Internal anti-corrosion coating of vent riser

2007-12-10View Original

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I just saw some drawings for gas stations, and it was specified that their vent pipes (20#) need to have internal anti-corrosion treatment. Why is that? Is it necessary? Why wasn’t internal protection installed on the long-distance pipeline even though I saw it?

Reply #22007-12-10

Unlike long-distance pipelines, this vent pipe is usually empty; it is prone to rusting due to being made of 20# material, so internal anti-corrosion treatment is recommended. Adding weep holes at the bottom of the pipes on the 2nd floor can prevent internal water accumulation (rainwater), but it does not provide corrosion protection.

Reply #32007-12-11

Is internal anti-corrosion not applied because the pipeline is short? This post was last edited by niruoshui on 2007-12-11 14:31]

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Internal anti-corrosion coating of vent riser

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