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Hot or cold finished, heat-threated, pickled or plain- metal surface (mechanically
finished), in manufacturing lengths of 2 - 7 meters
Measurement standards
 DIN EN ISO 17456 (round) 
DIN EN ISO 17456 (hexagonal)
Tolerances
External diameter : -0/+2%, minimum -0/+1 mm
Internal diameter: +0/-2%, minimum +0/-1 mm
Eccentricity: maximum 15% of average wall tickness
Kind of inspection certificates
DIN EN 10204 (500049) 3.1 B/3.1 A / 3.1 C in accordance with agreement
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