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National standards of straight welded pipe
Outer diameter of Tube:D <508mm, limit deviation:± 0.75% D;
D ≥ 508mm,
the limits of deviation of ± 1% D

National standards of straight welded pipe
Outer diameter of Tube:D <508mm, limit deviation:± 0.75% D;
D ≥ 508mm,
the limits of deviation of ± 1% D



