GB/T 39249-2020 English PDF

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GB/T 39249-2020: Rubber and plastics hoses and tubing. Textile-reinforced types. Sub-ambient temperature crush test
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39249-2020	94	Add to Cart	3 days	Rubber and plastics hoses and tubing. Textile-reinforced types. Sub-ambient temperature crush test	Valid

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Basic data

Standard ID: GB/T 39249-2020 (GB/T39249-2020)
Description (Translated English): Rubber and plastics hoses and tubing. Textile-reinforced types. Sub-ambient temperature crush test
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G42
Classification of International Standard: 23.040.70
Word Count Estimation: 5,525
Date of Issue: 2020-11-19
Date of Implementation: 2021-10-01
Quoted Standard: ISO 23529
Adopted Standard: ISO 28702-2008, IDT
Regulation (derived from): National Standard Announcement No. 26 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the test method for determining the low-temperature brittleness of fabric-reinforced rubber and plastic hoses and non-reinforced hoses by flattening hose samples. This standard only applies to hoses with a nominal inner diameter less than or equal to 100 mm.

GB/T 39249-2020: Rubber and plastics hoses and tubing. Textile-reinforced types. Sub-ambient temperature crush test

---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.
(Rubber and plastic hoses and non-reinforced hoses, fabric reinforced type, low temperature flattening test) ICS 23.040.70 G42 National Standards of People's Republic of China Rubber and plastic hoses and non-reinforced hoses Fabric reinforced low temperature flattening test 2020-11-19 released 2021-10-01 implementation State Administration for Market Regulation 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 uses the translation method equivalent to ISO 28702.2008 "Rubber and plastic hoses and non-reinforced hose fabric reinforced low temperature Flattening test. The Chinese documents that have a consistent correspondence with the international documents cited in this standard are as follows. ---GB/T 2941-2006 Rubber Physical Test Method General Procedure for Sample Preparation and Adjustment (ISO 23529.2004, IDT). This standard was proposed by the China Petroleum and Chemical Industry Federation. This standard is under the jurisdiction of the National Rubber and Rubber Products Standardization Technical Committee (SAC/TC35). Drafting organizations of this standard. Ruiyuan Rubber Products Co., Ltd., Shenyang Rubber Research and Design Institute Co., Ltd. The main drafters of this standard. Liu Huaixian, Wang Shuli, Liu Dingyuan, Wang Bao, Zhu Xianfu. Rubber and plastic hoses and non-reinforced hoses Fabric reinforced low temperature flattening test

1 Scope

This standard specifies the test for determining the low-temperature brittleness of fabric-reinforced rubber and plastic hoses and non-reinforced hoses by flattening hose samples. This standard only applies to hoses with a nominal inner diameter less than or equal to 100mm.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. ISO 23529 Rubber Physical Test Methods General Procedures for Sample Preparation and Adjustment

3 Principle

Flatten a hose sample to 50% of its inner diameter at the test temperature, and after the pressure is relieved, check whether there are cracks or other unusual phenomenon.

4 devices

4.1 Compression fixture or other appropriate device. consists of two large enough flat plates, which can squash the hose to 50% of its inner diameter. 4.2 Conditioning room. It can maintain the specific temperature selected in Chapter 6.

5 Sample

Take a circular sample of about 25mm from the hose to be tested.

6 Test temperature

The test should be carried out at one of the following temperatures or the low temperature specified by other relevant product standards. ---0℃±2℃; ----10℃±2℃; ----25℃±2℃; ----40℃±2℃; ----55℃±2℃. ......

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