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Home > Industrial Equipment & Components > Filtration Equipment & Parts > Filter Bag & Cartridge > Hot Dipped Galvanized Seamless/Welded Steel Pipe GI Hollow Round Zinc Coated Perforated Tubes Construction

Hot Dipped Galvanized Seamless/Welded Steel Pipe GI Hollow Round Zinc Coated Perforated Tubes Construction

Hot Dipped Galvanized Seamless/Welded Steel Pipe GI Hollow Round Zinc Coated Perforated Tubes Construction thumbnail-3

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Hot Dipped Galvanized Seamless/Welded Steel Pipe GI Hollow Round Zinc Coated Perforated Tubes Construction thumbnail-5

Hot Dipped Galvanized Seamless/Welded Steel Pipe GI Hollow Round Zinc Coated Perforated Tubes Construction photo-1

Hot Dipped Galvanized Seamless/Welded Steel Pipe GI Hollow Round Zinc Coated Perforated Tubes Construction photo-2

Hot Dipped Galvanized Seamless/Welded Steel Pipe GI Hollow Round Zinc Coated Perforated Tubes Construction photo-3

Hot Dipped Galvanized Seamless/Welded Steel Pipe GI Hollow Round Zinc Coated Perforated Tubes Construction photo-4

Hot Dipped Galvanized Seamless/Welded Steel Pipe GI Hollow Round Zinc Coated Perforated Tubes Construction photo-5

Product Spotlights

Hot Dipped Galvanized Seamless/Welded Steel Pipe with customizable perforations, offering superior corrosion resistance, dimensional accuracy, and cost-effective solutions for construction, fencing, and industrial applications. Trusted manufacturer since 1998, exporting globally with flexible shipping options.

Negotiable MOQ: 1 Piece (Price negotiable depending on order volume and customization)

Key Specifications

Get Latest Price

Material:

Other, Steel (Q195/Q235/Q345)

Type:

Other, Seamless / Welded (ERW)

Surface Treatment:

Hot Dipped Galvanized (Zinc Coated)

Contact Supplier Request Quote Chat Now

Anping County Boli Hardware Wiremesh Products Factory

2Yrs

Payment & Shipping

Payment Methods:

Port of Shipment:

tianjin shanghai qingdao

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Material Other, Steel (Q195/Q235/Q345)

Type Other, Seamless / Welded (ERW)

Surface Treatment Hot Dipped Galvanized (Zinc Coated)

Shape Round Hollow

Wall Thickness 0.8mm - 12mm (customizable)

Outer Diameter 20mm - 219mm (customizable)

Length 1m - 12m or as required

Perforation Available (round, square, slotted holes)

Application Construction, Fencing, Greenhouse, Scaffolding

End Finish Plain, Beveled, Threaded (optional)

As a trusted manufacturer since 1998, Anping County Boli Hardware Wiremesh Products Factory proudly presents our Hot Dipped Galvanized Seamless/Welded Steel Pipe – a versatile, durable solution for construction and infrastructure projects worldwide. Our GI hollow round zinc-coated tubes are engineered to offer superior corrosion resistance, structural integrity, and long service life, meeting the demands of diverse applications from fencing to industrial piping. With an annual export value of US$5 million to US$10 million and shipping ports including Tianjin, Qingdao, and Shanghai, we ensure reliable supply chains for global clients.

Key Features & Technical Specifications

Superior Corrosion Protection: Hot-dipped galvanized coating (zinc layer thickness 40-200 μm) provides excellent resistance against rust, moisture, and harsh environmental conditions, ideal for outdoor and underground use.
Versatile Manufacturing Options: Available in both seamless (for high-pressure applications) and welded (ERW) types, offering flexibility in strength and cost. Perforated tubes can be customized with round, square, or slotted holes for filtration, ventilation, or decorative purposes.
Strict Dimensional Accuracy: Outer diameter from 20mm to 219mm, wall thickness from 0.8mm to 12mm, length up to 12m – all produced with tight tolerances (OD ±0.5%, WT ±8%) to ensure compatibility with standard fittings.
Excellent Mechanical Properties: Yield strength ≥ 235 MPa (for Q235), tensile strength ≥ 375 MPa, ensuring reliable performance under load. The galvanized coating also provides abrasion resistance during handling and installation.
Customizable Perforations: We can manufacture tubes with specific hole patterns (diameter, pitch, arrangement) to meet your project needs – ideal for fence panels, handrails, guardrails, grain drying, and acoustic barriers.

