High Pressure Simplex Basket Strainer Class 600LB - Large Size 2 inch to 36 inch, Davit Arm, A106 A516
Tengs Valve supplies high-quality High Pressure Simplex Basket Strainers in ANSI Class 600LB with welded / fabricated body construction. Sizes range from 2 inch to 36 inch (DN50 to DN900) for large size service, with bolted cover design and Davit Arm for heavy cover lifting. Body is fabricated from carbon steel A106 / A516 / WPB, with A105N forged flange and blind flange cover. End connections include flanged RF or RTJ to ASME B16.5 (under 24 inch) or ASME B16.47 A/B (above 24 inch). Screens and baskets are supplied in 304SS, 316/316L, duplex 2205 and super duplex 2507, as perforated plate (2mm to 10mm hole) or wire mesh (10-100 mesh). Drain connection is WN flange with blind flange; Support Legs are provided for large size. Designed and manufactured to ASME SEC VIII DIV.1 and ASME B16.34, ideal for high-pressure refinery, power plant, chemical and high-pressure process piping service.
High Pressure Simplex Basket Strainer Specification
• Strainer: CL600LB Fabricated Simplex Basket Strainer
• Sizes: 2 inch to 36 inch (DN50 to DN900), Large Sizes
• Pressure Rating: High Pressure Class 600LB
• Suitable Medium: Water, gas, oil, steam etc.
• Strainer Material:
• Body: Carbon Steel WPB, A106, A516
• Flange: Carbon Steel, A105N
• Cover: Blind Flange A105N
• Screen and Basket:
• Material: Stainless Steel (304, 316 / 316L, 2205, 2507)
• Perforated Hole Size: 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 9mm, 10mm etc.
• Wire Mesh:
• Material: SS304, SS316
• Mesh Size: 10, 20, 40, 60, 80, 100 mesh etc.
• End Connection: RF (Raised Face), RTJ (Ring Joint)
• Body Type: Welded / Fabricated
• Cover Type: Bolted Cover (B.C.)
• Drain Connection: WN Flange with Blind Flange
• Special Design: Davit Arm, Support Legs
✓ Class 600LB high pressure basket strainer combines large size up to 36 inch with Davit Arm cover lifting for refinery and power plant service
Basket Strainer Standards
1. Design and Manufacture: ASME SEC VIII DIV.1, ASME B16.34
2. Inspection and Test: API 598
3. End Flange Dimension: ASME B16.5 (under 24 inch), ASME B16.47 A/B (above 24 inch)
4. Face to Face and End to End: ASME B16.10
5. Pressure-Temperature Ratings: ASME B16.34
High Pressure Basket Strainer Pressure Rating: Class 300 vs 600 vs 900
| Pressure Class | Design Pressure (bar) | Design Pressure (psi) | Typical Application |
|---|---|---|---|
| ANSI Class 300 | 51 | 740 | General hydrocarbon, medium-pressure process piping |
| ANSI Class 600 | 102 | 1,480 | High-pressure process, refinery, power plant, high-pressure steam |
| ANSI Class 900 | 153 | 2,220 | Very high-pressure process, wellhead, gas injection |
Reference: ASME B16.34, ASME SEC VIII DIV.1. Class 600 is the standard high-pressure class for refinery, power plant and high-pressure process service. Class 300 is more economical for medium-pressure piping; Class 900 is selected for very high-pressure service.
Class 600LB Basket Strainer Body Material Selection
| Body Material | Standard | Key Characteristic | Typical Application |
|---|---|---|---|
| A516 Gr.70 | ASTM A516 | Pressure vessel carbon steel plate, high strength | Large diameter Class 600 high-pressure process, refinery, power plant |
| A106 Gr.B | ASTM A106 | Seamless carbon steel pipe, high temperature | High-temperature steam, boiler, power plant high-pressure piping |
| A234-WPB | ASTM A234 | Wrought carbon steel fitting, weldable | General high-pressure carbon steel process piping |
| A105N | ASTM A105 | Normalized forged carbon steel | Flange, cover, drain flange for Class 600 high-pressure service |
Reference: ASTM A516, A106, A234, A105. A516 Gr.70 is the standard pressure vessel steel plate for large diameter Class 600 basket strainer body; A106 Gr.B is the seamless pipe for high-temperature service; A105N is the normalized forged steel for flange and cover. A516 offers higher strength and better toughness than A234-WPB for high-pressure service.
