Function: During drilling operation,casing head is an important equipment for controlling wellhead pressure casing head API Spec 6ANominal Dimension of Top Flange(in) 11.13 5/8.20 3/4.21 1/4 Working pressure of Top Flange(mpsi) 2.3.5.10 Surface casing Dimension(in) 20.13 3/8.9 5/8.7 Nominal Dimension of Side outlet(in) 2 1/16.2 9/16.3 1/8
