Process and characteristics

A new plant to produce seamless stainless-steel tubes was installed at ZM in 2021. The plant consists of cold pilger machines with an integrated internal/external tube degreasing system.We are developing an entire division dedicated to the seamless tubes. The new division, together with the increased production capacity of welded and redrawn tubes, allows ZM to expand its range of stainless tubes in next few years. Thanks to the comprehensiveness of the products offered, our company can strengthen its position as a market leader.


  • Chemical and petrochemical plants
  • Power stations
  • Petroleum refineries
  • Food and dairy
  • Automotive and aerospace
  • Pharma and chemical industry
  • Mechatronics
  • Pneumatic
  • Oil & Gas
  • Instrumentation
  • Several critical industrial purposes
  • Production range

    Rolling by cold pilger machines

    The two work rolls with the die groove, press forward and backward the shell against the mandrel to reduce to final dimension, cross section and tolerance.

    TOLERANCETight OD and ID tolerance with a very uniform WT

    ECCENTRICITYReduced tube eccentricity

    MICRO STRUCTUREFine and uniform grain structure, homogeneous material characteristics and improved mechanical properties

    SURFACE ROUGHNESSAs per customer requirement external and/or internal Ra < 0.8μm, <0.6μm, <0.4μm, < 0.25μm