14" Stainless Steel 321 Wedge Wire Wrapped Johnson Screen Tube for Chemical Filtration
Product Description:
Our 14-inch stainless steel 321 wedge wire wrapped Johnson screen tube is a precision-engineered filtration component designed specifically for chemical processing and petrochemical applications. Manufactured by Anping County Xinlu Wire Mesh Products Co., Ltd., this continuous-slot screen tube combines a V-shaped profile wire with longitudinal support rods through resistance welding, delivering exceptional filtration accuracy, structural integrity, and resistance to aggressive chemical environments.
Features:
Why 321 Stainless Steel for Chemical Filtration?
321 stainless steel (UNS S32100) is a titanium-stabilized austenitic alloy specifically developed to resist intergranular corrosion at elevated temperatures. In chemical processing environments where temperatures frequently exceed 500°C (932°F), 321 stainless steel outperforms standard 304 and 316 grades by:
Resisting intergranular corrosion in the 800°F–1500°F temperature range
Maintaining structural integrity under thermal cycling conditions
Providing superior resistance to organic acids, alkalis, and chloride-containing solutions
Extending service life in catalytic cracking units, heat exchangers, and reactor internals
For chemical engineers specifying filtration components, 321 stainless steel offers the optimal balance of corrosion resistance, high-temperature performance, and cost efficiency compared to higher-nickel alloys.
Technical Parameters:
| Parameter |
Specification |
| Material |
Stainless Steel 321 (Titanium-stabilized) |
| Nominal Size |
14" (355.6mm) |
| Support Rods |
Φ2.5–6mm |
| Wrapped Wire |
0.75×1.8mm (11S), 1×2mm (12S), 1.5×2mm, 1.5×2.5mm (18S/#63), 2×3mm, 2.2×3.5mm (#93), 2.2×4.5 (28SB), 2.5×4mm, 3×4.6mm (#118), 3.3×6.2mm (#130) |
| Slot Size |
0.1mm – 10mm (customizable) |
| End Connection |
Threaded NPT/BSP/NPS, Flange, Welded Rings, Plain, Plain Beveled |
| Surface Treatment |
Electrolytic Polishing / Pickling / Polished / Sand Blasting / Coating |
| Collapse Pressure |
300 PSI |
| Operating Pressure |
200 PSI |
| Weight |
8–40 kg/m² |
| Length |
2.95m, 10ft, 5.85m, up to 20ft or customized |
| Certification |
FORM E, AFTA, CO |
Chemical Industry Applications
This 321 stainless steel Johnson screen tube is engineered for the most demanding chemical filtration environments:
Petrochemical Refining: Catalyst retention in fixed-bed reactors, scrubber internals, hydrotreater screen baskets
Chemical Processing: Acid and alkali liquid filtration, solvent recovery, polymer production, catalyst recovery
Fertilizer & Agrochemicals: Urea prilling, ammonia synthesis loop filtration, phosphate processing
Pharmaceutical & Fine Chemicals: API crystallization, high-purity solvent filtration, bioreactor retention screens
Environmental & Wastewater: Chemical wastewater pre-treatment, ion exchange resin retention, activated carbon filter support
Manufacturing & Quality Control
Each 321 stainless steel wedge wire screen tube is manufactured through a fully automated production line: V-wire profiling, helical wrapping, resistance welding, slot calibration to ±0.005mm tolerance, surface treatment, and final inspection with dimensional verification, pressure testing, and material certification.
Packaging & Delivery
Packaging: Plastic film wrapped, metal strapped bundles, wooden crates or pallets
Delivery Time: 7–10 business days after payment
Supply Ability: 500 pcs/month
MOQ: 10 pcs
Price Range: 30–120 USD/m (according to specification)
Payment Terms: T/T
FAQ
Q: What is the difference between 321 and 304/316 stainless steel screen tubes for chemical applications?
A: 321 stainless steel contains titanium as a stabilizing element, which effectively resists intergranular corrosion at elevated temperatures (800°F–1500°F), while 304 and 316 may experience sensitization in this temperature range. For high-temperature chemical processes such as catalytic cracking and hydrotreating, 321 is the more reliable choice.
Q: What is the minimum slot size available?
A: The standard minimum slot size is 0.05mm and can be customized based on specific filtration accuracy requirements. The wedge wire structure ensures slot tolerance of ±0.005mm.
Q: Can end connections be customized according to drawings?
A: Yes. We support NPT, BSP, NPS threaded connections, flange connections, welded rings, plain ends, and beveled ends, all customizable according to customer drawings.
Q: Which chemicals is this product suitable for?
A: 321 stainless steel screen tubes are suitable for filtration and separation of organic acids, alkalis, alcohols, chloride solutions, and various other chemical media. For highly corrosive media (such as high-concentration hydrochloric acid), higher-grade alloy materials are recommended.
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