Production of longitudinal electric welded steel pipes and sections with a small and medium diameter, with high frequency welded (HFW) procedure is most common technological processes, but also for longitudinal welded steel pipes with a large diameter is used submerged arc welding (SAW).  In addition of that, in part of the installed capacity in the factory are produced open and closed profiles with a standard and special cross section, joining elements, steel strip, etc. Within the production plants, there are advanced anti-corrosion protection of internal and external side of the steel pipes with epoxy, polyethylene, cement, bitumen, zinc and various other temporary and permanent coatings. FZC 11 Oktomvri A.D. Kumanovo performs engineering services and installation of line pipes and steel constructions. In the last period of continuous production and participation in all major pipelines for water, gas and oil, the company gained an extensive experience and high reputation by adopting the strictest quality criteria in relevant EN, ISO and leading national standards (API, ASTM, DIN, BS, NF, UNI, GOST, etc.). Many of the wide products rang of FZC 11 Oktomvri A.D. are exported in the neighboring Balkan countries, but also in Western Europe. Guarantee for success in work is having an integrated system for quality management, environment, health and safety at work ISO 9001/2009, ISO 14001/2004 and BS OHSAS 18001/2007, and certificates of quality of the products: API5L/44, TUV; PED93/23/EC; CPD89/106/EEC and others.