Many specifications only address external anti-corrosion for pipelines; so what specifications apply to internal anti-corrosion?
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Many specifications only address external anti-corrosion for pipelines; so what specifications apply to internal anti-corrosion? How do experienced engineers actually carry out anti-corrosion treatment inside pipes, especially for steel pipes with small diameters? Is painting sufficient for anti-corrosion, or are multiple coating layers required? ?
The above factors were taken into account when selecting the pipe wall thickness; only in some special cases with corrosion protection requirements is an inner coating necessary.
There are overall requirements for internal anti-corrosion pipes, and there are also requirements specific to plastic-lined pipes.
The types of pipelines I have come into contact with are as follows: 1. For oxygen pipelines in the empty category, sandblasting followed by acid washing and passivation is usually sufficient； 2. For acids, internal plastic pipes are generally used