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Home > Metallurgy, Mineral & Energy > Steel & Products > Steel Pipe & Tube > 4 Inch Galvanized Steel Pipe Schedule 80 Threaded End Plumbing

4 Inch Galvanized Steel Pipe Schedule 80 Threaded End Plumbing

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Product Spotlights

Hot-dip galvanized Schedule 80 threaded pipe for high-pressure plumbing and industrial use. Precision NPT/BSPT threads ensure leak-proof connections. ISO9001 certified, customizable lengths, and global export capability. Durable, corrosion-resistant, and cost-effective solution for demanding projects.

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

Key Specifications

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Material:

Other, Galvanized Steel

Surface Treatment:

Other, Hot Dip Galvanized

Size:

4 inch (DN100)

Contact Supplier Request Quote Chat Now

Hemaokang Steel (Shandong) Co., Ltd.

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

Qingdao Port

Delivery Detail:

7 days

Product Details
Company Profile
Contact Us

Material Other, Galvanized Steel

Surface Treatment Other, Hot Dip Galvanized

Size 4 inch (DN100)

Wall Thickness Schedule 80 (Heavy duty)

End Type Threaded (NPT/BSPT)

Length 20 ft (customizable)

Application Plumbing, Industrial piping, Structural

Connection Threaded coupling

Standard Available upon request

Hemaokang Steel (Shandong) Co., Ltd. is proud to present our premium 4 Inch Galvanized Steel Pipe Schedule 80 Threaded End Plumbing. Manufactured with precision in our state-of-the-art facility in Liaocheng, Shandong, China, this pipe is designed to deliver exceptional durability and corrosion resistance for demanding plumbing and industrial applications. With a robust schedule 80 wall thickness and standardized threaded ends, our product ensures reliable performance, easy installation, and long service life. Backed by our ISO9001 certified quality management system, every pipe meets rigorous international standards, making it a trusted choice for professionals worldwide.

Our team of over 51 skilled employees, combined with an annual export value exceeding US$50 million, reflects our commitment to quality and customer satisfaction. Whether you need a single pipe or bulk orders for large-scale projects, we offer competitive pricing, flexible customization, and prompt delivery to markets across North America, South America, Europe, Asia, Africa, Oceania, and the Middle East. Below, we provide a detailed technical overview of this product to help you make an informed decision.

Key Features & Technical Specifications

Superior Corrosion Resistance: Hot-dip galvanized coating provides excellent protection against rust and environmental factors, ideal for outdoor and underground plumbing.
Heavy-Duty Schedule 80 Wall: Thicker wall compared to schedule 40, offering higher pressure rating and structural integrity for high-stress applications.
Precision Threaded Ends: Both ends are threaded with NPT (National Pipe Thread) or BSPT (British Standard Pipe Taper) as per your requirement, ensuring leak-proof connections.
Uniform Dimensions: Manufactured to strict tolerances, the 4-inch nominal diameter delivers consistent flow capacity and compatibility with standard fittings.
Versatile Application: Suitable for water supply, gas lines, oil pipelines, steam systems, structural supports, and fire protection systems.
Customizable Lengths: Standard length is 20 feet (6 meters), but we can cut to specific lengths upon request.
Easy Installation: Threaded ends allow quick assembly without welding, reducing labor time and cost.

Technical Parameters Table

Parameter	Value
Nominal Diameter	4 inches (DN100)
Schedule	80
Wall Thickness	0.337 inches (8.56 mm) approx.
Outside Diameter	4.500 inches (114.3 mm)
End Finish	Threaded (NPT/BSPT)
Material Grade	ASTM A53 Grade B / A106 (or equivalent)
Coating	Hot Dip Galvanized (Zinc coating 250-550 g/m²)
Standard Length	20 ft (6 m) ± 0.5 in
Pressure Rating	Up to 2,500 psi (depending on temperature)

Advantages for Your Business

Long-Term Cost Savings: The galvanized coating extends service life significantly, reducing replacement and maintenance costs.
High Safety Factor: Schedule 80 wall thickness provides a generous safety margin for high-pressure and high-temperature systems.
Global Compatibility: Threaded ends conform to NPT or BSPT standards, making them compatible with international fittings and valves.
Environmentally Friendly: Galvanized steel is 100% recyclable, supporting sustainable construction practices.
Bulk Supply Capability: As a leading exporter with annual export value of US$50-100 million, we can handle large volumes with consistent quality.

Why Choose Hemaokang Steel?

Since our establishment in 2025, Hemaokang Steel (Shandong) Co., Ltd. has rapidly grown into a trusted supplier in the global steel market. Our ISO9001 certification ensures that every product undergoes strict quality control from raw material inspection to final packaging. With a team of 51–100 dedicated professionals and a strong export network covering all major regions, we guarantee timely delivery and responsive after-sales support.

Our annual export value of US$50 million – US$100 million demonstrates the trust our global customers place in us. We serve clients in North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and beyond. Whether you are a distributor, contractor, or project manager, we offer customized solutions, competitive pricing, and flexible packaging options (bundled, hexagonal strapping, or in crates).

We invite you to experience the reliability of our 4 Inch Schedule 80 Galvanized Steel Pipe with Threaded Ends. Contact our sales team today for a quote, technical data sheet, or sample. Let Hemaokang Steel be your partner for success in plumbing and industrial projects.

Frequently Asked Questions (FAQ)

Q: What is the wall thickness of Schedule 80 for a 4-inch pipe?
A: For a 4-inch nominal diameter, Schedule 80 wall thickness is approximately 0.337 inches (8.56 mm). This provides a higher pressure rating than Schedule 40.
Q: Are the threaded ends compatible with standard fittings?
A: Yes, our threaded ends are manufactured to NPT (National Pipe Thread) or BSPT (British Standard Pipe Taper) specifications. Please let us know your preferred standard when ordering.
Q: Can this pipe be used for underground water lines?
A: Absolutely. The hot-dip galvanized coating offers excellent corrosion resistance, making it suitable for underground and outdoor plumbing applications. However, for highly corrosive soil, additional wrapping may be recommended.
Q: What is the maximum working pressure for this pipe?
A: The pressure rating depends on temperature and application. For Schedule 80 galvanized steel pipe at ambient temperature, it can typically handle up to 2,500 psi. For detailed derating factors, please request our technical data sheet.
Q: Do you offer custom lengths or cut-to-size service?
A: Yes, we can cut the pipe to any specified length (e.g., 10 ft, 15 ft) with a small cutting fee. Standard length is 20 ft. Threading can be applied on both ends as required.
Q: Is the pipe certified for potable water systems?
A: Our galvanized steel pipe is commonly used for non-potable water applications. For potable water, we recommend our interior epoxy-lined galvanized pipe or stainless steel options. Please consult with our team for specific requirements.
Q: What is your minimum order quantity (MOQ)?
A: For standard sizes, the MOQ is 10 tons. For smaller quantities, we may accommodate sample orders. Contact us for details.
Q: How do you ensure the quality of the galvanized coating?
A: We follow ISO9001 procedures and conduct regular tests including coating thickness measurement (magnetic method), uniformity (Preece test), and adhesion (hammer test). Our coating meets ASTM A123/A123M standards.