Our goal is to provide high quality products at competitive prices, and top-notch service to customers around the world. We are ISO9001, CE, and GS certified and strictly adhere to their quality specifications for OEM Manufacturer Black Welded Steel Pipe, Erw/ssaw Black Steel Tube Hot Rolled Technique Hrc Mild Carbon Steel. All the time, we have been paying attention on all details to insure each product satisfied by our customers.
We adopted technique and quality system management, based on "customer orientated, reputation first, mutual benefit, develop with joint efforts", welcome friends to communicate and cooperate from all over the world.
Customer Case
Australian customer purchase powder coating pre galvanized steel square tube. After customers receives the goods for the first time. Customer tests adhesive strength between the powder and the surface of the square tube. Customers test powder and square surface adhesion is small. We have meetings with customers to discuss this problem and we do tests all the time. We polished the surface of the square tube. Send the polished square tube to the heating furnace for heating. We tests all the time and discuss with customer all the time. We keep finding ways. After many tests, the final customer is very satisfied with the products. Now customer purchase a large number of products from factory every month.
Frequently Asked Questions (FAQ)
What types of welded steel pipes do you manufacture?
We manufacture high-quality Black Welded Steel Pipes and ERW/SSAW Black Steel Tubes using hot rolled techniques and mild carbon steel.
What are the available dimensions and specifications?
Our steel pipes feature a wall thickness range of 0.6mm to 20mm, outer diameter options from 1/2’’ (21.3mm) to 16’’ (406.4mm), and customizable lengths from 1m to 14m.
What international standards and certifications do your products comply with?
Our products strictly comply with international standards such as ASTM, DIN, JIS, and BS. We are ISO9001, CE, and GS certified, with quality checks verified by ISO, BV, CE, and SGS.
How long is the typical delivery lead time?
Orders are typically processed and ready for shipment within 25 days after the receipt of the initial deposit.
What payment terms do you accept?
We offer flexible payment methods: 30% T/T deposit in advance with the remaining 70% balance due after B/L copy, or 100% irrevocable L/C at sight, and L/C after receiving B/L copy (20–30 days).
How do you ensure product quality and customer satisfaction?
As a direct factory, we manage all production stages, utilize 3 patented piping techniques, conduct strict on-site quality control, and welcome pre-shipment customer inspections at our facility.
Minjie Steel
