"Plain - B7, L7, B16:
Usually used in Onshore as a short-term requirement because there is no protection or anti-corrosion feature. This type of BN is used in general construction, automotive, etc.
Specific for B16 & L7 are used in electrical transformers with multiple cool & hot temperature conditions.
B8 & B8M:
Stainless Steel with anti-rust properties; usually used in construction, valves, pipes, automotive, etc. with all cover conditions.
Used in Onshore / Offshore (Multi Functions).
Standards used / ASTM:
§ Plain - A193
§ HDG - A153
§ Zinc Plated - B633
§ Cadmium Plated - B766
§ PTFE - 1070-E10212A & 1014-PO1931E"