A method for connecting a tubular assembly , comprising the steps of: - forming a first tubular having a first inner diameter (D1) and a first wall thickness (T1), said first tubular being comprised of a first connection end ; - forming a second tubular having a second inner diameter (D2) and a second wall thickness (T2), said second tubular being comprised of a second connection end ; - increasing said first wall thickness (T1) of said first connection end , according to a first amount of increase in said first wall thickness (T1) ; - increasing said first inner diameter (D1) of said first connection end to a first increased inner diameter (D1') according to said first amount (T1') of increase in said first wall thickness (T1) ; - increasing said second wall thickness (T2) of said second connection end , according to a second amount (T2') of increase in said second wall thickness (T2), so as to align with said first connection end ; - increasing said second inner diameter (D2) of said second connection end to a second increased inner diameter (D2') according to said second amount (T2') of increase in said second wall thickness (T2) so as to align with said first connection end ; - attaching said first tubular and said second tubular at a weld point between said first connection end and said second connection end so as to form a tubular connection assembly , wherein said first connection end with said first amount of increase (T1') in said first wall thickness (T1) and said first increased inner diameter (D1') and said second connection end with said second amount of increase (T2') in said second wall thickness (T2) and said second increased inner diameter (D2') increases fatigue performance of said weld point of said tubular connection assembly by a target amount greater than fatigue performance of a weld point between said first inner diameter (D1) and said first wall thickness (T1) and said second inner diameter (D2) and said second wall thickness (T2). - forming a first tubular having a first inner diameter (D1) and a first wall thickness (T1), said first tubular being comprised of a first connection end ; - forming a second tubular having a second inner diameter (D2) and a second wall thickness (T2), said second tubular being comprised of a second connection end ; - increasing said first wall thickness (T1) of said first connection end , according to a first amount of increase in said first wall thickness (T1) ; - increasing said first inner diameter (D1) of said first connection end to a first increased inner diameter (D1') according to said first amount (T1') of increase in said first wall thickness (T1) ; - increasing said second wall thickness (T2) of said second connection end , according to a second amount (T2') of increase in said second wall thickness (T2), so as to align with said first connection end ; - increasing said second inner diameter (D2) of said second connection end to a second increased inner diameter (D2') according to said second amount (T2') of increase in said second wall thickness (T2) so as to align with said first connection end ; - attaching said first tubular and said second tubular at a weld point between said first connection end and said second connection end so as to form a tubular connection assembly , <EOS>