1. Do Q235 welded pipes need anti-corrosion treatment?
Yes. Although Q235 steel has certain corrosion resistance in dry environments, it is prone to rust in humid, corrosive, or outdoor environments. Therefore, anti-corrosion treatment (such as galvanizing, painting, or epoxy coating) is usually required to extend its service life.
2. What is the maximum diameter of Q195 welded pipes that can be produced?
The maximum diameter of Q195 welded pipes is usually around 630 mm. Due to the low strength of Q195 steel, it is not suitable for producing extra-large diameter or thick-walled pipes, which are mainly used for small and medium diameter pipes.
3. What is the common wall thickness range of Q215 welded pipes?
The common wall thickness range of Q215 welded pipes is 1.5-10 mm. It can be adjusted according to the application scenario: thin-walled pipes (1.5-3 mm) are used for light structures, and thick-walled pipes (3-10 mm) are used for low-pressure fluid transportation.
4. What is the application scope of Q235 welded pipes?
Q235 welded pipes have a wide application scope, including: medium and low-pressure fluid transportation (water, gas, oil), structural engineering (steel frames, scaffolding, bridge supports), mechanical manufacturing (support pipes, protective sleeves), and municipal engineering (sewage pipes, drainage pipes).
5. Can Q195 and Q235 steels be mixed to produce welded pipes?
It is not recommended. Q195 and Q235 have different mechanical properties and chemical compositions, which will lead to uneven strength and weld quality of the welded pipe, affecting its service performance and safety. Welded pipes should be produced with the same grade of steel.
