... adapter is the equipment often used on frac tree and frac stack during fracturing work,which is ... to tie multiple frac lines into the frac tree we can also design many type of the ... in API 6A&16A products : 1) Wellhead and Christmas tree (casing/tubing head, casing /tubing hangers, crosses ,flange ... adaptor. frac head, tree cap etc) 2) Valve (FC/FLS gate valve, mud ...