Core Advantage: Endorsed by Two Major International Standards, Meeting the Broadcast Industrial Application Needs

ERW (Electric Resistance Welded) pipe is manufactured by forming hot-rolled coils into shape and welding using high-frequency current. Our products simultaneously comply with ASTM A53 (General Piping Standard) and API 5L (Line Pipe Standard) Grade B requirements – the most widely used dual certification in the carbon steel welded pipe industry. From construction scaffolding to oil & gas transmission, from fire sprinkler systems to machinery manufacturing, this "dual-certified" welded pipe has become the preferred choice for engineering projects due to its stable quality and economic efficiency.

We provide more than just welded pipes; we offer universal solutions for your projects.

Why Choose ASTM A53 / API 5L Grade B ERW Welded Pipe?

1、Dual Certification, Multiple Applications

Meeting both ASTM A53 Grade B and API 5L Grade B requirements simultaneously means the same pipe can be used for general purposes like construction and fire protection (ASTM A53) as well as low-pressure oil & gas transmission lines (API 5L). One pipe, multiple applications, simplifying inventory management.

2、Flexible Wall Thickness, Choose as Needed

SCH40 (Standard Wall) : The most commonly used schedule, balancing strength and economy, widely applied in general piping and structural support.

3、SCH10 (Thin Wall) : Lighter weight, lower cost, suitable for low-pressure fluid transmission and non-load-bearing structures.

Additional schedules including SCH20, STD, SCH80 available, covering 0.8mm-22mm wall thickness range.

4、ERW Process, Efficient and Precise

Manufactured using High-Frequency Welding (HFW) technology, with 100% online ultrasonic inspection and eddy current testing ensuring reliable weld quality. Compared to seamless pipes, ERW welded pipes offer advantages of high dimensional accuracy, uniform wall thickness, and lower production costs.

5、Diverse Surface Finishes

Black Pipe: Coated with varnish or rust-proof oil, suitable for indoor piping, fire protection systems, gas transmission.

Galvanized Pipe: Hot-dip galvanized treatment for enhanced corrosion resistance, suitable for outdoor, humid environments, and water pipelines.

6、Reliable Mechanical Properties

Grade B material ensures stable mechanical performance: Tensile Strength ≥415 MPa, Yield Strength ≥240 MPa. Chemical composition strictly controlled with low carbon equivalent, offering good weldability and formability.

Key Application Areas

Construction & Structure: Scaffolding, steel structure supports, building fencing, greenhouses.

Fire Protection Systems: Automatic sprinkler systems, fire water pipelines (black pipe widely used for its heat resistance).

Oil & Gas: Low-pressure gathering lines, oilfield surface process piping.

Water Conservancy & Municipal: Water transmission pipelines, sewage discharge, cable conduits.

Machinery Manufacturing: Conveyor rollers, machinery frames, automotive chassis components.

General Piping: Compressed air lines, heating pipelines, ventilation ducts.

Technical Specifications

Why Choose Us?

Dual-Certified Material Assurance: Each batch of pipes comes with material test reports showing both ASTM A53 and API 5L certifications, fully traceable quality.

Multiple Schedules in Stock: Regular inventory of common schedules including SCH40 and SCH10, meeting urgent project requirements.

One-Stop Processing Services: Support for cut-to-length, beveling, threading, and galvanizing.

Extensive Application Experience: Products used in hundreds of construction, fire protection, and pipeline projects domestically and internationally – trusted quality.

Conclusion: From skyscraper steel structures to underground urban gas networks, ASTM A53 / API 5L Grade B ERW welded pipes support every corner of modern infrastructure with dual-certified reliable quality. Contact us today for your tailored welded pipe solution!

Note: When selecting ERW welded pipes, please confirm the following elements: OD × WT (e.g., 114.3×6.02mm SCH40), Material Grade (Grade B), Standards (ASTM A53/API 5L), Surface Finish (Black/Galvanized), and End Type. For sour service or low-temperature applications, please specify in your inquiry.