GB/T 13021-2023 English PDF

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GB/T 13021-2023: Polyolefin pipes and fittings - Determination of carbon black content - Test method of calcination and pyrolysis
Status: Valid

GB/T 13021: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 13021-2023	264	Add to Cart	3 days	Polyolefin pipes and fittings - Determination of carbon black content - Test method of calcination and pyrolysis	Valid
GB/T 13021-1991	169	Add to Cart	2 days	Determination for the carbon black content of polyethylene pipes and fittings by calcination and pyrolysis	Obsolete

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Basic data

Standard ID: GB/T 13021-2023 (GB/T13021-2023)
Description (Translated English): Polyolefin pipes and fittings - Determination of carbon black content - Test method of calcination and pyrolysis
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G33
Classification of International Standard: 83.140.30
Word Count Estimation: 14,164
Date of Issue: 2023-08-06
Date of Implementation: 2024-03-01
Older Standard (superseded by this standard): GB/T 13021-1991
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 13021-2023: Polyolefin pipes and fittings - Determination of carbon black content - Test method of calcination and pyrolysis

---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.
ICS 83.140.30 CCSG33 National Standards of People's Republic of China Replace GB/T 13021-1991 Polyolefin pipes and fittings Determination of Carbon Black Content Calcination and Pyrolysis Method Published on 2023-08-06 2024-03-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Table of contents

Preface III 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 Method Overview 1 5 Method A. Tube electric furnace method 2 5.1 Reagent 2 5.2 Instrument 2 5.3 Test step 2 5.4 Result calculation and presentation (Method A) 3 6 Method B. Box-type resistance furnace method (Method B1) or microwave muffle furnace method (Method B2) 3 6.1 Instrument 3 6.2 Test step 4 6.3 Calculation and presentation of results (Method B1 and Method B2) 5 7 Method C. Thermogravimetric Analyzer (TGA) 6 7.1 Instrument 6 7.2 Test step 6 7.3 Calculation and presentation of results (Method C) 7 8 Test report 8

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document replaces GB/T 13021-1991 "Determination of carbon black content in polyethylene pipes and fittings (thermal weight loss method)" and is consistent with Compared with GB/T 13021-1991, in addition to structural adjustments and editorial changes, the main technical changes are as follows. ---Changed the scope of application (see Chapter 1, Chapter 1 of the.1991 edition); ---Added method B and method C (see Chapter 6 and Chapter 7); --- Added requirements for balance and timer accuracy (see 5.2, 6.1); ---Added the requirements for the length of tubular electric furnaces and quartz tubes (see 5.2); --- Added state adjustment of the specimen (see 5.3.3); ---Changed the calcination temperature in the tubular electric furnace method (see 5.3.6, 5.3.5 of the.1991 edition). This document is equivalent to ISO 6964.2019 "Test Method for Determination of Carbon Black Content by Calcination and Pyrolysis of Polyolefin Pipes and Fittings". A "Terms and Definitions" chapter has been added to this document. This document has made the following minimal editorial changes. ---Change the name of the standard to "Determination of carbon black content in polyolefin pipes and fittings, calcining and pyrolysis method". Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by China Light Industry Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products (SAC/TC48). This document was drafted by. Beijing Technology and Business University, Construction Research Institute Testing Center Co., Ltd., AD Co., Ltd., Zhejiang Zhongcai Pipeline Technology Co., Ltd., Yada Plastic Products Co., Ltd., Langfang Beihua Polymer Materials Co., Ltd., Guangdong Liansu Technology Industrial Co., Ltd., Gu Di Technology Co., Ltd., Sinopec Shanghai Petrochemical Co., Ltd., Fujian Yatong New Material Technology Co., Ltd., Zhejiang Wei Xing New Building Materials Co., Ltd., Sinosteel Group Zhengzhou Metal Products Research Institute Co., Ltd., Nansu Building Materials Plastic Products (Shenzhen) Co., Ltd. Company, Shandong Shengbang Plastic Co., Ltd., Yangtze River Ecological Environmental Protection Group Co., Ltd. The main drafters of this document. Li Tianhua, Li Yan, Sun Huali, Wang Baiti, Li Yu, Wang Ning, Sun Xiuhui, Li Xiaodong, Quan Naijia, Peng Fudi, Tao Yuejie, Liu Zhe, Zhang Tianyou, Jing Faqi, Hui Erqing, Shen Chuanxi. The previous versions of this document and the documents it replaces are as follows. ---First published as GB/T 13021-1991 in.1991; ---This is the first revision. Polyolefin pipes and fittings Determination of Carbon Black Content Calcination and Pyrolysis Method

1 Scope

This document specifies the test methods for the determination of carbon black content in polyolefin pipes, pipe fittings and their raw materials, and provides a method suitable for polyethylene pipes. and pipe fittings basic methods. This document is applicable to the determination of carbon black content in polyolefin pipes, pipe fittings and their raw materials.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. polymers-Part 1.Generalprinciples] Note. GB/T 33047.1-2016 Thermogravimetric method for plastic polymers (TG) Part 1.General principles (ISO 11358-1.2014, MOD)

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Method overview

The carbon black content of the polyolefin sample was measured by the following method. ---Method A. Place the sample in a tubular electric furnace, pyrolyze with nitrogen flow at 550℃±50℃ for 45min, and then pyrolyze at 900℃±25℃ Calcination. ---Method B. Put the sample into a covered quartz crucible, place it in a box-type resistance furnace (commonly known as "muffle furnace") or microwave muffle furnace for calcination and Pyrolysis. The testing process is divided into two types based on the type of instrument used. ● Box-type resistance furnace method (Method B1). Heating from 325℃±25℃ to 550℃±25℃ at a certain heating rate, and Maintain 550℃±25℃ for 10min±0.5min for pyrolysis. After pyrolysis, it is calcined at 900℃±25℃. ●Microwave muffle furnace method (Method B2). After pyrolysis at 520℃±25℃ for 10min±0.5min, pyrolyze at 900℃±25℃ Calcination. ---Method C. Put the sample into a thermogravimetric analyzer (TGA), pass in inert gas, heat it up to 800°C at a certain rate for pyrolysis, and then Finally, the inert gas is switched to oxygen and calcined at 900°C. Note 1.Carbon black begins to oxidize in air or oxygen at 500°C. The quality loss of carbon black will occur between 500℃~700℃ in air or oxygen. Note 2.If the sample contains additives other than carbon black that can also decompose at 900°C, such as calcium carbonate, the measured carbon black content may exceed the actual value. actual value. If the ash content is greater than 1%, further verification is required. The carbon black content was calculated based on the mass difference before and after calcination and pyrolysis. ......

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