By default, we will provide seamless pipes with pickled or polished surfaces as needed. We will not sandblast the pipes unless we deem it necessary. If you require sandblasting of seamless pipes, please inform us in advance, and we will perform it according to your requirements.

Unless otherwise specified, our standard length is 1 meter. This length is most convenient for transportation and can significantly save on your shipping costs. Other common lengths include 3 meters, 6 meters, and 12 meters. Of course, we can also customize any length to your requirements. If cost savings are your primary concern, we can also provide random lengths.

Cold rolling is a key cold working process in seamless tube manufacturing. This process uses rolls and mandrels to repeatedly extrude the tube, gradually reducing the outer diameter and wall thickness to achieve the required dimensional accuracy. Simultaneously, the cold rolling process produces a work hardening effect, distorting the material's crystal lattice and thus increasing the strength and hardness of the seamless tube.

Sandblasting is a commonly used surface treatment process in seamless tube production. This process uses compressed air or centrifugal force to propel fine sand particles at high speed onto the tube surface, using the impact force of the sand particles to remove surface oxide scale, rust, or other deposits, while simultaneously altering the surface roughness. After sandblasting, the surface of the seamless tube will have a uniform frosted texture, which not only improves the appearance quality, but also provides a good adhesion base for subsequent coating or anti-corrosion treatment.