 | - |
| 3/4 | 20 | 117 | - | 19 | 99 | 42.9 | 1.6 | 69.9 | 4-15.9 | 10.4 | - |
| 1 | 25 | 127 | 127 | 25 | 108 | 50.8 | 1.6 | 79.3 | 4-15.9 | 11.2 | 35 |
| 1 1/4 | 32 | 140 | 140 | 32 | 117 | 63.5 | 1.6 | 88.9 | 4-15.9 | 12.7 | 45 |
| 1 1/2 | 40 | 165 | 165 | 38 | 127 | 73.2 | 1.6 | 98.6 | 4-15.9 | 14.2 | 52 |
| 2 | 50 | 203 | 203 | 49 | 152 | 91.9 | 1.6 | 120.7 | 4-19.1 | 15.8 | 63 |
| 2 1/2 | 65 | 216 | 216 | 62 | 178 | 104.6 | 1.6 | 139.7 | 4-19.1 | 17.5 | 75 |
| 3 | 80 | 241 | 241 | 74 | 191 | 127 | 1.6 | 152.4 | 4-19.1 | 19.1 | 91 |
| 4 | 100 | 292 | 292 | 100 | 229 | 157.2 | 1.6 | 190.5 | 8-19.1 | 23.9 | 117 |
| 6 | 150 | 406 | 356 | 150 | 279 | 215.9 | 1.6 | 241.3 | 8-22.2 | 25.4 | 172 |
| 8 | 200 | 495 | 495 | 201 | 343 | 269.7 | 1.6 | 298.5 | 8-22.2 | 28.4 | 223 |
| 10 | 250 | 622 | 622 | 252 | 406 | 323.9 | 1.6 | 362 | 12-25.4 | 30.2 | 278 |
| 12 | 300 | 699 | 699 | 303 | 483 | 381 | 1.6 | 431.8 | 12-25.4 | 31.8 | 329 |
| 14 | 350 | 787 | 787 | 334 | 533 | 412.8 | 1.6 | 476.2 | 12-28.6 | 35.1 | 362 |
| 16 | 400 | 864 | 864 | 385 | 597 | 469.9 | 1.6 | 539.8 | 16-28.6 | 36.6 | 413 |
| 18 | 450 | 978 | 978 | 436 | 635 | 533.4 | 1.6 | 577.9 | 16-31.8 | 39.6 | 464 |
| 20 | 500 | 978 | 978 | 487 | 699 | 584.2 | 1.6 | 635 | 20-31.8 | 42.9 | 516 |
| 24 | 600 | 1295 | 1295 | 589 | 813 | 692.2 | 1.6 | 749.3 | 20-34.9 | 47.8 | 619 |
| 26 | 650 | 1295 | 1295 | 633 | 870 | 749.3 | 1.6 | 806.5 | 24-34.9 | 68.3 | 670 |
| 28 | 700 | 1448 | 1448 | 684 | 927 | 800.1 | 1.6 | 863.6 | 28-34.9 | 71.4 | 721 |
| 30 | 750 | 1524 | 1524 | 735 | 984 | 857.3 | 1.6 | 914.4 | 28-34.9 | 74.7 | 772 |
| 36 | 900 | 1965 | 1965 | 874 | 1168 | 1022.4 | 1.6 | 1085.9 | 32-41.3 | 90.4 | 927 |
Reference: ASME B16.5, ASME B16.10, ASME B16.47 A. Dimensions in mm. Contact us for confirmed drawing.
Super Duplex A890-5A Y Strainer Applications
• Seawater intake and injection: offshore platform seawater lift pumps, seawater injection and cooling water systems requiring high chloride resistance.
• Desalination: reverse osmosis (RO) intake, brine discharge and multi-stage flash (MSF) piping requiring super duplex body and screen.
• Offshore oil and gas: offshore platform process piping, subsea manifolds and sour gas service with A890-5A body and 2507 screen.
• Sour gas and acid service: H2S-containing natural gas and acid gas filtration requiring PREN ≥ 40 resistance.
• Chemical and petrochemical: chloride-containing corrosive media, chlorine dioxide and hypochlorite service with super duplex body.
