SWR PIPES & FITTINGS Nominal Size(mm) Tolerance (mm) Wall Thickness (mm) Type A Type B Min Max Min Max 75 0.3 1.8 2.2 3.2 3.8 90 0.3 1.9 2.3 3.2 3.8 110 0.4 2.2 2.7 3.2 3.8 160 0.5 3.2 3.8 4.0 4.6