corrosion allowance造句怎么写

No corrosion allowance is required for such parts not in contact with the inside fluid as the outside surface of shell, skirt, support lugs and so on, except for anchor bolts.

Other parts add 1/2 of the specified corrosion allowance on each side.

corrosion allowance

For the internal parts specified in Vessel Standard such as lugs and support rings, corrosion allowance shall conform to the stipulations in it.