1″-2500LB LF2 Y Pattern Strainer
Description
TECHNICAL DATA SHEET
Product Name: 1-inch 2500LB LF2 Low Temperature Carbon Steel Y Pattern Strainer
Model/Specification: 1″-2500LB-LF2-Y-STRAINER
Product Type: Y Type Strainer (Forged)
Connection Type: Threaded (NPT) / Socket Weld (SW) / Butt Weld (BW) User specified
1. Basic Design Parameters
| Parameter | Standard/Specification |
|---|---|
| Size | 1 inch (DN25) |
| Pressure Class | Class 2500 LB (PN420 / 6000 PSI) |
| Body Material | Low Temperature Carbon Steel – ASTM A350 LF2 Class 1 |
| Manufacturing Process | Forged Steel (Close Die Forged) |
| Design Standard | BS 5352 / MSS SP-118 / ASME B16.34 |
| End Connection Standard | ASME B1.20.1 (NPT) / ASME B16.11 (SW) / ASME B16.25 (BW) |
| Face to Face Standard | Manufacturer Standard / MSS SP-118 |
| Test & Inspection Std. | API 598 |
| Screen / Basket Design | Perforated or Mesh type, removable for cleaning |
2. Technical Specifications
| Parameter | Details |
|---|---|
| Strainer Type | Y Pattern, Forged Steel Construction |
| Bonnet Type | Bolted Bonnet / Screwed Bonnet (with gasket seal) |
| Service Temperature | -46°C to +400°C (LF2 low temperature carbon steel) |
| Applicable Media | Low temperature services, Cryogenic media, Natural Gas, LPG, LNG, Propane, Ethylene, Cold services, Steam, Oil, Water |
| Filtration Element | Removable Stainless Steel Screen (SS304/SS316) |
| Screen Mesh / Perforation | Standard: 20 mesh (0.84 mm) / Optional: 40, 60, 80, 100 mesh or perforated |
| Installation Position | Horizontal or Vertical (downward flow) |
| Pressure Direction | Bidirectional (flow arrow indicates direction) |
3. Material of Construction (LF2 Low Temperature Carbon Steel)
| Part Name | Material | Standard/Grade |
|---|---|---|
| Body | Low Temperature Carbon Steel – LF2 | ASTM A350 LF2 Class 1 |
| Bonnet / Cover | Low Temperature Carbon Steel – LF2 | ASTM A350 LF2 Class 1 |
| Screen / Filter Element | Stainless Steel | SS304 / SS316 |
| Gasket | Stainless Steel + Flexible Graphite | SS + Graphite (low temperature suitable) |
| Bonnet Bolts / Studs | Low Temperature Alloy Steel | ASTM A320 L7 (for low temp service) |
| Bonnet Nuts | Low Temperature Alloy Steel | ASTM A194 Gr.4 / Gr.7 |
| Drain / Blowdown Plug | Stainless Steel / LF2 | Optional (if specified) |
| Nameplate | Stainless Steel / Aluminum | With rivets |
*Note: LF2 material is specially heat treated for low temperature impact properties down to -46°C.*
4. Main Dimensions & Connection Details
Note: Dimensions are for 1″ Forged Y Strainer Class 2500. Values are based on industry standards and may vary by manufacturer.
4.1 End-to-End Dimensions (Face-to-Face)
| Size | Pressure Class | Connection Type | L (mm) | L (in) | H (mm) | H (in) | Weight (kg) | Weight (lbs) |
|---|---|---|---|---|---|---|---|---|
| 1″ | 2500LB | NPT / SW / BW | ~140-170 | ~5.5-6.7 | ~100-130 | ~3.9-5.1 | ~5-8 | ~11-18 |
*Note: For comparison, 1″ Class 1500 strainers have L=111mm, H=100mm . Class 2500 will have heavier wall thickness and larger dimensions.*
4.2 End Preparation Details (Per ASME Standards)
| Connection Type | Standard | Details |
|---|---|---|
| Threaded (NPT) | ASME B1.20.1 | Tapered pipe threads, 1″ NPT Female |
| Socket Weld (SW) | ASME B16.11 | Socket depth per standard, bore to match pipe schedule |
| Butt Weld (BW) | ASME B16.25 | Bevel: 37.5°, Root face: 1.6 mm |
4.3 Screen Details
| Parameter | Standard Value |
|---|---|
| Screen Material | SS304 / SS316 |
| Mesh Size (Standard) | 20 mesh (0.84 mm openings) |
| Perforation Size | 0.8 mm – 1.6 mm (optional) |
| Open Area Ratio | > 50% of pipe cross-section |
| Screen Removal | Removable through bonnet opening |
5. Pressure-Temperature Rating (ASME B16.34 / Class 2500)
*Material Group: Low Temperature Carbon Steel – ASTM A350 LF2*
| Temperature (°C) | Working Pressure (bar) | Working Pressure (psi) | Notes |
|---|---|---|---|
| -46 to -29 | 420 | 6090 | Low temperature range (impact tested) |
