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Help CenterASTM A53 Gr.B Carbon Steel Seamless Pipe, 3/4 Inch, Sch 80, Black Coated, Threaded Ends
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Hemaokang Steel (Shandong) Co., Ltd. is proud to offer the ASTM A53 Gr.B Carbon Steel Seamless Pipe, 3/4 Inch, Sch 80, Black Coated, Threaded Ends — a robust solution for demanding piping systems. As a supplier with annual export value exceeding US$50 million and a dedicated team of 51–100 professionals, we ensure every pipe meets rigorous quality standards. This product combines seamless construction, heavy-duty schedule 80 wall thickness, and corrosion-resistant black coating, making it ideal for high-pressure fluid conveyance in industries worldwide.
Our seamless pipes are manufactured using advanced processes to guarantee uniform strength and integrity. The 3/4-inch nominal size with threaded ends simplifies installation, reducing labor costs and leak risks. Backed by ISO9001 certification, this pipe delivers reliable performance across diverse applications — from steam lines to structural supports.
Key Features & Technical Specifications
- Seamless Construction — No welded seams mean higher pressure tolerance and reduced failure points.
- Schedule 80 Wall Thickness — Provides extra durability for high-pressure and high-temperature environments.
- Black Coated Finish — Offers protection against atmospheric corrosion and extends service life in exposed installations.
- Threaded Ends (NPT standard) — Enables fast, secure connections without welding, ideal for temporary or maintenance-prone systems.
- ASTM A53 Gr.B Compliance — Meets strict chemical and mechanical properties required for pressure piping and structural use.
- ISO9001 Certified Quality — Each batch undergoes stringent inspection to ensure dimensional accuracy and defect-free surfaces.
Detailed Specifications Table
| Parameter | Value |
| Product Name | ASTM A53 Gr.B Carbon Steel Seamless Pipe |
| Nominal Size | 3/4 inch (DN20) |
| Schedule | Sch 80 |
| Wall Thickness | 3.91 mm (0.154 in) |
| Outer Diameter | 26.67 mm (1.050 in) |
| Yield Strength (min) | 240 MPa (35,000 psi) |
| Tensile Strength (min) | 415 MPa (60,000 psi) |
| End Connection | Threaded (NPT) |
| Surface Coating | Black Paint or Varnish |
| Length | Random 5.8–12 m (customizable) |
Advantages & Customer Benefits
- Enhanced Safety — Seamless Sch 80 pipe withstands higher operating pressures (up to 3,000 psi depending on conditions) compared to standard schedule 40, reducing burst risk.
- Time & Cost Savings — Threaded ends eliminate need for welding equipment and skilled labor, allowing faster assembly on site.
- Long Service Life — Black coating provides a protective barrier against rust and mild chemicals, especially in indoor or sheltered environments.
- Versatile Applications — Suitable for steam, water, gas, and oil lines, as well as structural bracing and fence posts.
- Global Compliance — Meets ASTM A53 requirements recognized across North America, Europe, Asia, and beyond.
Why Choose Hemaokang Steel?
With an annual export value between US$50 million and US$100 million, Hemaokang Steel has built a reputation for reliable supply and consistent quality. Our 51–100 employees work in a modern facility in Liaocheng, Shandong — the steel pipe capital of China. Every product is backed by ISO9001 certification, and our team offers flexible customization (length, threading, additional coating options). We serve markets across North America, South America, Europe, Africa, and Asia, ensuring fast shipping and responsive after-sales support.
Choose ASTM A53 Gr.B Seamless Pipe, 3/4" Sch 80 Black Threaded for your next project — a product that combines proven standards with practical convenience. Contact our sales team for a quote, technical datasheet, or sample inspection. We are ready to support your success.
FAQ
Q1: What is the difference between this ASTM A53 Gr.B seamless pipe and welded pipe?
A: Seamless pipe is made from a solid billet without any longitudinal weld, providing uniform strength and better pressure resistance. Welded pipe has a seam that may be weaker under high stress. For critical high-pressure systems, seamless is preferred.
Q2: Can this pipe be used for steam applications?
A: Yes. The Sch 80 wall thickness and ASTM A53 Gr.B material make it suitable for saturated steam up to approximately 300 psi (depending on temperature). Always verify local codes for specific limits.
Q3: Are the threads NPT or BSPT?
A: Standard threading is NPT (National Pipe Taper) per ASTM requirements. Custom threading (BSPT or others) is available upon request.
Q4: Is the black coating food-grade or suitable for potable water?
A: The standard black coating is a rust-inhibitive paint, not certified for potable water. For drinking water systems, a galvanized or epoxy-lined option is recommended. Please inquire about customization.
Q5: What lengths are available?
A: We typically supply random lengths between 5.8 and 12 meters. Fixed lengths (e.g., 6m or 20ft) can be provided at your request. Minimum order quantities may apply.
Q6: How do you ensure the pipes are defect-free?
A: Every pipe undergoes hydrostatic testing, dimensional inspection, and visual check at our factory. ISO9001 quality management system ensures traceability and consistent control.
Q7: Can I get a sample before placing a bulk order?
A: Yes. Contact us to arrange a sample (cost and shipping may apply). We also accept third-party inspection during production.
Q8: What is the typical lead time for this product?
A: For standard sizes and lengths, lead time is approximately 15–30 days depending on order volume. Custom lengths or special coatings may require additional time. Please contact our sales team for exact scheduling.
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