6 Specimens cut in section from Loeffer Boiler Tubes:- One marked B 15 1/2" long
6 Specimens cut in section from Loeffer Boiler Tubes:- One marked B 15 1/2" long, Carbon Steel, after 15,000 hrs service; One marked A 15 1/2" long, showing welded joint; Two marked C & E 3" long showing welded joint; Two marked D & F, 2 5/8" long showing welded joint