| -29 to 38 | 420 | 6090 | Maximum Rating (Class 2500) |
| 50 | 420 | 6090 | |
| 100 | 395 | 5730 | |
| 150 | 375 | 5440 | |
| 200 | 360 | 5220 | |
| 250 | 340 | 4930 | |
| 300 | 320 | 4640 | |
| 350 | 305 | 4425 | |
| 400 | 285 | 4135 | Max for LF2 |
*Note: LF2 maintains excellent impact properties down to -46°C, making it ideal for low temperature and cryogenic services.*
6. Test Pressure (API 598)
| Test Type | Medium | Pressure (bar) | Pressure (psi) | Acceptance Criteria |
|---|---|---|---|---|
| Shell Test (Hydrostatic) | Water | 630 | 9135 | 1.5 x 38°C Rating (no visible leakage) |
| Seat / Screen Test | Air / N2 | 5.5 – 7.0 | 80 – 100 | Per API 598 |
| Gasket Seal Test | Air / N2 | 5.5 | 80 | No visible leakage |
| Low Temperature Impact Test | N/A | N/A | N/A | Charpy V-Notch test per ASTM A370 at -46°C |
7. Flow Characteristics & Pressure Drop
| Parameter | Value |
|---|---|
| Flow Coefficient Cv (approx) | ~10 – 14 (typical for 1″ Y strainer) |
| Pressure Drop | Minimal when clean (typically < 0.2 bar at rated flow) |
| Screen Open Area | 2-3 times pipe cross-sectional area |
| Recommended Flow Velocity | Water: < 2.5 m/s, Steam: < 25 m/s, Gas: < 30 m/s |
8. Features & Applications
-
Key Features:
-
Low Temperature Service Capability (-46°C): ASTM A350 LF2 material is specially heat treated and impact tested for reliable performance in low temperature environments down to -46°C .
-
High Pressure Rating (2500LB): Designed for extreme high-pressure applications up to 420 bar (6000 PSI) .
-
Forged Body: Forged construction ensures superior strength, grain structure integrity, and freedom from porosity, critical for high-pressure Class 2500 applications .
-
Y Pattern Design: Compact Y-shaped body minimizes pressure drop while providing effective debris removal .
-
Removable Stainless Steel Screen: Easy maintenance – screen can be removed for cleaning without removing the strainer from the pipeline .
-
Low Temperature Bolting: ASTM A320 L7 bolting ensures proper strength and impact properties at low temperatures .
-
Multiple End Options: Available in NPT threaded, socket weld, or butt weld connections to suit various piping specifications .
-
Equipment Protection: Protects downstream equipment such as control valves, pumps, and flow meters from damaging debris .
-
Versatile Installation: Can be installed in horizontal or vertical (downward flow) pipelines .
-
Customizable Filtration: Standard 20 mesh screen with optional finer meshes (40, 60, 80, 100) or perforated screens available based on application requirements .
-
-
Main Applications:
-
LNG & Cryogenic Plants: Low temperature natural gas handling, liquefaction, and storage facilities .
-
LPG / Propane Services: Storage and transfer of liquefied petroleum gases .
-
Ethylene & Ethane Processing: Low temperature hydrocarbon processing .
-
Cold Climate Installations: Pipelines and facilities in arctic or cold regions .
-
Refrigeration Systems: Industrial refrigeration and cold storage .
-
Petrochemical Plants: Low temperature process streams .
-
Gas Processing Plants: Natural gas treatment and conditioning .
-
Upstream of Critical Equipment: Installed before control valves, flow meters, and pumps in low temperature services .
-
9. LF2 Material Properties
| Property | Value |
|---|---|
| Minimum Design Temperature | -46°C (-50°F) |
| Tensile Strength (min) | 485-655 MPa |
| Yield Strength (min) | 250 MPa |
| Elongation (min) | 22% |
| Charpy V-Notch Impact Test | Required at -46°C |
| Carbon Content (max) | 0.30% |
| Manganese Content | 0.60-1.35% |
*Disclaimer: The above data is prepared based on common industry standards (BS 5352, MSS SP-118, ASME B16.34) for forged low temperature carbon steel Y strainers . Specific dimensions, materials, and pressure ratings may vary by manufacturer. LF2 material is specially suited for low temperature service down to -46°C with impact testing per ASTM A370. The final technical agreement and certified drawings shall prevail.*
