Galvanized Steel Pipe

• First, we use solvents to clean the surface of the steel to remove organic matter on the surface.

• Then toolsare used by ours to remove rust (wire brush) to remove loose or inclined scales, rust, welding slag, etc.,

• We use pickling.
• Galvanizing is divided into hot-dip galvanizing and cold-dip galvanizing. Hot-dip galvanizing is not easy to rust, and cold galvanizing is easier to rust.

The spraying method for galvanized pipes can be carried out according to the normal spraying construction, following the process of surface treatment – spraying primer – spraying top coat. Scrub the surface of the substrate with solvent to remove oil and dirt, clean the substrate to ensure adhesion.
Spray ED1000 epoxy primer to reach the specified film thickness. After the primer is applied, the top coat is applied at an interval of 24 hours. The top coat is selected according to the actual use. For indoor environment, epoxy resin topcoat and polyurethane topcoat can be chosen. Outdoor environment can choose acrylic polyurethane topcoat, acrylic topcoat, fluorocarbon topcoat, and the coating can reach the specified film thickness.
Use phosphate primer or high adhesion primer. Now there is a phosphate primer on the market, its function is similar to the phosphate treatment, can improve the roughness of the zinc tube to a certain extent. Primer or direct use of an intermediate paint finish. Before painting the galvanized pipe, it needs to be lightly polished so as not to damage the anti-corrosion layer of the galvanized pipe itself. The treatment of the substrate and the choice of paint are key factors in avoiding paint flaking from galvanized pipes.

• When purchasing galvanized pipes, be sure to check in detail whether the appearance of the galvanized pipes is smooth, whether there are zinc nodules and burrs. In general, if the surface of the galvanized pipe is free of zinc nodules and burrs, and is silver-white, it is a high-quality galvanized pipe.
• When purchasing galvanized pipes, you must check the appearance of galvanized pipes in detail to see if there are any obvious defects, and check whether the color of the galvanized pipes is normal, and check whether the galvanized layer is even.
• When purchasing galvanized pipes, you must check in detail whether the length of the galvanized pipe meets the qualified standard, and check whether the diameter and wall thickness of the galvanized pipe meet the qualified standard.

• The grade and chemical composition of the galvanized steel pipe. In the manufacturing process of the galvanized steel pipe, the grade and chemical composition of the steel used must meet the requirements for the grade and chemical composition of the clarinet in GB-3092.
• Galvanized steel pipe should be hot-dip galvanized.
• Thread and pipe connection of galvanized steel pipe.
• Generally speaking, the threaded steel pipe after galvanizing should be made after galvanizing.
• Steel pipe joints and threads shall comply with YB238 regulations, and cast iron joints shall comply with YB230 regulations.
• In short, galvanized steel pipe is a commonly used decoration material in life, and it is also more common in life. However, since the types and materials on the market are indeed diverse, you must look carefully when choosing, and choose good quality galvanized pipes, and don’t be fooled by some too cheap materials. In addition, I hope everyone should pay attention not only to the quality of the galvanized iron insulation pipes, but also to the manufacturer’s after-sales guarantees when choosing insulation pipes.

Galvanized steel pipes are one of the most important industrial pipes and are widely used in various light and heavy industries. The welding method is mainly used to connect galvanized pipes to each other or between galvanized pipes and other equipment. The most common welding method is the five-step welding method. The specific implementation steps of the five-step welding method are as follows.
◆ Step 1: Size of the orifice of the galvanized steel pipe. During the welding process, the length of the pipe should be measured first, and then the pipe size should be cut with a pipe cutting machine.
◆ Step 2: Clean the galvanized steel pipe. Due to the metal characteristic of steel pipe, some waste slag will be produced in the steel pipe due to oxidation, and some waste slag will affect the welding effect. Therefore, the scrap slag inside the tube should be ground off with emery cloth or sandpaper before welding.
◆ Step 3: Clean the fittings with galvanized steel pipe brush. Cleaning the fittings can make the welded galvanized pipe ensure the tinned joints.
◆ Step 4: Master the welding time of the galvanized steel pipe. Generally speaking, the length of welded pipe you need requires the corresponding length of solder.
◆ Step 5: Add heat to the galvanized steel pipe with a torch. The torch heats the pipe mainly to ensure that the welded points of the pipe are heated evenly. It is worth noting that when using a flare, make sure the flame is close enough to cover the entire diameter of the pipe.