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Significance and Use
4.1 When choosing a thermal insulation product or combination of products, physical, chemical and mechanical properties and the significance of those properties should be considered. ASTM test methods are usually performed under laboratory conditions and may not accurately represent field conditions depending on process temperature, environment, and operating conditions. Performance results obtained using ASTM test methods can be used to determine compliance of materials to specifications but do not necessarily predict installed performance. Values stated in the ASTM material standards are those that apply to the majority of materials and not to any specific product; other tested values may exist for specific material applications.
4.2 Design of thermal insulation systems requires the understanding of process requirements, temperature control, heat loss criteria, control of thermal shock, and mechanical forces on insulation generated by thermal gradients and wind environmental conditions. Sometimes, the mechanical design of piping and equipment needs to be modified to support insulation adequately and provide for insulation weatherproofing. Process requirements may dictate the control of critical temperature to prevent freezing, maintain viscosity, or minimize internal corrosion. When handling heat transfer fluids such as ethylene oxide or hot oils, the selection of insulation materials and the insulation system design becomes critical. whereby If these fluids are absorb in insulation materials, the fluid flash point could be below the fluid operating temperature. Specified heat gain or heat loss and acceptable surface temperatures could also dictate thermal design of insulation systems. Environmental corrosivity, high wind, and extreme ambient temperatures affect the selection of weatherproofing and methods of its securement. A combination of these factors plays a significant role in the selection of insulation materials and application methods to provide long-lasting trouble-free service.
4.3 Application methods are generally defined by the purchaser's specifications. However, some specialty insulation systems, such as prefabricated insulation panels for ductwork, precipitators, and tanks, will also have supplemental installation requirements specified by the insulation system manufacturer. defined by the specification of the manufacturer.
4.4 In any application of thermal insulation, the insulation requires protection of some type, be it protection from the elements such as rain, snow, sleet, wind, ultraviolet solar radiation, protection from external forces that can cause mechanical damage, vapor passage, fire, chemical attack, or any combination of these. This protection can be provided in by metal, plastic, coated or laminated composites or both, mastic coatings, or a combination of the above depending upon the application, service, and economic requirements. Considering the enormous overall cost of a new facility, and comparing the initial cost of the insulated portion as a small percentage of that overall cost with the substantially increased operating cost as a result of inefficient insulation protection, it is common sense to provide only the best insulation system available and the best protection for that long-term investment consistent with the appropriate design and economic requirements. Usually a new facility is very expensive and the initial cost of the insulation portion is a small percentage of that overall cost. However, increased operating costs can result from inefficient protection.
4.5 Bid invitations should contain information necessary to determine how guarantees of materials and application will be resolved.
4.6 It is recommended that the purchaser provide a quality assurance program that defines the inspection of all materials, material safety data sheets (MSDS), and specific application procedures before and during progress of the insulation work.
4.7 During contract negotiations, the contractor and purchaser should discuss and agree to the procedures to be adopted for suitable periodic inspection and maintenance of the insulation systems to ensure that the initial performance of the material will be maintained. And, where applicable, they should agree to the methods of repair and replacement to be adopted in case damage occurs during service or overhaul.
1.1 This guide covers information on selection of insulation materials, systems design, application methods, protective coverings, guarantees, inspection, testing, and maintenance of thermal insulation primarily for industrial applications in a temperature range of –320 to 1200°F (–195.5 to 648.8°C).
1.2 This guide is intended to provide practical guidelines, by applying acceptable current practice while indicating the basic principles by which new materials can be assessed and adapted for use under widely differing conditions. Design engineers, the general contractors, the fabricators, and the insulation contractors will find this guide helpful.
1.3 Although some insulation system designs can serve as fire protection, this guide does not address the criteria specific to that need. API 521 Guide for Pressure-Relieving and Depressuring Systems is recommended as a reference for fire protection. This guide will however address the fire properties of insulation materials.
1.4 This guide is not intended for commercial, architectural, acoustical, marine, vehicle transport, or military use.
1.5 This guide does not address insulation system design for refractory linings or cold boxes whereby these are typically package units and of a proprietary insulation design.
1.6 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.
1.7 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.