• Pulp and paper bleach plant: chlorine dioxide, hypochlorite and aggressive bleach service requiring super duplex construction.
FAQ - Super Duplex Stainless Steel Y Type Strainer
Q1: What is super duplex stainless steel A890-5A / F53?
A: A890-5A is an ASTM cast super duplex stainless steel grade defined in ASTM A890 / A995. It corresponds to UNS S32750 wrought material (also called 2507) and is designated F53 in ASTM A182 for forged components. Super duplex 5A contains approximately 25% chromium, 7% nickel, 4% molybdenum and 0.3% nitrogen, giving it a PREN (Pitting Resistance Equivalent Number) of ≥ 40. This provides superior resistance to chloride pitting, crevice corrosion and stress corrosion cracking compared to standard duplex 2205 (A890-4A, PREN ≥ 34). It is equivalent to EN 1.4410 (X2CrNiMoN25-7-4) in European standard.
Q2: What is the difference between duplex 4A (2205) and super duplex 5A (2507)?
A: Duplex 4A (F51 / 2205, UNS S31803 / S32205) has a PREN of ≥ 34 and provides good resistance to chloride stress corrosion cracking, suitable for seawater, desalination and general offshore service. Super duplex 5A (F53 / 2507, UNS S32750) has a higher chromium, molybdenum and nitrogen content, giving a PREN of ≥ 40 and significantly better resistance to chloride pitting, crevice corrosion and sour gas (H2S). For seawater injection, subsea, sour gas and the most demanding offshore service, A890-5A is the recommended grade. For general seawater and desalination service, A890-4A is a more economical choice.
Q3: Why is super duplex used for seawater and offshore service?
A: Seawater contains high levels of chloride ions that cause pitting, crevice corrosion and stress corrosion cracking in standard stainless steels such as SS304 and SS316. Even duplex 2205 can be attacked in high-temperature seawater or chlorinated seawater. Super duplex 2507 (A890-5A) with PREN ≥ 40 offers excellent resistance to these corrosion mechanisms, making it the preferred material for seawater intake, seawater injection, desalination, subsea manifolds and offshore platform piping. Its high strength also allows thinner wall thickness and lighter weight, which is beneficial for offshore structures.
Q4: What pressure rating and size range are available for super duplex Y strainers?
A: Super duplex A890-5A Y strainers are available in ANSI Class 150 as standard, with Class 300 and 600 available on request. Sizes range from 1/2 inch to 36 inch (DN15 to DN900), which is the widest size range in the Y strainer series because Class 150 is used for large-diameter low-pressure offshore and seawater lines. End connections include Flanged RF to ASME B16.5 / B16.47 A and Butt Weld (BW) to ASME B16.25.
Q5: What screen material should be used with super duplex A890-5A body?
A: For super duplex A890-5A body, the screen should match the corrosion resistance of the body. Super duplex 2507 screen is recommended for seawater injection, sour gas and subsea service. Duplex 2205 screen is suitable for general seawater and desalination service. SS316 or SS316L screen can be specified for non-chloride or low-chloride service where the corrosion resistance of super duplex is not fully required for the screen. Combined screens (perforated plate + wire mesh) are available for high dirt load service.
Q6: How do I maintain a super duplex Y strainer?
A: Super duplex Y strainer maintenance is similar to other Y strainers: isolate the strainer, depressurize, remove the cover bolts (bolted cover design), take out the screen, clean or replace it, install a new gasket (graphite + stainless steel or PTFE), and reassemble. The Y-shaped body allows screen removal without disconnecting the pipeline. For continuous offshore or seawater injection operation, a bypass line or dual-strainer configuration is strongly recommended. After maintenance, pressure test is recommended before returning to service. Avoid using carbon steel wire brushes or tools that could contaminate the super duplex surface.
Request a Quote for Super Duplex Stainless Steel Y Type Strainer
Send us your size, pressure rating (CL150 / CL300 / CL600), body material (A890-5A or A890-4A), end connection (RF / BW), screen material (SS316 / 2205 / 2507), mesh size, and quantity. Our team will reply within 24 hours with price, drawing, and delivery time.
Email: sales@tengsvalve.com
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