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
What are the specifications of your Pre-Galvanized and Hot Dip Galvanized steel pipes?
Our steel pipes feature a wall thickness range of 0.6mm to 20mm, outer diameters ranging from 1/2’’ (21.3mm) to 16’’ (406.4mm), and customizable lengths from 1 to 14 meters according to specific requirements.
What is the zinc coating density of your pipes?
The pre-galvanized steel pipes feature a zinc coating weight of 40--220 G/M2, while our hot dip galvanized steel pipes have a higher zinc coating density of 220--350 G/M2 to provide stronger corrosion resistance.
What certification standards do your products meet?
Our production strictly conforms to major international standards including ASTM, DIN, JIS, and BS. We also hold ISO, BV, CE, and SGS certifications to ensure superior product quality.
What makes your factory different from standard trading companies?
As a direct manufacturing factory, we offer highly competitive pricing. We hold 3 specific patents (Groove pipe, Shoulder pipe, and Victaulic pipe) and utilize advanced production lines, including 4 pre-galvanized, 8 ERW, and 3 hot-dipped galvanized lines.
What are the standard delivery times and loading ports?
Our standard delivery time is 25 days after receiving deposits. We ship directly from Tianjin/Xingang port, which is only 40 kilometers from our factory, ensuring rapid and efficient transport logistics.
How do you handle specific product customization or quality issues?
We prioritize technical support. As shown in our customer cases, we work actively with clients to solve process issues (such as modifying square tube surfaces and adjusting heating parameters) until they are fully satisfied with the performance.
Minjie Steel
