TOLERANCES INSIDE HONED DIAMETER:

Dividing the inner diameter size by wallthickness value, if the result is:
          -  up to 20                 ISO H8
          -  from  20,1 to 25      ISO H9
          -  from 25,1 to 28       ISO H10
          -  over 28,1                ISO H11

CUTTING

A.L.T.A. Spa is able to supply cut tubes on customers request also with deburring, chamfering and thread:

Packaging:

              • standard (oiling - plugging and bundling)
              • jute
              • wooden slates
              • lamiflex and similar 
              • packing on pallets with collars (max 2 tons inside) 

OILING

Anticorit 77 is the oil used by A.L.T.A. Spa. It is a protective product based on hydrocarbon solvents, highly-refined paraffinic mineral oils and antioxidant, antitrust and removable additives.

DATA:

PROPERTIES  U. M.    VALUE  METHODS
APPEARANCE -------  Homogeneous   L.F.
COLOUR ------- Clear Brown

 ASTM D 1500

SALT SPRAY TEST  h  100

 ASTM B 117

REMOVABILITY  %  40

 UNICHIM 454

 
Removal by solvents at room temperature
or vapour phase or any alkaline solutions at 60° C.
 
REMARKS: The material good stocked in protected room 
keep its properties 6 months.
Confer exhausted product complying with local Regulations.

 

METROLOGY LAB:

Into the Quality System circuit ISO 9002 - UNI EN 29002, A.L.T.A. Spa has equipped its own metrology lab with the most advanced electronic equipments to grant quality maintenance for a long time.

MARKING:

On the full length or both extremities with:
SIZE - STEEL GRADE - HEAT NUMBER TREATMENT - ALTA SPA LOGO

CERTIFICATION:

The test certificate EN 10204:2004 / 3.1 comes free and indicates chemical analysis and mechanical properties.
The traceability of the material shipped is guaranteed by the heat number marked on each tube. It also provides a certificate of conformity showing the agreed parameters, related to the finishing of tubes.

PACKAGING:

The material is internally protected with oil antioxidant and, if not tampered with, guaranteed for six months in a heated controlled enviroment;
the extremity are closed by caps of plastic material. The tubes are bundled by steel straps in hexagonal bundles weight approx. 1000 - 2500 kg.

MEASURING INSTRUMENTS USED FOR THE CONSTANT CONTROL AND MAINTENANCE OF TOLERANCE:

Inner Diameter:

Model: marposs mod.: E18/M1
use: measuring inner diameter

Wallthickness:

Ultrasonic thickness gauge type: krautkraemer mod.: DM2-E-V
use: measuring steel thickness

Chromed Surface:

electronic thickness gauge: fischer mod.: DELTASCOPE MP 3C
use: measuring chrome thickness

Tampons for controlling the internal straightness

 

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