Parameter	Standard Range	Notes
Outer Diameter	20 – 219 mm	Custom sizes available
Wall Thickness	0.8 – 12 mm	Seamless: up to 12mm; Welded: up to 8mm
Length	1 – 12 m	Random or fixed lengths
Zinc Coating Weight	200 – 600 g/m²	ASTM A123 equivalent
Perforation Hole Diameter	3 – 20 mm	Custom patterns
End Finish	Plain, Beveled, Threaded	Optional

Benefits for Your Projects

Cost-Effective: Welded steel pipes offer economical solutions with good strength, while seamless pipes provide high reliability for demanding applications. The hot-dipped galvanized coating eliminates the need for additional painting or maintenance, reducing lifecycle costs.
Easy to Fabricate: Our pipes can be cut, welded, drilled, and threaded with ease, allowing quick installation on site. Perforated tubes simplify assembly in fencing, railing, and ventilation systems.
Global Compatibility: Manufactured to international standards (ASTM, BS, EN, JIS, etc. – upon request), our pipes are widely accepted in North America, Europe, Southeast Asia, Africa, Oceania, and the Middle East.
Custom Solutions: We offer tailored sizes, coatings, and perforation patterns to match your specific blueprints. Our experienced team provides technical support for product selection.

Company Trust & Reliability

With over 20 years of manufacturing experience, Anping County Boli Hardware Wiremesh Products Factory has established a strong presence in the global market. Our factory is located in Hengshui, Hebei, China – a hub for steel processing. We export to more than 10 market regions including North America, South America, Eastern Europe, and Southeast Asia, with annual export value exceeding US$5 million. Our port options (Tianjin, Qingdao, Shanghai, Foshan) ensure flexible logistics. We are committed to on-time delivery, stringent quality control, and competitive pricing. Contact us today for a quote or sample – experience the Boli difference in your next construction project.

Frequently Asked Questions (FAQ)

What is the difference between seamless and welded steel pipes?
Seamless pipes are manufactured without a seam, offering higher pressure resistance and uniformity, ideal for critical applications. Welded pipes are made by forming and welding steel strips, providing a cost-effective option with good strength for general construction.
Can you provide perforated tubes with specific hole patterns?
Yes, we can customize perforation patterns including round holes, square holes, slotted holes, and staggered arrangements. Please provide your hole diameter, pitch, and pattern layout.
What is the typical zinc coating thickness?
Our hot-dipped galvanized coating normally ranges from 40 μm to 120 μm per side, equivalent to 200-600 g/m². Heavier coatings are available for extreme environments.
Do you offer international shipping and what are your ports?
We ship from Tianjin, Qingdao, Shanghai, and Foshan ports. We handle FOB, CIF, and other terms. Our logistics team ensures safe and timely delivery worldwide.
Are these pipes suitable for underground water or gas lines?
Seamless hot-dipped galvanized pipes are suitable for water and gas lines under moderate pressure. For high-pressure applications, we recommend seamless pipes with proper wall thickness. Always consult with your engineer for specific requirements.
Can I get small sample quantities for testing?
Yes, we provide samples (usually 1-2 pieces) upon request. The sample cost is negotiable and can be refunded with bulk orders.
What is your minimum order quantity (MOQ)?
MOQ depends on specifications. For standard sizes, MOQ is typically 5 tons. For custom dimensions or perforations, MOQ may be higher. Contact us for details.
How do you ensure product quality?
We have a strict quality control system: raw material inspection, in-process checks, final inspection including dimensional, coating thickness, and hydrostatic testing (for seamless pipes). We can also provide third-party inspection if required.