GB/T 3985-2008 English PDF

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GB/T 3985-2008: Compressed asbestos fibre jointing
Status: Valid

GB/T 3985: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 3985-2008	209	Add to Cart	3 days	Compressed asbestos fibre jointing	Valid
GB/T 3985-1995	319	Add to Cart	3 days	Asbestos-rubber sheets	Obsolete
GB 3985-1983	199	Add to Cart	2 days	Asbestos-rubber sheets	Obsolete

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Basic data

Standard ID: GB/T 3985-2008 (GB/T3985-2008)
Description (Translated English): Compressed asbestos fibre jointing
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q61
Classification of International Standard: 23.040.80
Word Count Estimation: 9,958
Date of Issue: 2008-08-20
Date of Implementation: 2009-04-01
Older Standard (superseded by this standard): GB/T 3985-1995
Regulation (derived from): National Standard Approval Announcement 2008 No.14 (Total No.127)
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 classification of asbestos rubber sheet and marking, requirements, test methods, inspection rules, signs, packaging, transport and storage. This standard applies to chrysotile asbestos as a reinforcing fibers, rubber binder, by roll forming sheet metal used in the manufacture of various types of heat- pressure gasket. This sheet can be made ??with reference to the use of the gasket.

GB/T 3985-2008: Compressed asbestos fibre jointing

---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.
Compressed asbestos fibre jointing ICS 23.040.80 Q61 National Standards of People's Republic of China Replacing GB/T 3985-1995 Asbestos Rubber Sheet Posted 2008-08-20 2009-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 3985-1995 "asbestos rubber sheet." This standard compared with GB/T 3985-1995, the main changes are as follows. --- To Chapter 3, "Product grades and specifications" to "Classification and labeling", modify the "product flag", the abolition of product thickness provisions, The thickness deviation requirements placed in Chapter 4, and re-made provisions; --- The product "Conditions" to add a "non-oil, non-acid media," the statement; --- Increased "XB510" rating grades and quality requirements; --- For XB200 and above products increased "nitrogen leakage rate" quality requirements and test methods; --- The XB450 transverse tensile strength by the "≥19MPa" changed to "≥18MPa"; --- Use the "creep relaxation rate" instead of "stress relaxation rate," the specific content has not changed; --- The "Steam seal" to "heat pressure" of, test methods were fine-tuning; --- Cancel a thickness of 2.5mm or more (including 2.5mm) is not specified softness test; --- Modify the thickness measurement method; --- Transverse tensile strength test GB/T 20671.7 instead of GB/T 541; --- Increased aging coefficient test method, instead of the obsolete GB 3987 and later GB/T 541; --- Loss on ignition test GB/T 540 to replace obsolete GB 3986 and later GB/T 541; --- Compression rebound ratio testing GB/T 20671.2 Obsolete instead of GB 3988 and later GB/T 541, the diameter of the head 25mm to 6.4mm; --- Density test GB/T 22308 to replace obsolete GB 544 and subsequent GB/T 541; --- Canceled softness test method, GB/T 20671.8 substitute; --- Heat pressure resistance test GB/T 540 instead of GB/T 15520; --- The number of samples of each batch of test samples from the performance "at least one" to "three"; --- Canceled Appendix A "stress relaxation test method", replaced by GB/T 20671.5; --- Added Appendix A "grade rating of this product corresponds to the criteria listed in GB/T 20671.1 coding." Appendix A of this standard is an informative annex. The standard proposed by China Building Materials Federation. The standard and non-metallic mineral products by the National Standardization Technical Committee (SAC/TC406) centralized. This standard is drafted by. Xianyang Institute of non-metallic minerals. Participated in the drafting of this standard. Zhoushan seamounts sealed Material Co., Ltd., Chengdu Jun Ma sealed Products Co., Ltd. Hebei Hengda Sealing Material Co., Ltd., Jilin Province Haihong seal products. The main drafters of this standard. Shang Xingchun, Shi Zhongtang, HEZE Shen Xiaoping, IRON, Fan Guoliang, Li Baojin. This standard was first published in 1983, in 1995 conducted the first revision, this edition is the second amendment. Asbestos Rubber Sheet

1 Scope

This standard specifies the asbestos rubber sheet classification and marking requirements, test methods, inspection rules, marking, packaging, transportation and storage. This standard applies to chrysotile as reinforcing fibers, rubber binder, by roll forming heat pressure gasket used in the manufacture of Types of sheet metal. This sheet can also be made with reference to the use of the gasket.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 191 Packaging - Pictorial signs GB/T 540 Asbestos rubber sheet test method GB/T 2828.1 Sampling procedures for inspection - Part 1. by acceptance quality limit (AQL) retrieval batch inspection sampling plan GB/T 20671.1 Non-metallic gasket materials Classification system and test methods - Part 1. Non-metallic gasket materials classification system GB/T 20671.2 non-metallic materials Classification system and test methods - Part 2 gaskets. gasket materials compression spring rate test method GB/T 20671.4 Non-metallic gasket materials Classification system and test methods - Part 4. Test methods for sealing gasket materials GB/T 20671.5 Non-metallic gasket materials Classification system and test methods - Part 5. Test method for relaxation of gasket materials creep GB/T 20671.7 non-metallic materials Classification system and test methods - Part 7 Gasket. non-metallic gasket materials tensile strength test method GB/T 20671.8 non-metallic materials Classification system and test methods - Part 8 Gasket. non-metallic gasket materials softness test method GB/T 22308 Test method for sealing plate material density

3 Classification and Marking

3.1 Classification Asbestos rubber sheet is divided into seven rating grades as shown in Table 1. 3.2 mark Asbestos rubber sheet products according to any one of the following two methods labeling method for labeling. 3.2.1 Grades and grade of the product according to the standard numbering sequence tags. Tag example. asbestos rubber sheet, grade designation XB350, labeled. XB350-GB/T 3985. 3.2.2 labeled by the method of GB/T 20671.1 specified categories depending on the model and the physical and mechanical properties of the product. Table 1 asbestos rubber grades and grade recommended range Grade level surface color recommended range XB510 dark green temperature below 510 ℃, pressure 7MPa following non-oil, non-acid media XB450 purple temperature of 450 ℃ or less, the pressure 6MPa following non-oil, non-acid media XB400 purple temperature of 400 ℃ or less, the pressure 5MPa following non-oil, non-acid media ......

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