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Welcome to Hemaokang Steel (Shandong) Co., Ltd., a reliable supplier of high-quality steel products. Our Q235B ERW Black Carbon Steel Pipe 2 Inch Nominal Diameter is specifically designed for construction applications, combining strength, durability, and cost-effectiveness. With our ISO9001-certified manufacturing process and a dedicated team of 51–100 employees, we ensure every pipe meets rigorous international standards.
This pipe is manufactured using electric resistance welding (ERW) technology, which guarantees consistent wall thickness and smooth surfaces. The black carbon steel material (Q235B) offers excellent weldability and impact resistance, making it ideal for structural supports, scaffolding, fencing, and fluid transportation in building projects. Below we detail the key features and technical specifications.
Product Features & Benefits
- High Strength-to-Weight Ratio: Q235B steel provides reliable load-bearing capacity without unnecessary weight, reducing transportation and installation costs.
- ERW Precision Welding: The electric resistance welding process eliminates weak points, ensuring uniform mechanical properties along the entire pipe length.
- Black Surface Finish: The natural black oxide coating offers basic corrosion resistance during storage and transit; optional painting or oiling available upon request.
- Standard Dimensions: 2 inch nominal diameter (DN50) with a wide range of wall thicknesses (SCH40, SCH80, etc.) to suit different pressure and load requirements.
- Ease of Fabrication: Compatible with cutting, threading, welding, and bending, allowing flexible on-site modifications.
- Cost-Effective: Compared to seamless or stainless steel pipes, ERW carbon steel offers a balance of performance and economy for large-scale construction.
Technical Specifications
| Parameter | Value |
|---|---|
| Material Grade | Q235B (equivalent to A53 Grade B) |
| Nominal Diameter | 2 inch (DN50) |
| Outer Diameter | 60.3 mm (2.375 inch) |
| Wall Thickness Options | 3.2 mm – 12.7 mm (SCH40, SCH80, XS, XXS) |
| Length | 6 m, 12 m, or customized |
| Tensile Strength | ≥ 390 MPa |
| Yield Strength | ≥ 235 MPa |
| Elongation | ≥ 26% |
| End Finish | Plain end, beveled, or threaded with coupling |
| Surface Treatment | Black as-rolled, black painting, or oiled |
| Certification | ISO9001:2015 |
The Q235B steel grade ensures reliable performance in general construction environments, including temporary structures, handrails, and water/gas pipelines. Our ERW pipes undergo strict hydrostatic testing and visual inspection to guarantee leak-free joints and dimensional accuracy.
Trust & Reliability
Hemaokang Steel (Shandong) Co., Ltd. was established in 2025 with a strong focus on export quality. Our annual export value ranges from US$50 million to US$100 million, serving markets across North America, South America, Europe, Africa, Southeast Asia, and Oceania. With 51–100 skilled employees and ISO9001 certification, we maintain consistent production standards and timely delivery.
We offer flexible packaging options, including bundling, hexagon strapping, or container loading, and can provide third-party inspection reports upon request. Our experienced sales team is ready to assist with technical questions and custom orders.
Contact us today for a competitive quote on Q235B ERW black carbon steel pipes. Whether you need small quantities for a single project or bulk shipments for large infrastructure, trust Hemaokang Steel for quality and value.
Frequently Asked Questions
-
1. What is the difference between ERW and seamless pipes?
ERW pipes are formed by welding a rolled steel strip, while seamless pipes are extruded from a solid billet. ERW is more cost-effective and suitable for low-to-medium pressure applications, while seamless offers higher strength and uniformity for high-pressure use. -
2. Can these pipes be used for water supply?
Yes, the Q235B ERW black pipe can be used for water and gas transportation, provided the wall thickness matches the required pressure rating. However, for drinking water, an internal lining may be needed to prevent corrosion – please consult our technical team. -
3. What is the typical delivery time?
For standard sizes and quantities, delivery is usually within 15–25 days after order confirmation. Customized orders may take longer depending on specifications. -
4. Do you offer galvanized versions?
We primarily supply black carbon steel pipes as described. Galvanized coating is available as a custom option – please specify your requirement when ordering. -
5. How do you ensure quality control?
Every batch is tested according to ISO9001 procedures, including tensile testing, flattening, hydrostatic pressure, and dimensional checks. We also provide Mill Test Certificates (MTC) with each shipment. -
6. What is the minimum order quantity (MOQ)?
Our MOQ for 2-inch ERW pipes is typically 1 ton, but we can accommodate smaller trial orders for new clients. -
7. Can I get a sample before placing a bulk order?
Yes, we offer free samples for quality evaluation. The buyer covers shipping costs, which will be deducted from the first bulk order. -
8. What payment terms are accepted?
We accept T/T, L/C at sight, and other negotiable terms. For first-time cooperation, 30% deposit and 70% balance against copy of shipping documents is common.
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