1. High-frequency Longitudinal Welded Pipes are molded by advanced processing craftsmanship with reliable quality, good welding position, stabile welding parameters, fast welding speed and high output. The equipment and technology of the entire production line are reached the level of current world-class.

2. Longitudinal Welded Pipes Features:

(1) in the forming process of high-frequency straight seam welded steel pipes the resilience and residual stress are small.

(2) deformation after hardening is less, and the geometry precision is precise after re-round, which can guarantee the quality of construction and welding.

(3) the weld shape of high-frequency straight seam welded steel pipes is good, and not prone to biting edge, nor dissymmetric welding defects.                                             

(4) the weld bead of straight seam steel pipes is allocated on the same point of the circle, therefore, it can be placed according to different requirements.

3. Executive standards and usage of products:
Products carry out such standards as GB/T3091-2001, GB/T9711.1-97 and APISpec5L and mainly used in the delivery of land and marine oil and gas, coal slurry and ore pulp, as well as marine platforms, power plants and chemical and urban constructions.

4. Product Specifications:  Φ127-Φ381, wall thickness: 5-14mm, material: Q235, Q345, X60.