1.8 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A167 Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip
A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process
A792/A792M Specification for Steel Sheet, 55% Aluminum-Zinc Alloy-Coated by the Hot-Dip Process
B209 Specification for Aluminum and Aluminum-Alloy Sheet and Plate
C165 Test Method for Measuring Compressive Properties of Thermal Insulations
C167 Test Methods for Thickness and Density of Blanket or Batt Thermal Insulations
C168 Terminology Relating to Thermal Insulation
C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus
C195 Specification for Mineral Fiber Thermal Insulating Cement
C203 Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation
C209 Test Methods for Cellulosic Fiber Insulating Board
C240 Test Methods for Testing Cellular Glass Insulation Block
C272/C272M Test Method for Water Absorption of Core Materials for Sandwich Constructions
C302 Test Method for Density and Dimensions of Preformed Pipe-Covering-Type Thermal Insulation
C303 Test Method for Dimensions and Density of Preformed Block and BoardType Thermal Insulation
C335/C335M Test Method for Steady-State Heat Transfer Properties of Pipe Insulation
C351 Test Method for Mean Specific Heat of Thermal Insulation
C356 Test Method for Linear Shrinkage of Preformed High-Temperature Thermal Insulation Subjected to Soaking Heat
C411 Test Method for Hot-Surface Performance of High-Temperature Thermal Insulation
C446 Test Method for Breaking Load and Calculated Modulus of Rupture of Preformed Insulation for Pipes
C447 Practice for Estimating the Maximum Use Temperature of Thermal Insulations
C449 Specification for Mineral Fiber Hydraulic-Setting Thermal Insulating and Finishing Cement
C450 Practice for Fabrication of Thermal Insulating Fitting Covers for NPS Piping, and Vessel Lagging
C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
C533 Specification for Calcium Silicate Block and Pipe Thermal Insulation
C534/C534M Specification for Preformed Flexible Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form
C547 Specification for Mineral Fiber Pipe Insulation
C552 Specification for Cellular Glass Thermal Insulation
C553 Specification for Mineral Fiber Blanket Thermal Insulation for Commercial and Industrial Applications
C578 Specification for Rigid, Cellular Polystyrene Thermal Insulation
C591 Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
C592 Specification for Mineral Fiber Blanket Insulation and Blanket-Type Pipe Insulation (Metal-Mesh Covered) (Industrial Type)
C610 Specification for Molded Expanded Perlite Block and Pipe Thermal Insulation
C612 Specification for Mineral Fiber Block and Board Thermal Insulation
C665 Specification for Mineral-Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing
C680 Practice for Estimate of the Heat Gain or Loss and the Surface Temperatures of Insulated Flat, Cylindrical, and Spherical Systems by Use of Computer Programs
C692 Test Method for Evaluating the Influence of Thermal Insulations on External Stress Corrosion Cracking Tendency of Austenitic Stainless Steel
C795 Specification for Thermal Insulation for Use in Contact with Austenitic Stainless Steel
C871 Test Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride, Silicate, and Sodium Ions
C1029 Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation
C1055 Guide for Heated System Surface Conditions that Produce Contact Burn Injuries
C1104/C1104M Test Method for Determining the Water Vapor Sorption of Unfaced Mineral Fiber Insulation
C1126 Specification for Faced or Unfaced Rigid Cellular Phenolic Thermal Insulation
C1139 Specification for Fibrous Glass Thermal Insulation and Sound Absorbing Blanket and Board for Military Applications
C1289 Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board
C1393 Specification for Perpendicularly Oriented Mineral Fiber Roll and Sheet Thermal Insulation for Pipes and Tanks
C1427 Specification for Extruded Preformed Flexible Cellular Polyolefin Thermal Insulation in Sheet and Tubular Form
C1511 Test Method for Determining the Water Retention (Repellency) Characteristics of Fibrous Glass Insulation (Aircraft Type)
C1559 Test Method for Determining Wicking of Fibrous Glass Blanket Insulation (Aircraft Type)
C1617 Practice for Quantitative Accelerated Laboratory Evaluation of Extraction Solutions Containing Ions Leached from Thermal Insulation on Aqueous Corrosion of Metals
D1621 Test Method for Compressive Properties of Rigid Cellular Plastics
D2126 Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging
D2842 Test Method for Water Absorption of Rigid Cellular Plastics
D3574 Test Methods for Flexible Cellular MaterialsSlab, Bonded, and Molded Urethane Foams
E84 Test Method for Surface Burning Characteristics of Building Materials
E96/E96M Test Methods for Water Vapor Transmission of Materials
E136 Test Method for Assessing Combustibility of Materials Using a Vertical Tube Furnace at 750C
E176 Terminology of Fire Standards
E659 Test Method for Autoignition Temperature of Chemicals
E2652 Test Method for Assessing Combustibility of Materials Using a Tube Furnace with a Cone-shaped Airflow Stabilizer, at 750C
NFPA StandardsNFPA 259 Standard Test Method for Potential Heat of Building Materials NFPA 49 Hazardous Chemicals Data NFPA 90A Standard for the Installation of Air Conditioning and Ventilating Systems
Federal Standard40 CFR 60 Protection of EnvironmentStandards of Performance for New Stationary Sources Available from the U.S. Government Printing Office, Superintendent of Documents, 732 N. Capital St., NW, Washington, DC 20402-0001.
API StandardAPI 521
ICS Number Code 27.220 (Heat recovery. Thermal insulation)
UNSPSC Code 30141500(Thermal insulation)
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ASTM C1696-20, Standard Guide for Industrial Thermal Insulation Systems, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top