TÜV 03275, CE
Submerged arc welding of fine grain structural steel where high impact values are required.
For cryogenic construction steels and Ni bearing low temperature steels.
ASTM: A203 grades D/E/F, A333/A334 grades 3/7, A350 grade LF3/LF5, A352 grade LC3
Preheat and PWHT are often not necessary but actual requirements will depend on the grade and thickness of material being welded and any design codes that apply.