Noticias
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The expression of large diameter steel pipe diameter
1. Water and gas transportation steel pipes (galvanized or non-galvanized), cast iron pipes and other pipes, the pipe diameter should be expressed by the nominal diameter DN; 2. Seamless steel pipe, welded steel pipe (straight or spiral seam), copper pipe, stainless steel pipe and other pipes, t...Lee mas -
How to clean the straight seam steel pipe?
How to clean the straight seam steel pipe? (1) We can use solvent or emulsion to clean the surface of the steel pipe. This method is very effective for the presence of oil and grease or dust and other organic substances on the surface of the steel pipe. (2) For the case of rust on the surface of ...Lee mas -
Method for improving rust resistance of large-caliber steel pipe
1.When sand blasting or manual mechanical derusting is used, the metal scale on the surface of the large-diameter steel pipe is directly exposed to the air due to the peeling of the oxide scale from the large-diameter steel pipe. If a primer is not painted in time, the surface of the large-diamet...Lee mas -
What are the benefits of hot dip steel pipe?
What are the benefits of hot dip steel pipe? 1. The superior anti-static performance of hot dip plastic steel pipe: by adding anti-static agent to the formulation, the internal and external surface resistance can be achieved and exceed the national industry standards 2. Flame-retardant properties...Lee mas -
Application of pipeline eddy current testing
Application of pipeline eddy current testing Depending on the shape of the test piece and the purpose of the test, different types of coils can be used. There are usually three types of through-type, probe-type and insertion-type coils. Pass-through coils are used to detect tubes, rods and wires....Lee mas -
Standard for industrial pipeline anti-corrosion layer, heat insulation layer and waterproof layer
Standard for industrial pipeline anti-corrosion layer, heat insulation layer and waterproof layer All metal industrial pipelines require anti-corrosion treatment, and different types of pipelines require different types of anti-corrosion treatment. The most common anti-corrosion treatment method ...Lee mas -
Temperature problems in the production of straight seam steel pipes
In the process of producing straight seam steel pipes, the temperature must be strictly controlled, so as to ensure the reliability of welding. If the temperature is too low, it may cause that the welding position cannot reach the temperature required for welding. In the case where most of the me...Lee mas -
Lubrication problems in the production of straight seam steel pipes
Straight seam steel pipes need to use a product to match in the production process, that is, a glass lubricant, which was produced with graphite before using the glass lubricant, because at that time there was no such product in the market. Therefore, graphite can only be used as a lubricant, but...Lee mas -
Adjustment and Control of the Position of High Frequency Induction Loop of Straight Seam Steel Tube
Straight seam steel tube excitation frequency is inversely proportional to the square root of capacitance and inductance in the excitation circuit, or proportional to the square root of voltage and current. As long as the capacitance, inductance or voltage and current in the loop are changed, the...Lee mas -
Factors affecting the accuracy and resolution of oil casing wall thickness detection
The API standard stipulates that the inner and outer surfaces of the imported and imported petroleum casings must not be folded, separated, cracked or scratched, and these defects should be completely removed. Petroleum casing must be fully covered for automatic wall thickness detection. Currentl...Lee mas -
Preparation before installation of 3PE anti-corrosive steel pipe
Before embedding 3PE anti-corrosion steel pipe, you need to clean up the surrounding environment first, and conduct technical tests on the commanders and mechanical operators who participate in the clean-up work. At least one line of defense personnel should participate in the clean-up work. It i...Lee mas -
Why should pipelines be pickled, degreased and passivated?
It is mainly aimed at steel pipes, which are prone to corrosion reactions, and there is a certain hidden danger to equipment damage after corrosion. After removing all kinds of oil, rust, scale, welding spots and other dirt, it can greatly improve the corrosion resistance of steel. If there are d...Lee mas