ASTM C302预制包覆管道用隔热材料密度和尺寸标准试验方法

ASTM C302 Standard Test Method for Density and Dimensions of Preformed Pipe-Covering-Type Thermal Insulation
ASTM C302 预制包覆管道用隔热材料密度和尺寸标准试验方法

Density measurements of preformed pipe insulation are useful in determining compliance of a product with specification limits and in providing a relative gage of product weights. For any one kind of insulation some important physical and mechanical properties, such as thermal conductivity, heat capacity, strength, etc., bear a specific relationship with its density; however, on a density basis, these properties are not directly comparable with those for other kinds of material.
The physical dimensions of preformed pipe insulation are important quantities not only for determining the density of the pipe insulation but also for determining the conformance to specifications. The use of multilayer insulations is common, and the dimensions are necessary to ensure proper nesting of the layers.

1. Scope
1.1 This test method covers the determination of the dimensions and density, after conditioning, of preformed pipe insulation.
1.1.1 Procedure A is applicable to sections of one-piece pipe covering or to sections of segmental pipe covering that can be joined together concentrically and measured as one-piece.
1.1.2 Procedure B is applicable to segmental pipe covering where each section of material is measured.
1.1.3 Procedure C is applicable to sections of one-piece pipe covering, such as soft foam or mineral wool materials, where it is possible to penetrate the material.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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 C167 Test Methods for Thickness and Density of Blanket or Batt Thermal Insulations
ASTM C168 Terminology Relating to Thermal Insulation
ASTM C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
ASTM C870 Practice for Conditioning of Thermal Insulating Materials
ASTM E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Index Terms
pipe insulation density; pipe insulation dimensions; thermal insulation;

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 来源：防火网　发布时间：12/24/2013 点击次数：1669