Method for producing a tube using a correction method and method of correcting the tube

When straightening the tube using a roll straightening machine provided with drum type straightening roll which is disposed opposite to the vertical direction, straightener delivery side of at least 3, at least the outer layer portion of the straightening roll pairs spring type hardness Hs (JIS K 6301 a type) is formed of an elastic body is 50 to 100, in the straightening rolls, is formed at the 3 position corresponding to the tube axis at the intersection of upper and lower straightening rolls, the following equation (1) in defined η imparts an offset amount to be 1.0 × This improves the S / N ratio in the eddy current from the tube surface, it is possible to improve the inspection efficiency can ensure excellent quality accuracy in heat transfer tubes used in the steam generator or the like. [Number 1] However, the tube outer diameter d (mm), the stand distance of the roll straightening machine L (mm), when the offset amount was set to [delta] (mm), a relation of