1The outer diameter and wall thickness of the steel pipe are allowed to deviate in accordance with the table.1Regulations. Allowable deviation for outer diameter.+ 0.50mm-0.20mmWall thickness tolerance+ 0.97mm-0.77mm The standard length of steel pipes is9400mm～9750mm。 

2The bend of the steel pipe must not exceed1.0mm/mThe ends of the steel pipe should be perpendicular to the steel pipe's axis, and burrs at the cuts should be removed. 

3Tubular steel should be inspected individually by eddy current testing to verify its compactness, with the eddy current testing comparing to a sample with an artificial defect through diameter φ.2.2mm±0.01mm。 

4Each bundle of steel pipes does not exceed2Tons, the surface of steel pipes should be coated with anti-corrosion oil. Subject to negotiation between both parties and noted in the contract, it may also be marked as per the agreement. 

5Mechanical properties, after appropriate heat treatment, should meet the required standards for steel pipes.API SPEC 5CTPlease provide the Chinese content to be translated.N80Steel grade requirements.