Available in a warehouse in St. Petersburg are: bends, flanges and transitions from steel 904L of the following sizes:

FLANGES GOST 12820:
1-50-16;
1-100-16;
1-150-16

ELBOWS  90° ГОСТ 17375:
57х4;
108х6;
159х6.

Transitions Concentric and eccentric  ГОСТ 17378:
Transitions Concentric 76х3,5-57х3;
Transitions Concentric 108х4-89х3,5;
Transitions Eccentric 89х3,5-76х3,5;
Transitions Eccentric 159х4,5-76х3,5.