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Composition of ventilation ducts
In ventilation systems, tolerant ventilation pipes are used to feed or draw air. The cross section of the ventilation pipe is round and rectangular. In addition to the straight pipe, the ventilation pipe is made of elbows, back and forth bends, variable diameter bends, three-way, four-way and oth...Read more -
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...Read more -
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 ...Read more -
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...Read more -
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...Read more -
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....Read more