1.HDG Pipe Introduction
The first step to produce HDG Pipe is pickling, in order to remove iron oxide on the surface of the steel tube after acid cleaning, by ammonium chloride or zinc chloride or ammonium chloride and zinc chloride mixed aqueous solution tank cleaning, and then sent to the hot dip plating tank. The complex physical and chemical reaction of the steel tube matrix and the molten coating formed a strong and corrosion-resistant structure of a zinc iron alloy layer. The alloy layer is integrated with pure zinc layer and steel tube matrix. Therefore, its corrosion resistance is strong.
1. Uniformity of zinc-plating layer: the HDG Pipe samples are impregnated 5 times in the copper sulfate solution without turning red (copper plating)
2. Surface quality: the surface of the HDG Pipe shall have a complete galvanized layer, and there shall be no uncoated black spots and bubbles, allowing for the existence of small rough surface and local zinc tumor.
3. The weight of galvanized layer: according to the requirements of the buyer, the HDG Pipe can be used for the determination of the weight of the zinc layer. The average value should be no less than 500g/ m2, and no sample size is less than 480g/ m2.
2.HDG Pipe Product Specification
3.HDG Pipe Production Process
4. HDG pipe Factory Introduction
The main products of Tianjin Tianyingtai Steel Pipe Co.,Ltd are: HDG pipe, welded pipe, galvanized pipe, spiral pipe, galvanized steel pipe, etc. The factory always adheres to the product quality and customer service as the first thing. Factory is strictly accordance with ISO9001:2000. Standard quality management system is established, from research and development, raw material procurement, processing and manufacturing, testing control, transportation to after-sales service set up a set of perfect management system. To improve the management level and to pay more attention to customers' satisfaction, constantly provide customers with satisfactory products. We can also provide all kinds of qualified products according to customers' requirements, and continuously meet the needs of customers.