Tubing head spool:Adapter Spools, Spacer Spools, Drilling Spools, Riser and Diverter Spools in accordance with API 16A Tubing head spool Tubing head spool :Adapter Spools, Spacer Spools, Drilling Spools, Riser and Diverter Spools Ruiyi manufactured are all in accordance with API 16A SpecificationWork pressure:3000-20000psiMaterial class: AA BB CC DD EE FF HHMain bore:2 1/16”-4 1/16”Temperature ...