Coast Guard Drawing 65B WD 4810-005 Rev A Exhaust Piping Mods to Suit IF 1312 MDE.pdf

This is a technical drawing (number 65B WD 4810-005 Rev A) detailing exhaust piping modifications for IF 1312 MDE, issued by the Office of Naval Engineering. The drawing contains a detailed materials list and general notes for exhaust system installation and modifications, including specifications for welding, spring installations, expansion joint requirements, and insulation materials.

The drawing provides comprehensive technical specifications for various components including stainless steel pipes, flanges, bellows assemblies, and insulation materials. Key requirements include that all welding must conform to MIL standard DTL-STD1, piping must be supported at anchor points as marked, and specific insulation requirements consisting of multiple layers including fiberglass felt and stainless steel wire mesh. The drawing appears to be directly related to the Coast Guard's solicitation for cleaning and inspection services of the CGC OBION's exhaust systems, providing technical details that would be relevant for contractors performing the work.