Arvedi Tubi Acciaio

CONCENTRIC TUBE ECCENTRIC TUBE OD CENTre ID CENTre A Ar vedi LC/GSM tubes vs Seamless eccentricity absent or negligible both in the cross section and along the tube length ARVEDI TUBES FOR CONSOLIDATION APPLICATIONS Self-drilling bars Arvedi Tubi Acciaio is the European leader in the production of hot rolled tubes for the manufacture of self-drilling anchor systems, used for consolidating tunnel roofs and for stabilising land such as steep slopes and landslides. The standard steel grades are S355J2H, S355 mod., 28MN6, 34MNB5, 38MNB5 . In collaboration with its customers’ technical offices ATA studies and develops suitably customised and optimised steel grades and specific sizes in order to increase the workability of the bars and obtain the best performances on site and in operation. Expandable rock bolting system These special section tubes are produced to specific ATA specifications and can be supplied crude or full body normalised. Micropiling Micropiling is produced in compliance with standard EN 10219 or EN 10296 in commercial length bars, with the internal bead removed and with smooth ends in the following steel grades: basic steels: S235 – S275 – S355J2 high strength: S420MC – S460MC ultra-high strength: S500MC – S700MC other steel grades with high mechanical characteristics: N80 For the steel grades included in the standard EN 10219 supplies are certified (as per European Directive 305/11 CE ) and are accompanied by EN10204 certification and declaration of performan- ce (as per regulation EU 305/2011 ). Arvedi Tubi Acciaio is CE certified for construction products: EN10219: licence no. CE 1608 CPR P064 EN10210: licence no. CE 1608 CPR P063 and 1608 CPR P157 T H E A R V E D I H O T S T R E T C H - R E D U C E D Arvedi hot rolled tubes (Arvedi LC ® and GSM ® ) are produced on the hot stretch-reducing mill, a unique plant that allows small and medium/small-diameter tubes to be obtained with the internal bead removed, even those with thick walls in the normalised state. The production cycle, starting from hot rolled strip, foresees forming, HFI welding and removal of the internal bead of the “mother shell” which is subsequently heated in an induction heater and hot rolled on the stretch-reducing mill. The excellent degree of workability, appreciated by users of Arvedi LC ® tube, is the result of a controlled hot reduction process which, besides supplying the tube in the normalised state, guarantees complete homogeneity of the material’s mechanical and physical characteristics. Arvedi LC ® tubes Arvedi LC ® is the Arvedi trademark identifying the production of tubes and pipes for the plumbing and heating sector obtained with a hot rolling process. These tubes and pipes, in compliance with standard EN 10255, are used for plumbing and heating plants. After the production process these tubes and pipes are hot-dip galvanised using SHG lead-free zinc with a high degree of purity. Arvedi LC ® tubes can be supplied with the following ends: - plain, square cut and bevelled - threaded with EN 10226-1 threading and with coupling in compliance with standard EN 10241 screwed onto one end - grooved: suitable for using “Vitaulic”-type screwed couplings Arvedi GSM ® tube The characteristics of homogeneity and workability of Arvedi LC ® tube are enhanced in the heavy wall mechanical tubes (GSM ® ) where the ratio between wall thickness and diameter is pushed to ratios of over 30%. The peculiarity of the Arvedi pro- cess, with rolling of a mother shell “not obtained through drilling” but through welding starting from a strip with limited thickness variations and the use of a stretch-reducing mill with individually motorised stands, guarantees that tubes are obtained with superior geometrical charac- teristics, negligible eccentricity and limited internal polygonality.