Davit Arm and Support Legs Design Features
| Feature | Description | Benefit |
|---|---|---|
| Davit Arm | Swing arm mounted on the strainer body to lift the heavy cover | No crane or lifting equipment required during maintenance; safe handling of heavy A105N blind flange cover |
| Support Legs | Integral support legs welded to the strainer body | Distributes the weight of large diameter Class 600 basket strainer; prevents pipeline stress |
| WN Drain Flange | Weld Neck flange with Blind Flange on drain connection | Robust drain connection for high-pressure service; suitable for large diameter strainer |
Reference: ASME SEC VIII DIV.1, ASME B16.34. Davit Arm is strongly recommended for Class 600 large diameter basket strainers (above 12 inch) with heavy cover; Support Legs are provided for sizes above 24 inch to support the strainer weight and prevent pipeline stress.
Main Material List For Class 600LB Simplex Basket Strainer
| No. | Part Name | Carbon Steel | Stainless / Duplex |
|---|---|---|---|
| 01 | Body | Carbon Steel A106 / A516 | - |
| 02 | Screen | SS304 / SS316 / DSS | SS304 / SS316 / DSS |
| 03 | Gasket | Graphite or Graphite + Stainless Steel (304, 304L, 316, 316L) | |
| 04 | Cover | A105N (Blind Flange) | - |
| 05 | Cover Bolt | A193 B7 (M) | - |
| 06 | Cover Nut | A194 2H (M) | - |
| 07 | Drain Valve | A105 (WN Flange with Blind Flange) | - |
| 08 | Davit Arm | On Request | |
| 09 | Support Legs | On Request | |
Reference: ASME SEC VIII DIV.1, ASME B16.34, API 598, ASTM A516, A106, A234, A105. A516 Gr.70 and A106 Gr.B are the standard carbon steel body materials; A105N is the normalized forged steel for cover and flange. Davit Arm and Support Legs are provided on request for large size Class 600LB basket strainer. Contact us for confirmed material certificate to EN 10204 3.1.
Class 600LB High Pressure Basket Strainer Applications
• Oil refinery and petrochemical: high-pressure process lines, hydrotreating, hydrocracking and high-pressure reagent feed lines with Class 600 rating.
• Power plant high-pressure service: high-pressure steam mains, boiler feedwater, condensate and turbine protection lines with A106 high-temperature carbon steel body.
• High-pressure gas transmission: natural gas and process gas pipelines requiring RTJ ring joint sealing and Class 600 high-pressure rating.
• Large diameter main pipeline: DN600 to DN900 large diameter high-pressure main pipeline with Davit Arm cover and Support Legs.
• Chemical and high-pressure process: corrosive media filtration with 304SS / 316SS / 2205 basket screen in A516 carbon steel body.
• High-pressure water systems: boiler feedwater, descaling and hydraulic systems requiring Class 600 high-pressure filtration.
FAQ - High Pressure Simplex Basket Strainer Class 600LB
Q1: What is a Class 600LB High Pressure Basket Strainer?
A: A Class 600LB High Pressure Basket Strainer is a basket type pipeline filter with a fabricated (welded) carbon steel body rated to ANSI Class 600 (102 bar / 1,480 psi at ambient temperature). It is designed and manufactured to ASME SEC VIII DIV.1 and ASME B16.34 for high-pressure service. Sizes range from 2 inch to 36 inch (DN50 to DN900), with bolted cover and Davit Arm for heavy cover lifting. Body is A106 / A516 carbon steel with A105N forged flange and cover. It is the standard choice for high-pressure refinery, power plant and high-pressure process piping service.
