Leading ERW Steel Pipe Manufacturers In China Since 1998

TUSPIPE is a China ERW steel pipe manufacturer with a 500,000MT annual production capacity.

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STEEL PIPE suppliers

Welcome to TUSPIPE, where ERW Carbon Steel Pipes are crafted to perfection. Based in Tianjin, China, we are a renowned name with three production lines producing 50,000 tons of carbon steel tubes annually. Our reach? Global!

Our high-quality steel pipes, known for their versatility and adherence to various international standards, are used in over 70 countries. These standards include API 5CT, API 5L, JIS G3444, JIS G3452, ASTM A53/A53M, ASTM A135, ASTM A252, ASTM A500, ASTM A795, AS/NZS 1163, AS/NZS 1074, AS/NZS 1396, EN 10217, EN 10219, EN 10255, UL 852, FM 1630, and more.

Whether in oil and gas, construction, or solar energy, our steel pipes are the backbone of industries worldwide. TUSPIPE is more than a steel pipe manufacturer; we are your partners in progress.

Large Inventory

TUSPIPE holds around 20,000MT of black steel pipe and raw materials in stock, so we are able to make a fast delivery when you have an urgent request.

Professional Expertise

A team of 12 professional and experienced engineers working at TUSPIPE makes the production process more efficient and functional.

Rich Experience

Our factory was established in 1998, and we have accumulated rich experience in steel pipe production and engineering projects.

Easy to Communicate

You speak to the factory directly, so your question can be answered quickly with a more professional approach. Also, multilingual services are available.


Our ERW steel pipe are used in a wide range of industries, as you can see, whether it’s construction, oil and gas transport, or power and piling jobs.We only make quality ERW pipe to help you run your business better.

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erw pipe Uncoiler


erw pipe Accumulating


ERW PIPE-forming



High-Frequency Welding


Dual Heat Treatment


Air & Water Cooling




End Processing


Pipe Machining


Varnishing / Coating




Container Stuffing



Supplier Management

Tianjin United Steel Pipe Co., Ltd (TUSPIPE) carries out a strict audit on suppliers, checking their production qualification and capacity to ensure that the quality control procedures of raw materials meet the requirements. In addition, the company also evaluates the suppliers every year and evaluates the past quality control, document control, delivery time, and other information to ensure that the suppliers meet our product quality requirements.

carbon steel

Before Production

After receiving the hot-rolled coil of raw materials, the quality assurance department sends an inspector for visual inspection, to eliminate cracks, pits, and other defects on the surface of the coil to affect the subsequent production. In addition to visual inspection, the inspection personnel also takes samples from the coil plate for chemical composition analysis and mechanical experiment according to the standard requirements, and compare the inspection results with the data on the material quality certificate issued by the coil plate supplier. If the analysis results do not meet the requirements of the standard, the raw material will be returned to the supplier for replacement.

During Production

In order to ensure that our carbon steel pipes meet the standard requirements, the quality engineers, on-site inspection personnel and front-line production workers need to make great efforts. In the production process, we will carry out the following inspection and test on the steel pipe according to the standard requirements:

welded steel pipe

Tensile Test

That measures the force required to pull on a pipe.By analyzing these results, engineers can determine whether a material is suitable for its intended application.

Metallographic Test

Metallographic tests are one of the important means of experimental research on metal materials.

Charpy Impact Test

It is generally a test method to determine the safety, reliability, and effectiveness of the product when it is subjected to external impact or action.

Chemical Component Analysis

For spectral analysis, the emission spectrum or absorption spectrum can be used. This method has the advantage of being very sensitive and fast.

Drop-Weight Tear Test

This experiment is to use a drop hammer at a certain height to break the sample in the state of a supported beam and evaluate the relevant performance results.

Flattening Test

The flattening test is a test method used to test the deformation performance of a metal tube flattened to a specified size and to show its defects.

EN 10219

Coating, Marking, and Packaging

After the welded steel pipe production is completed, Tianjin United Steel Pipe Co., Ltd (TUSPIPE) performs the surface coating of the erw steel pipe according to the customer’s requirements, to prevent corrosion. Standard coated with black paint, varnish, and anti-rust oil, these materials can play a temporary anti-rust effect in the process of transportation. If FBE, PE, or PP coatings are needed, the pipes will be transported and finished in a coating mill.
Tianjin United Steel Pipe Co., Ltd (TUSPIPE) sticks a bar code on the inner wall of each steel pipe, and the bar code is unique on the pipe end. The bar code is equivalent to the ID card of each unit under the steel pipe, which records the heat number, tube number, steel grade, and production information of each pipe. After finishing the coating process, the production workers scan the bar code to obtain the corresponding product information and mark pipes according to the standard and contract requirements to ensure the traceability of the product.
Generally speaking, the packaging of products plays a crucial role in protecting products during transportation, so the company is also very concerned about this process. According to the size, coating, and other processing information of steel pipe, the company usually uses end caps, PVC wrap, nylon sling, galvanized strip, fumigated wood, and other materials to protect the steel pipe. At the same time, the engineers can generate a customized packing scheme since some of our customers need more solid, stable, easy-to-unload packaging solutions.

Before Shipment

Before delivering to the customers, the inspector re-checks the appearance, packaging, marking label, tag, and other specifications of the black steel pipe to ensure that the customer will not receive any defective products. After passing the inspection, the quality assurance department of Tianjin United Steel Pipe Co., Ltd (TUSPIPE) issues a mill test certificate according to each batch of shipped products.




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