Normal length (also called non-fixed-length length): Any length that is within the length specified by the standard and no fixed length is required is called normal length.

flexibility, especially in the production of high grade thick-walled pipe, spiral steel pipe, especially small and medium-diameter thick-walled tube has advantages over other processes,to meet user specifications in steel demand more.

flexibility, especially in the production of high grade thick-walled pipe, spiral steel pipe, especially small and medium-diameter thick-walled tube has advantages over other processes,to meet user specifications in steel demand more.