Various parameters affecting the H2S resistance of steel used to produce seamless Line Pipes were studied using lab-tests run on more than 250 industrial heats.

It was verified that some chemical factors, such as sulfur, calcium and oxygen contents affected H2S resistance.

More than those above particular parameters, a good balance also with a high knowledge of the steel maker is required.

Those chemical aspects are more or less enhanced by the further metallurgical processes as heat treatments.

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