GB/T 25997-2020 English PDF

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GB/T 25997-2020: Polyisocyanurate(PIR)products for thermal insulation
Status: Valid

GB/T 25997: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25997-2020	259	Add to Cart	3 days	Polyisocyanurate(PIR)products for thermal insulation	Valid
GB/T 25997-2010	359	Add to Cart	3 days	Polyisocyanurate products for thermal insulation	Obsolete

Similar standards

GB/T 25996   GB/T 30801   GB/T 30802   GB/T 25998   

Basic data

Standard ID: GB/T 25997-2020 (GB/T25997-2020)
Description (Translated English): Polyisocyanurate(PIR)products for thermal insulation
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q25
Classification of International Standard: 91.120.10
Word Count Estimation: 14,135
Date of Issue: 2020-06-02
Date of Implementation: 2021-04-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 25997-2020: Polyisocyanurate(PIR)products for thermal insulation

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Polyisocyanurate products for thermal insulation) ICS 91.120.10 Q25 National Standards of People's Republic of China Replace GB/T 25997-2010 Polyisocyanurate products for thermal insulation 2020-06-02 release 2021-04-01 Implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 25997-2010 "polyisocyanurate products for thermal insulation", compared with GB/T 25997-2010, except for editing The main technical changes outside the sexual modification are as follows. --- Modify the classification and product marking (see 4.1, 4.2,.2010 version 4.1, 4.2); --- Modified the appearance quality requirements and test methods (see 5.1.1, 6.2,.2010 version 5.1, 6.3); --- Modify the size tolerance and test method of Class A product board (see 5.1.2, 6.3, 5.2 and 6.3 of.2010 edition); --- Modify the requirements of thermal conductivity (average temperature 25℃, -20℃), delete the requirement of average temperature 70℃ thermal conductivity (see 5.1.3, version 5.3 in.2010); --- Increased core density requirements and test methods (see 5.1.3, 6.3); --- Increased requirements and test methods for closed cell rate (see 5.1.3, 6.9); --- Modified the compressive strength requirements and test methods (see 5.1.3, 6.5, 5.3, 6.4 of the.2010 edition); --- Modify the dimensional stability requirements and test methods (see 5.1.3, 6.7, 5.3, 6.6 of the.2010 edition); --- Modify the requirements and test methods of the moisture permeability coefficient (see 5.1.3, 6.8, 5.3, 6.7 of the.2010 edition); --- Increased the tensile strength requirements and test methods of Class A products (see 5.1.3, Appendix A); --- Modify the requirements and test methods of combustion performance (see 5.1.4, 6.11, 5.4, 6.9 of.2010 edition); --- Added requirements and test methods for residual chlorofluorocarbon (CFC) blowing agent (see 5.1.5, 6.12); --- Modified the corrosive requirements (see 5.2.1, 5.5 in the.2010 edition); --- Added the requirement that the average temperature of Class A products is -165℃ thermal conductivity (see 5.2.2.1); --- Increased requirements and test methods for average linear expansion coefficient (see 5.2.2.2, 6.14); --- Increased the requirements of low temperature mechanical properties at -165 ℃ (see 5.2.2.3); --- Added other requirements for compressive strength in three directions (see 5.3.1); --- Added other requirements and test methods for compression creep (see 5.3.2, 6.15); --- Added other requirements and test methods for residual hydrofluorocarbon and hydrofluorocarbon blowing agent (HCFC/HFC) (see 5.3.3, 6.12); --- Removed the requirement for the maximum operating temperature (see 5.6 of the.2010 edition); --- Modified the factory inspection items (see 7.1.1, 7.1.1 in the.2010 version); --- Modified type inspection items (see 7.1.2, 7.1.2 in the.2010 edition); --- Modified the judgment rules (see 7.3, 7.3 in the.2010 edition); --- Revised signs, labels, packaging, transportation and storage (see Chapter 8, Chapter 8 of the.2010 edition). This standard was proposed by the China Building Materials Federation. This standard is under the jurisdiction of the National Thermal Insulation Material Standardization Technical Committee (SAC/TC191). This standard was drafted by. Nanjing Glass Fiber Research and Design Institute Co., Ltd., Zhejiang Zhenshen Insulation Technology Co., Ltd., Dehe Technology Group Co., Ltd., Jiangsu Zhongsheng Pipeline Engineering Technology Co., Ltd., Zhejiang Zhenyang Insulation Technology Co., Ltd., National Fiberglass Product Quality Supervision and Inspection Center. The main drafters of this standard. Ding Qing, Cui Jun, Zhang Minzhe, Zhang Yongfu, Guan Jinguo, Zhang Wanwei, Zhang Ping, Cao Jingming, Li Jiao, Li Junguang, Hao Zhengtao, Zhang Shuaikai, Pan Yang, Wang Ling, Chen Yongjian, Hou Peng, Wei Shanzhi, Yan Huifeng, Tang Jian, Zhang Jianhong, Qu Huili, Cui Chenglin. The previous versions of the standard replaced by this standard are as follows. ---GB/T 25997-2010. Polyisocyanurate products for thermal insulation

1 Scope

This standard stipulates the classification and marking, requirements, test methods, inspection rules and markings, and markings of polyisocyanurate products (PIR) for thermal insulation Sign, pack, transport and store. This standard applies to polyisocyanurate produced with polyol/polyisocyanate as the main raw material at a temperature of -183℃~150℃ Ester products.

2 Normative references

The following documents are essential for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document. GB/T 191 Icon mark for packaging, storage and transportation GB/T 2406.2 Determination of combustion behavior of plastics by oxygen index method Part 2.Room temperature test GB/T 2918-2018 Standard environment for plastic sample condition adjustment and testing GB/T 4132 Thermal insulation materials and related terms GB/T 5480 Test method for mineral wool and its products GB/T 5486 Test method for inorganic rigid insulation products GB/T 6342 Determination of linear dimensions of foamed plastic and rubber GB/T 6343 Determination of Apparent Density of Foam Plastic and Rubber GB 8624-2012 Classification of combustion performance of building materials and products GB/T 8810 Determination of water absorption of rigid foam GB/T 8811 rigid foam plastic dimensional stability test method GB/T 8813 Determination of compressive properties of rigid foam plastics GB/T 10294 Determination of steady-state thermal resistance and related characteristics of thermal insulation materials GB/T 10295 Determination of steady-state thermal resistance and related characteristics of thermal insulation materials GB/T 10799 Determination of open and closed cell volume percentage of rigid foam GB/T 17146 Test method for water vapor permeability of building materials and their products GB/T 17393 Specification for thermal insulation materials covering austenitic stainless steel GB/T 20673 Determination of linear expansion coefficient of rigid foam below ambient temperature GB/T 32983 Determination of compression creep properties of thermal insulation products for construction GB/T 34005 Test method for water vapor transmission performance of tubular insulation products QB/T 5114 Determination of residual blowing agent in rigid polyurethane foam

3 Terms and definitions

The terms and definitions defined in GB/T 4132 apply to this document. ......

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