A devolatilizer vessel comprising: a vessel header comprising a plurality of alternating vessel header penetrations; and a plurality of lateral flow tubes arranged in a parallel configuration, wherein each lateral flow tube enters the vessel header through one of the alternating vessel header penetrations with a single vessel header penetration per lateral flow tube, wherein each lateral flow tube comprises a perforated section located within the vessel header, characterized in that the perforated section comprises a non-circular cross-section (1100; 1200; 1300), wherein the non-circular cross-section (1100; 1200; 1300) has the shape of a circular sector, an elliptical sector, or an irregular quadrilateral, - wherein the non-circular cross-section (1100; 1200) has the shape of a circular sector or an elliptical sector, the non-circular cross-section (1100; 1200) having two straight sides (1110a, 1110b;1210a, 1210b), a third side of the non-circular cross-section (1100; 1200) being an arc, the two straight sides (1110a, 1110b;1210a, 1210b) connecting at an angle that is equal to or more than 70-76 degrees, and each straight side (1110a, 1110b;1210a, 1210b) connecting with the arc at an angle (1115a, 1115b; 1215a, 1215b) that is greater than 90 degrees, or - wherein the non-circular cross-section has the shape of an irregular quadrilateral, the non-circular cross-section having two straight sides (1310a, 1310b), two additional straight sides (1320a, 1320b) that connect together, wherein the two straight sides (1310a, 1310b) connect at an angle that is equal to or more than 70-76 degrees, each straight side (1310a, 1310b) connecting with the corresponding additional straight side (1320a, 1320b) at an angle (1315a, 1315b) that is greater than 90 degrees and the two additional straight sides (1320a, 1320b) connecting together at an angle. a vessel header comprising a plurality of alternating vessel header penetrations; and a plurality of lateral flow tubes arranged in a parallel configuration, wherein each lateral flow tube enters the vessel header through one of the alternating vessel header penetrations with a single vessel header penetration per lateral flow tube, wherein each lateral flow tube comprises a perforated section located within the vessel header, characterized in that the perforated section comprises a non-circular cross-section (1100; 1200; 1300), wherein the non-circular cross-section (1100; 1200; 1300) has the shape of a circular sector, an elliptical sector, or an irregular quadrilateral, - wherein the non-circular cross-section (1100; 1200) has the shape of a circular sector or an elliptical sector, the non-circular cross-section (1100; 1200) having two straight sides (1110a, 1110b;1210a, 1210b), a third side of the non-circular cross-section (1100; 1200) being an arc, the two straight sides (1110a, 1110b;1210a, 1210b) connecting at an angle that is equal to or more than 70-76 degrees, and each straight side (1110a, 1110b;1210a, 1210b) connecting with the arc at an angle (1115a, 1115b; 1215a, 1215b) that is greater than 90 degrees, or - wherein the non-circular cross-section has the shape of an irregular quadrilateral, the non-circular cross-section having two straight sides (1310a, 1310b), two additional straight sides (1320a, 1320b) that connect together, wherein the two straight sides (1310a, 1310b) connect at an angle that is equal to or more than 70-76 degrees, each straight side (1310a, 1310b) connecting with the corresponding additional straight side (1320a, 1320b) at an angle (1315a, 1315b) that is greater than 90 degrees and the two additional straight sides (1320a, 1320b) connecting together at an angle. - wherein the non-circular cross-section (1100; 1200) has the shape of a circular sector or an elliptical sector, the non-circular cross-section (1100; 1200) having two straight sides (1110a, 1110b;1210a, 1210b), a third side of the non-circular cross-section (1100; 1200) being an arc, the two straight sides (1110a, 1110b;1210a, 1210b) connecting at an angle that is equal to or more than 70-76 degrees, and each straight side (1110a, 1110b;1210a, 1210b) connecting with the arc at an angle (1115a, 1115b; 1215a, 1215b) that is greater than 90 degrees, or - wherein the non-circular cross-section has the shape of an irregular quadrilateral, the non-circular cross-section having two straight sides (1310a, 1310b), two additional straight sides (1320a, 1320b) that connect together, wherein the two straight sides (1310a, 1310b) connect at an angle that is equal to or more than 70-76 degrees, each straight side (1310a, 1310b) connecting with the corresponding additional straight side (1320a, 1320b) at an angle (1315a, 1315b) that is greater than 90 degrees and the two additional straight sides (1320a, 1320b) connecting together at an angle.