China API 5L & API 5CT Certificated Carbon Steel Pipe Mill Since 1998
TUSPIPE is a steel pipe manufacturer who offers high-quality products and services to our clients since 1998.
Since 1998, Tianjin United Steel Pipe Co., Ltd (TUSPIPE) has been committed to supplying high-quality carbon steel pipes. Our customers like to work with us because of our professional ability and the large inventory that we offer.
The main products are API 5L Line Pipe, API 5CT Casing Pipe, and Tubing. And also, Tianjin United Steel Pipe Co., Ltd supplies slotted liner, compressor tubes, transmission shaft tubes, torque tubes, piling pipes, sprinkler pipes, boiler pipes, roller pipes, etc. Production standards include API SPEC 5CT, API SPEC 5L, JIS G 3444, JIS G 3452, 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, GB/T 9711, GB/T 3091, GB/T 13793, GB/T 19830, YB/T 5209, and SY/T 5768.
With over 500,000 tons annual production capacity, our company serves various fields and industries, such as oil & gas exploitation and transmission, ship & auto-building, water & electricity, environmental protection, mechanical engineering, infrastructure construction, etc.
The Reasons Why We Have Reliable Product Quality.
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.
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.
In order to ensure that our 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:
Charpy Impact Test
Chemical Component Analysis
Drop-Weight Tear Test
Coating, Marking, and Packaging
After the steel pipe production is completed, TUSPIPE performs the surface coating of the steel pipe according to the customer’s requirements, so as to prevent corrosion. Common 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.
TUSPIPE sticks a bar code on the inner wall of each steel pipe, and the bar code is unique on each pipe. 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 the protection of 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 delivering to the customers, the inspector re-checks the appearance, packaging, marking label, tag, and other specifications of the steel pipe to ensure that the customer will not receive any defective products. After passing the inspection, the quality assurance department issues a mill test certificate according to each batch of shipped products.
We have rich experience in various fields, such as Oil & Gas, Construction, Solar, Fluid Transmission, Minning, etc. We hope these experiences will play a key role in our future collaboration and enable our projects to proceed smoothly.