The seamless casing has excellent mechanical properties, high corrosion resistance and sealing performance, and can be adapted to harsh underground environmental conditions, such as deep sea dry Wells and high-pressure oil and gas fields.
The following lists the different steps of the seamless process and the ERW manufacturing process:
Heating: Heating the billet above the recrystallization temperature to make it soft and conducive to processing.
Perforation: High-speed rotating perforation machine perforation.
Rotary extrusion or rolling: The outer diameter and wall thickness of seamless pipes can be customized according to customer requirements using a rolling machine.
Heat treatment: The corrosion resistance and mechanical properties of steel tubes refined by quenching and tempering operations.
Surface treatment: Pickling, sandblasting and spraying of anti-corrosion coating.
