US 11,865,646 B2
Tube to tube sheet welding for fabrication of vertical boiling reactor with reduced tube pitch
Mohammad Ganjvar, Mahwah, NJ (US)
Assigned to Scientific Design Company, Inc., Little Ferry, NJ (US)
Filed by Scientific Design Company, Inc., Little Ferry, NJ (US)
Filed on Jan. 13, 2022, as Appl. No. 17/575,023.
Claims priority of provisional application 63/139,019, filed on Jan. 19, 2021.
Prior Publication US 2022/0226937 A1, Jul. 21, 2022
Int. Cl. B23K 33/00 (2006.01); B01J 19/00 (2006.01); B01J 19/24 (2006.01); B23K 101/14 (2006.01)
CPC B23K 33/006 (2013.01) [B01J 19/0053 (2013.01); B01J 19/2415 (2013.01); B01J 2219/00081 (2013.01); B23K 2101/14 (2018.08)] 21 Claims
OG exemplary drawing
 
1. A shell-and-tube heat exchange reactor comprising:
an inlet tube sheet having a plurality of first openings and located at an inlet end of the reactor;
an outlet tube sheet having a plurality of second openings and located at an outlet end of the reactor;
a plurality of elongated tubes located between the inlet tube sheet and the outlet tube sheet and passing through the plurality of first and second openings;
a tube sheet overlay material located atop each of the inlet tube sheet and the outlet tube sheet, wherein the tube sheet overlay material contains a plurality of third openings configured to allow the plurality of elongated tubes to pass there through, each third opening of the plurality third openings comprises a beveled upper portion having a welding groove located between a beveled sidewall of the beveled upper portion of the third opening and an outermost sidewall of the elongated tube passing through the third opening, wherein the beveled upper portion of the third opening of the tube sheet overlay material has a V-bevel shape, a groove angle from about 30° to about 150°, and a bevel angle from about 15° to about 75°; and
a welding material located inside the welding groove and affixed to the outermost sidewall of the elongated tube passing through the third opening, wherein the welding material located inside the welding groove has a tensile strength of greater than 600 MPa.