Methods for guarding against corrosion in steel pipes

Q: What’s the troublesome thing for purchasing and using steel pipes?

A: Corrosion in steel pipes, even in seamless steel pipe for fabricators is one of the worry for customers.

Then here is the question: How do we control and prevent corrosion in steel pipes?

Analysis for question: According to particular service environment, corrosion has many forms, like localized or widespread.

Common types: general corrosion, crevice corrosion, intergranular corrosion, pitting corrosion, and stress corrosion.

Damage of corrosion: It would become financial nightmare, even causing catastrophic failure.

Methods for preventing corrosion:

First, metal made for steel pipes should be in proper proportion. And suppliers should ensure the corrosion level for multifarious types of steel pipes, such as seamless steel pipe, ERW steel pipe and so on. For example, the filler metal should meet or exceed the level of molybdenum in the base metal. This could require the use of a nickel-based alloy, especially if the molybdenum content exceeds 4 percent.

Second, the whole process for producing steel pipes should be guaranteed very good without any mistake. Excessive heat control, components control, cleanup tools for grinding, brushing and buffing would be important for checking during the production.