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Help Center316L Perforated Well Screen, 0.5mm Hole, 4" Schedule 40, for Dewatering Applications
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Anping County Boli Hardware Wiremesh Products Factory, established in 1998, is a professional manufacturer specializing in wire mesh and perforated metal products. With annual export value of US$5 million to US$10 million, we serve clients across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our 316L Perforated Well Screen, featuring 0.5mm holes and 4" Schedule 40 pipe, is designed specifically for dewatering applications where reliable filtration and corrosion resistance are critical. Built with precision and durability, this product offers exceptional performance in demanding environments.
Key Features and Benefits
- 316L Stainless Steel Construction – Provides excellent resistance to chlorides, acids, and harsh groundwater conditions, ensuring long service life in dewatering wells.
- 0.5mm Precision Holes – Fine perforations effectively filter out fine sand and silt while allowing high water flow, reducing clogging and maintenance.
- 4" Schedule 40 Pipe – Standard heavy-duty wall thickness offers high structural strength to withstand soil pressure and installation stresses.
- Uniform Hole Pattern – Manufactured with advanced CNC punching equipment for consistent hole size and spacing, maximizing open area and flow efficiency.
- Customizable Length and Connections – Available in lengths up to 20 feet per section, with threaded, welded, or plain end options to suit various well designs.
- Optional Surface Treatments – Pickling, passivation, or electropolishing can be applied to enhance corrosion resistance and surface cleanliness.
Technical Specifications
| Material | 316L Stainless Steel (UNS S31603) |
| Pipe Size | 4 inch NPS (Nominal Pipe Size), Schedule 40 |
| Outside Diameter | 4.500 inches (114.3 mm) |
| Wall Thickness | 0.237 inches (6.02 mm) |
| Hole Diameter | 0.5 mm (0.0197 inches) |
| Open Area | Approximately 15% – 25% (depending on pattern) |
| Standard Length | 10 ft, 20 ft, or custom lengths |
| Connection Type | Threaded (NPT/BSP), welded, or plain end |
| Application | Dewatering wells, water supply wells, filter screens |
Detailed Product Description
Our 316L Perforated Well Screen is engineered for dewatering projects where groundwater control is essential. The combination of 316L stainless steel and 0.5mm holes provides an optimal balance between filtration precision and hydraulic conductivity. The Schedule 40 wall thickness ensures the screen can withstand the loads encountered during installation and operation in deep or unstable soils.
The perforations are produced using high-precision tooling, resulting in burr-free, smooth edges that reduce particle entrapment and facilitate easy cleaning. Each screen section is inspected for hole uniformity and dimensional accuracy before shipment. The open area can be customized based on the specific hole pattern (staggered, straight, or custom) to meet your flow requirements.
For dewatering applications, the screen is typically installed in a gravel pack or directly in the aquifer. The 0.5mm slot size is suitable for fine to medium sand formations, effectively preventing sand pumping while allowing efficient water extraction. The 316L grade offers superior resistance to crevice corrosion and stress corrosion cracking, especially in chloride-rich environments common in coastal or industrial dewatering sites.
Why Choose Anping Boli?
- Over 25 years of manufacturing experience in wire mesh and perforated products.
- Strict quality control from raw material to finished product – each batch is sampled and tested.
- Flexible customization: length, end connections, hole pattern, and surface finish.
- Competitive pricing with direct factory supply – no middlemen.
- Reliable delivery from major Chinese ports (Tianjin, Qingdao, Shanghai, etc.) to worldwide destinations.
- Experienced export team with multilingual support.
Trust and Credibility
Since 1998, Anping County Boli Hardware Wiremesh Products Factory has been a trusted supplier to global markets including North America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our annual export value of US$5 million to US$10 million reflects the confidence our customers place in our products. We are committed to providing high-quality well screens that meet the highest standards of performance and durability. Contact us today for a quote or technical consultation on your dewatering project.
Frequently Asked Questions (FAQ)
-
Why choose 316L stainless steel for dewatering screens?
316L offers superior corrosion resistance compared to 304, especially in chloride-bearing groundwater. Its low carbon content minimizes carbide precipitation during welding, maintaining corrosion resistance in heat-affected zones. -
What is the advantage of 0.5mm hole size?
0.5mm holes effectively filter fine sand and silt while providing good water flow. This reduces the need for extensive gravel packing and minimizes well clogging over time. -
Can the screen be customized to specific lengths?
Yes, we offer custom lengths from 1 ft to 20 ft per section, and can also provide flush-joint connections for continuous screens. -
How is the screen installed?
Installation methods include threaded coupling, welding, or using a slip joint. We recommend using a centralizer to ensure even gravel pack distribution around the screen. -
What is the maximum working pressure?
The Schedule 40 pipe has a working pressure rating of approximately 1,200 psi at room temperature for 316L stainless steel, but actual pressure should be verified based on API or ASTM standards. -
What is the difference between a perforated screen and a wire-wrapped screen?
Perforated screens are made by punching holes directly into a pipe, offering a cost-effective solution with good strength. Wire-wrapped screens provide a continuous slot and higher open area but are typically more expensive. -
Do you provide samples for testing?
Yes, we can supply small samples (e.g., 1 ft length) after confirming the specification. Sample fees may apply but are refundable for bulk orders. -
What is the lead time for bulk orders?
Typical lead time is 15–25 working days depending on quantity and customization. Express delivery is available upon request.
Contact us today to discuss your dewatering screen requirements. Our team is ready to provide technical support and competitive pricing.
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