... Wyes, Elbows, Tees, Crosses, Laterals and Fishtails, with sizes ranging from 2" to 4"and pressures from 3000psi to 20000psi(21MPa to ... steel are all heat-treated to enhance load-bearing capacity and lengthen service life. They may have union ends for ... strength alloy steel, and machined by NC machine tools. We can provide various types of crossovers as per customers' requirements. valve seats