ASTM C1146-09(2018)
Standard Guide for Prefabricated Panel and H-bar Insulation Systems for Vessels, Ducts and Equipment Operating at Temperatures Above Ambient Air

Standard No.

ASTM C1146-09(2018)

Release Date

2018

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM C1146-09(2018)

Scope

1.1 This guide describes design, fabrication, shipping, handling, jobsite storage, and installation of prefabricated panel and H-Bar insulation systems for vessels, ducts, and equipment operating at temperatures above ambient. Typical applications include, but are not limited to, air and gas ducts, steam generating units, air quality control systems, fans, storage tanks, process vessels, and coke drums 1.2 The insulation described herein is limited to systems consisting of insulating units specially designed to fit the surfaces to be insulated, and engineered for the service and environmental requirements. The insulation unit may also include special design features which facilitate the removal and replacement for maintenance and inspection. 1.3 When prefabricated panels are used, each insulation unit factory preassembled and typically comprised of the insulation, an outer lagging to which the insulation is attached, an inner retaining wire mesh, optional foil lining, and means for mechanically securing multiple units together in an assembly. 1.4 H-bar systems represent insulation units that are typically comprised of the insulation, outer lagging and a uniquely configured subgirt design which both supports the insulation and provides a means for mechanically securing multiple units together in an assembly. The design of the subgirt creates an “H” configuration which is fabricated from light gauge sheet metal. The subgirt components consist of: (1) a “J-bar” shape which frames the perimeter edges of the surface to be insulated, holds the insulation in place along the outer edge and provides a screen attachment point for the outer lagging; (2) the “H-bar” shape is placed at defined intervals. The web section of the “H-bar” supports the insulation while the exterior flange allows for the outer lagging to be attached with threaded fasteners. 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. NOTE 1—When prefabricated panel or H-Bar insulation systems are specified, Test Methods C167, C177 and C1061, Material Specifications A36/A36M, A463/A463M, B209, C612, and Terminology C168 should be considered. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM C1146-09(2018) Referenced Document

• ASTM A36/A36M Standard Specification for Carbon Structural Steel
• ASTM A463/A463M Standard Specification for Steel Sheet, Aluminum-Coated, by the Hot-Dip Process*， 2022-11-01 Update
• ASTM B209 Standard Specification for Aluminum and Aluminum- Alloy Sheet and Plate
• ASTM C1061 
• ASTM C167 Standard Test Methods for Thickness and Density of Blanket or Batt Thermal Insulations
• ASTM C168 Standard Terminology Relating to Thermal Insulation*， 2022-05-01 Update
• ASTM C177 Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus
• ASTM C612 Standard Specification for Mineral Fiber Block and Board Thermal Insulation

ASTM C1146-09(2018) history

• 2018 ASTM C1146-09(2018) Standard Guide for Prefabricated Panel and H-bar Insulation Systems for Vessels, Ducts and Equipment Operating at Temperatures Above Ambient Air
• 2009 ASTM C1146-09(2013) Standard Guide for Prefabricated Panel and Hndash;bar Insulation Systems for Vessels, Ducts and Equipment Operating at Temperatures Above Ambient Air
• 2009 ASTM C1146-09 Standard Guide for Prefabricated Panel and Hx2013;bar Insulation Systems for Vessels, Ducts and Equipment Operating at Temperatures Above Ambient Air
• 1996 ASTM C1146-96(2003) Standard Guide for Prefabricated Panel Insulation Systems for Ducts and Equipment Operating at Temperatures Above Ambient Air
• 1996 ASTM C1146-96 Standard Guide for Prefabricated Panel Insulation Systems for Ducts and Equipment Operating at Temperatures Above Ambient Air