GB/T 30801-2014: Hygrothermal performance of building materials and products -- Determination of water-vapour transmission properties -- Box method

Delivery: 9 seconds. Download (and Email) true-PDF + Invoice.
Get Quotation: Click GB/T 30801-2014 (Self-service in 1-minute)
Newer / historical versions: GB/T 30801-2014

Preview True-PDF

Scope

This Standard specifies a box method for determining the water-vapour
permeability of building materials. The box method is used primarily to measure
the water-vapour permeance of materials that have low water-vapour
resistance, in which the influence of the surface-humidity transmission-
resistance cannot be ignored.
NOTE Materials with low water-vapour resistance includes those with no greater than 1.8
× 109 • m2 • S • Pa/kg of resistance [water vapour permeability coefficient of 5.5 × 10−8
kg/(m2 • S • Pa or above)].

Basic Data

Standard ID	GB/T 30801-2014 (GB/T30801-2014)
Description (Translated English)	Hygrothermal performance of building materials and products -- Determination of water-vapour transmission properties -- Box method
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	Q25
Classification of International Standard	91.120.10
Word Count Estimation	14,115
Date of Issue	6/24/2014
Date of Implementation	2/1/2015
Quoted Standard	ISO 9346; GB/T 20312-2006; ISO 12572-2001
Adopted Standard	ISO 21129-2007, IDT
Regulation (derived from)	National Standards Bulletin No. 14 of 2014
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This Standard specifies the test method to measure the water vapor permeability of materials through the chamber method. Box method is mainly applied to the surface of moisture-resistance can not be ignored low moisture resistance material.