DN350 WCB/CF8 Cast Butt Welded T-Type Strainer Filter with Butt Welded Ends

Product Attribute: Port Size: DN50 – DN600
Structure: T-Type
Application: Petroleum, Chemical, Power, Municipal
Power: Manual (Maintenance – flange opening)
Customized Support: Material, Mesh, Pressure Adaptation
Temperature of Media: ≤600℃ (By Material)
Media: Oil, Water, Acid – Alkali, Seawater
Filter Material: 304/316L Stainless Steel
Product Name: T-Type Butt-Welded Strainer
Type: Butt-Welded Strainer
Design Standard: ASME B16.9, ASME B16.5
Performance Norm: Leakage ≤0.3mL/min (DN100, 1.5×PN Test)
Body Material: WCB/CF8 (ASTM A216/A351)
Filtration Efficiency: ≥98% (100 – mesh, ≥0.15mm Particles)

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Specification

I. Core Parameters & Materials

1. Materials

Body: WCB (ASTM A216, tensile strength ≥ 485MPa, for normal fluids like water/oil) or CF8 (ASTM A351, Cr 18 – 20%, Ni 8 – 11%, resists pH 2 – 12 acids/alkalis, ≤ 425℃).
Filter: 304/316L stainless steel (ASTM A479). 304 (tensile ≥ 520MPa, ≤ 600℃); 316L (2 – 3% Mo, resists chloride, good for marine/high – salt). Mesh: 10 (2mm) to 200 (0.074mm) for diverse impurity interception.

2. Connections & Pressure

Connection: Butt – welded (ASME B16.9), bevel 30 – 37°, root face 1.6±0.8mm. DN50 – 600, low fluid resistance (local coefficient ≤ 1.5).
Pressure: PN10 – 100 (Class 150 – 600). Verified by 1.5× hydro and 1.1× pneumatic tests. Works under rated pressure (e.g., PN16 ≤ 1.6MPa).

II. Structural Design Logic

1. T – Flow Channel Hydraulics

T – structure makes fluid turn 90°, using “inertial separation + filter interception”. CFD – controlled inlet velocity ≤ 2.5m/s (water) ensures impurity deposition, no filter damage. 20 – 30% higher efficiency than straight – through.

2. Quick – Release & Sealing

Top flange (ASME B16.5) with TG/RF seals. Gaskets: flexible graphite (≤ 450℃) or metal – wound (≤ 600℃). O – ring (fluororubber/nitrile) secondary seal. Filter pulls out via bolts, 50% faster maintenance.

Product Overview

III. Manufacturing & Quality

1. Casting & Processing

Body: WCB via resin sand casting (1500 – 1550℃, ≥ 30min hold, porosity ≤ Grade 2). CF8 via investment casting (mold ± 0.05mm, Ra ≤ 12.5μm).
Filter: Laser – cut (± 0.02mm), CNC – woven (uniformity ≤ 5%), stamped. Argon – arc welded to 304 framework (3 – 5mm thick), weld strength ≥ 80% of filter.

2. Welding & Testing

Butt – welds use TIG (100 – 200A, 2 – 5mm/s, reinforcement ≤ 2mm). RT (NB/T 47013.2 – 2015 Grade Ⅱ) & PT check. Hydro – tested (1.5× PN, 30min, DN100 leakage ≤ 0.3mL/min).

Valve Details

IV. Performance Advantages

1. Filtration & Protection

100 – mesh filter (DN300, PN16) intercepts ≥ 98% of ≥ 0.15mm particles. Protects pumps (30 – 50% longer life), valves (± 1% accuracy), exchangers (15 – 20% higher efficiency).

2. Durability

CF8 + 316L: 30% H₂SO₄, 80℃, 1MPa, 1000h run, corrosion ≤ 0.03mm/year. WCB in fresh water: ≤ 0.1mm/year. 5 – 8 years replacement – free.

3. Energy – Saving

Lower pressure loss than gate valves (e.g., DN200, 1000m³/h, ≤ 0.05MPa loss). Cuts pump energy by 3 – 5%.

Application

V. Industry Applications

1. Petrochemical

Refining: 80 – mesh 316L filters coke/catalyst (≥ 0.2mm) for hydrocracking pumps (≥ 500kW). PTA: CF8 handles 120℃ acetic acid, 99.9% product purity.

2. Power

Thermal: WCB + 40 – mesh 304 filters turbine condensate (turbidity ≤ 5NTU). Nuclear: CF8 + 10 – mesh 316L resists seawater (Cl⁻ 18000 – 22000mg/L), 2 – 3% higher thermal efficiency.

3. Municipal & Industrial Water

Water plants: WCB + 20 – mesh 304 filters sediment/algae (≥ 1mm) for pumps. Steel: CF8 + 50 – mesh 316L filters iron oxide (≥ 0.5mm), reduces downtime.