ASTM C921热绝缘护套材料的性能测定的操作标准

ASTM C921 Standard Practice for Determining the Properties of Jacketing Materials for Thermal Insulation
ASTM C921 热绝缘护套材料的性能测定的操作标准
 
This practice establishes the standard procedures for determining the material and physical properties for jacketing materials applied over thermal insulation on piping and equipment, including materials applied solely for physical protection, and materials applied as vapor retarders. This practice does not cover field applied mastics or barrier coatings and their attendant reinforcements, nor does it cover jackets for buried insulation systems. Jackets covered here are grouped into two types, each of which are subdivided further into grades and classes. Properties to which the jackets should conform to are permeance, tensile strength, puncture resistance, surface burning characteristics, flame resistance permeance, dimensional stability, fungi resistance, elevated temperature and humidity resistance, and thermal integrity.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope
1.1 This practice covers jackets applied over thermal insulation on piping and equipment, including materials applied solely for physical protection, and materials applied as vapor retarders.
1.2 This practice provides material and physical requirements, or both, for jackets. Guidance in selecting the proper jacket for a given application can be found in Guide C1423.
1.3 This practice does not cover field applied mastics or barrier coatings and their attendant reinforcements, nor does it cover jackets for buried insulation systems.
1.4 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.
1.5 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 and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately)
ASTM Standards
ASTM A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
ASTM A336/A336M Specification for Alloy Steel Forgings for Pressure and High-Temperature Parts
ASTM A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process
ASTM A792/A792M Specification for Steel Sheet, 55 % Aluminum-Zinc Alloy-Coated by the Hot-Dip Process
ASTM B209 Specification for Aluminum and Aluminum-Alloy Sheet and Plate
ASTM C168 Terminology Relating to Thermal Insulation
ASTM C390 Practice for Sampling and Acceptance of Thermal Insulation Lots
ASTM C921 Practice for Determining the Properties of Jacketing Materials for Thermal Insulation
ASTM C1258Test Method for Elevated Temperature and Humidity Resistance of Vapor Retarders for Insulation
ASTM C1263 Test Method for Thermal Integrity of Flexible Water Vapor Retarders
ASTM C1338 Test Method for Determining Fungi Resistance of Insulation Materials and Facings
ASTM C1423 Guide for Selecting Jacketing Materials for Thermal Insulation
ASTM D774/D774M Test Method for Bursting Strength of Paper
ASTM D828 Test Method for Tensile Properties of Paper and Paperboard Using Constant-Rate-of-Elongation Apparatus
ASTM D882 Test Method for Tensile Properties of Thin Plastic Sheeting
ASTM D1204 Test Method for Linear Dimensional Changes of Nonrigid Thermoplastic Sheeting or Film at Elevated Temperature
ASTM E84 Test Method for Surface Burning Characteristics of Building Materials
ASTM E96/E96M Test Methods for Water Vapor Transmission of Materials
TAPPI Standards
T461 Flame Resistance of Treated Paper and Paperboard
Index Terms
below ambient ; flexible; jacket; semi-rigid; thermal insulation; Insulated wire and cable jacket--specifications; Jacketing materials for thermal insulation; Thermal insulating materials--specifications;

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 来源：防火网　发布时间：12/25/2013 点击次数：1976