Round counterbored Oversized
SAP counterbored Oversized
Normally we recommend slipping the primary tube through the flange and weld it to the head side of the flange allowing the thickness of the flange to reduce the sheer load on the weld. On some applications counterboring is only the way to utillize an oversize tube with the available sealing surface on the head. The flanges are machined .150" deep to support the tube and allow the tube to be welded to the inside of the flange.