ASTM B337 ASTM B338

O D TOLERANCE ALLOWED 6～25 ± 0.10 > 25～38 ± 0.13 > 38～50 ± 0.15 > 50～60 ± 0.18 > 60～80 ± 0.25

THE TUBE AND PIPE SUE FOR HEAT EXCHANGE AND BIKE ,