588-6233962.pdf

This document is an insulation schedule specification for the construction of the Military Sealift Command Ocean Surveillance Ship T-AGOS 13, prepared by Halter Marine Inc. under federal contract N00024-85-C-2046. The specification establishes comprehensive requirements for piping and equipment insulation throughout the vessel, covering material types, installation methods, and performance standards.

The insulation materials are categorized by temperature range: flexible formed plastic (MIL-P-15280, Type II) for low temperatures (-30°F to 125°F); mineral fiber (Fed. Spec. HH-I-558) for medium temperatures (126°F to 599°F); and calcium silicate (Fed. Spec. HH-I-523c) for high temperatures (1000°F to 1200°F). Lagging materials include fibrous glass (MIL-C-20079) with specified adhesives, bedding compounds, coating compounds, and end sealing compounds. The specification requires insulated and lagged surface temperatures not to exceed 150°C (65.5°C) and mandates vapor sealer coatings on all insulation surfaces where applicable. Installation requirements specify molded or preformed segments for straight runs with buttered joint surfaces, tightly fitted and cemented joints, and securing with No. 18 gauge galvanized iron wire at specified intervals based on pipe diameter. The document details special provisions for antisweat insulation in humid spaces (double layer, waterproofed), refrigerant piping, machinery and equipment, double-layer construction for metal surfaces below 0°F, and thermal insulating tape for piping smaller than 3/8 inches. The insulation schedule table on Sheet 8 specifies material types and thickness for numerous piping systems throughout the vessel, including potable water systems, sanitary systems, chilled water, diesel engines, and cooling systems, with materials ranging from mineral fiber and plastic foam to calcium silicate depending on temperature requirements and system function.