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GB/T 35074-2018 English PDF (GBT35074-2018)

GB/T 35074-2018 English PDF (GBT35074-2018)

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GB/T 35074-2018: Impregnating coal pitch

This Standard specifies the technical requirements, test methods, inspection rules, packaging, storage, transport, quality certificate of impregnating coal pitch. This Standard is applicable to impregnating coal pitch for carbon material production.
GB/T 35074-2018
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 71.080
G 18
Impregnating coal pitch
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ISSUED ON. MAY 14, 2018
IMPLEMENTED ON. DECEMBER 01, 2018
Issued by. State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Technical requirements ... 5
4 Test methods ... 5
5 Inspection rules ... 6
6 Packaging, storage, transport, quality certificate ... 6
Impregnating coal pitch
1 Scope
This Standard specifies the technical requirements, test methods, inspection rules, packaging, storage, transport, quality certificate of impregnating coal pitch.
This Standard is applicable to impregnating coal pitch for carbon material production.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1999, Sampling method for coking oil products
GB/T 2000, Coking solid products. Sampling
GB/T 2288, Coking products - Determination of moisture content
GB/T 2291, Method for preparation of coal tar pitch specimens
GB/T 2292, Determination of toluene insoluble content for coking products GB/T 2293, Pitch products of coal carbonization - Determination of quinoline- insoluble
GB/T 2294, Solid products of coal carbonization - Determination of softening point
GB/T 2295, Determination of the ash content of coking solid products
GB/T 8170, Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 8727, Method for determination of coking value of coal pitch products GB/T 10454, Flexible freight container
provisions of GB/T 2288.
5 Inspection rules
5.1 Inspection and acceptance
The quality inspection and acceptance of impregnating coal pitch are performed by quality supervision department.
5.2 Batch
Impregnating coal pitch shall be submitted in batches for inspection, consisting of products of same grade.
5.3 Sampling and sample preparation
For each batch of products, impregnating coal pitch is sampled according to GB/T 1999. Solid asphalt is sampled according to GB/T 2000. After sampling, perform sample preparation according to GB/T 2291.
5.4 Determination of inspection results
5.4.1 The product grade is determined according to the indicators in Table 1. When any item failed, it shall double sampling and inspect the failed item. Only when all the inspection items pass, this batch of products are determined as qualified. If there is one item unqualified, this batch of products shall be determined as unqualified.
5.4.2 The determination of reference indicators and other items shall be determined by negotiation between the supplier and the purchaser.
5.4.3 The test result value shall be rounded off according to GB/T 8170. 6 Packaging, storage, transport, quality certificate
6.1 Packaging
Solid impregnating coal pitch products are generally packaged in bulk bags. The quality of the bulk bags shall meet the requirements of GB/T 10454. Liquid impregnating coal pitch products generally use tank storage. When the
purchaser has special requirements for product packaging, it may be
determined by the supplier and the purchaser through negotiation.
6.2 Storage
Impregnating coal pitch shall be stored in a dry, clean, ventilated environment.

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