Q2: What is the Davit Arm and why is it needed for Class 600LB basket strainer?
A: Davit Arm is a swing arm mounted on the strainer body to lift the heavy cover (A105N blind flange). For Class 600LB basket strainer above 12 inch, the cover weight increases significantly and cannot be lifted manually. With Davit Arm, one operator can swing the cover open without crane or lifting equipment, greatly reducing maintenance time and improving safety. Support Legs are also provided for sizes above 24 inch to support the weight of the strainer and prevent pipeline stress. This combination is standard practice for large diameter high-pressure basket strainer.
Q3: What is the difference between A516, A106 and A234-WPB for the body?
A: A516 Gr.70 is a pressure vessel carbon steel plate with high strength and good toughness, widely used for large diameter Class 600 basket strainer body and pressure vessel fabrication. A106 Gr.B is a seamless carbon steel pipe for high-temperature service, used for high-temperature steam, boiler and power plant piping. A234-WPB is a wrought carbon steel fitting material with excellent weldability, used for general carbon steel piping components. For Class 600 large diameter basket strainer, A516 Gr.70 is preferred for the cylindrical body because of its higher strength; A106 Gr.B is used for high-temperature service; A234-WPB is used for smaller sizes and general service.
Q4: What end connections are available for Class 600LB basket strainer?
A: Class 600LB basket strainer is available with Flanged RF (Raised Face) or RTJ (Ring Joint) ends to ASME B16.5 (size under 24 inch) or ASME B16.47 A/B (size above 24 inch). RTJ is preferred for high-pressure and high-temperature service, using a metal ring gasket for leak-tight sealing. RF is used for general high-pressure service with a spiral wound gasket. Drain connection is WN flange with blind flange for high-pressure service. Face-to-face dimension follows ASME B16.10. Cover type is bolted cover with Davit Arm for large sizes.
Q5: What screen and mesh sizes are available?
A: Screens are supplied in stainless steel 304SS, 316SS, 316LSS and duplex 2205 / 2507. Perforated plate hole sizes include 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 9mm and 10mm; wire mesh sizes include 10, 20, 40, 60, 80 and 100 mesh. For high-pressure refinery and power plant main lines, 4mm to 8mm perforated plate is common; for pump and instrument protection, 40 to 100 mesh wire mesh is specified. Combined screens (perforated plate + wire mesh) are available for high dirt load with fine filtration requirement. Perforated hole size and mesh size are tailor-made to customer requirements.
Q6: How do I maintain a Class 600LB high pressure basket strainer?
A: Maintenance requires strict procedure: isolate the strainer, depressurize completely, and confirm zero pressure. Use the Davit Arm to lift the heavy A105N blind flange cover. Remove the basket, clean or replace the screen and mesh, install a new gasket (graphite or graphite + stainless steel), and retorque bolts (A193 B7 / A194 2H) to specified torque value in a star pattern. The Support Legs support the strainer weight during maintenance. The WN drain flange with blind flange allows draining the strainer before cover removal. Screen replacement is recommended when the pressure drop exceeds the initial clean-screen value by 0.5-1.0 bar. After maintenance, pressure test is required before returning to service.
Request a Quote for Class 600LB High Pressure Basket Strainer
Send us your size (2 to 36 inch or DN50 to DN900), pressure rating (Class 600LB), body material (A516 / A106 / A234-WPB), end connection (RF / RTJ), screen material (304SS / 316SS / 2205 / 2507), perforated hole size (2-10mm) or mesh size (10-100), Davit Arm and Support Legs requirement, and quantity. Our team will reply within 24 hours with price, drawing, and delivery time.
Email: sales@tengsvalve.com
Website: Request a Quote Online
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