GB 338-2011 PDF English
US$140.00 · In stock · Download in 9 secondsGB 338-2011: [GB/T 338-2011] Methanol for industrial use Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB 338: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 338-2011 | English | 140 |
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[GB/T 338-2011] Methanol for industrial use
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| GB 338-2004 | English | 399 |
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Methanol for industrial use
| Obsolete |
| GB 338-1992 | English | 319 |
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Methanol for industrial use
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GB 338-2011: [GB/T 338-2011] Methanol for industrial use---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB338-2011
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.080.60
G 16
Replacing GB 338-2004
Methanol for industrial use
Issued on. DECEMBER 05, 2011
Implemented on. AUGUST 01, 2012
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Requirements... 6
4 Test methods... 7
5 Inspection rules... 11
6 Marking, packaging, transportation and storage... 12
7 Safety... 12
Annex A (Informative) Contrast list between the chapters and articles
number in this Standard and those in ASTM D1152.2006... 14
Annex B (Normative) Calculation of the mass fraction of methanol... 15
Annex C (Informative) Correction calculation of full immersion
thermometer and mercury manometer... 16
Annex D (Normative) Determination of ethanol content in methanol for
industrial use – Gas chromatography... 17
Foreword
Provisions in Chapter 6.1 of this Standard are mandatory, and the others are
recommendatory.
This Standard is drafted according to the rules given in GB/T 1.1-2009.
This Standard replaces GB 338-2004 Industrial Methanol. Compared with GB 338-2004,
the main technical changes in this Standard are as follows.
— Modified the preparation method of this Standard colorimetric solution used for the
potassium permanganate time test (see Chapter 4.7 of this edition; and Chapter 4.4
of Edition 2004);
— Added the correction formula for the readings of the full immersion thermometer and
the mercury barometer used in the boiling range determination method (see Annex
C of this edition);
— Modified the test method for the determination of ethanol content (see Chapter 4.14,
Annex D of this edition; and Chapter 4.11 of Edition 2004);
— Modified the factory inspection items (see Chapter 5.1 of this edition; and Chapter
5.1 of Edition 2004).
Using re-drafting method, this Standard modifies-adopts the American Society for Testing
Materials standard ASTM D1152.2006 Methanol. Compared with ASTM D1152.2006,
there are adjustments on the structure. Annex A lists out the Contrast List between
chapter and article number in this Standard and ASTM D1152.2006.The technical
differences and their reasons between this Standard and the ASTM D1152.2006 are as
follows.
— Indicators are divided into superior products, first-class products and qualified
products (see Chapter 3.2). Which is determined based on the classification
guideline of the relevant industrial products in China;
— Added the water miscibility item and the ethanol content item (see Chapter 3.2).
This is to strictly control the product quality;
— The color scale, boiling range, acid or alkali and other indicators of the superior
products are better than those specified in ASTM D1152.2006 (see Chapter 3.2);
— In addition to the use of the method specified in the ASTM D1152.2006 for the
sulfuric acid washing test, other test methods all adopt the national standards for
products testing method of China (see Chapter 4).
This Standard was proposed by China Petroleum and Chemical Industry Federation.
This Standard shall be under jurisdiction of Branch of Organic Chemicals of National
Standardization Technical Committee of Chemical (SAC/TC 63/SC 2).
Drafting organization of this Standard. Sinopec Sichuan Vinylon Works Group.
Participating drafting organizations of this Standard. Shanghai Coking & Chemical
Corporation, Shaanxi Yulin Natural Gas Chemical Industry Co., Ltd., Jiangsu SOPO
(Group) Co., Ltd., Methanol Branch of Daqing Oilfield Chemicals Co., Ltd., Zhejiang Jinju
Chemical Co., Ltd. and Guizhou Yihua Chemical Industry Co., Ltd.
Main drafters of this Standard. Yan Hong, Pu Lijun, Li Bin, Zhai Li, Zhou Bing, Lu Jiayun,
Zeng Yan, Zhai Xiaoxia, Wang Shumei, Ge Lixin, Zhang Xueyong, Lan Yuandong, Yang
Hongmei.
The previous editions replaced by this Standard are as follows.
— GB 338-1964, GB 338-1976, GB 338-1985, GB 338-1992, GB 338-2004.
Methanol for Industrial Use
1 Scope
This Standard specifies the requirements, test methods, inspection rules, marking,
packaging, transportation, storage and safety of the methanol for industrial use.
This Standard applies to the methanol for industrial use compounded by coal, natural gas,
light oil and heavy oil as the materials.
Molecular formula. CH4O
Relative molecular mass. 32.042 (according to the international relative atomic mass in
2007)
2 Normative references
The articles contained in the following documents have become part of this Standard
when they are quoted herein. For the dated documents so quoted, all the modifications
(including all corrections) or revisions made thereafter shall be applicable to this Standard.
GB 190 Packing symbol of dangerous goods
GB/T 601 Chemical reagent - Preparations of standard volumetric solutions
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods
(GB/T 603-2002, ISO 6353-1.1982, NEQ)
GB/T 3143 Color determination method of liquid chemicals (Hazen unit;
Platinum-cobalt scale)
GB/T 4472 Determination of density and relative density for chemical products
GB/T 6283 Chemical products - Determination of water Karl ·fischer method (general
method) (GB/T 6283-2008, ISO 760.1978, NEQ)
GB/T 6324.1 Test method of organic chemical products - Part 1.Water miscibility test
of liquid organic chemical products
GB/T 6324.2 Test method of organic chemical products - Part 2.Determination of dry
residue after evaporation on a water bath for volatile organic liquids (GB/T
6324.2-2004, ISO 759.1981, MOD)
GB/T 6324.3-2011 Test method of organic chemical products - Part 3.Determination of
permanganate-reducing substances
GB/T 6324.5-2008 Test method of organic chemical products - Part 5.Determination of
trace quantities of carbonyl compounds in organic chemicals
3 Requirements
3.1 Character. Colorless clear liquid, without peculiar smell and odor, and without visible
impurities.
3.2 Methanol for industrial use shall meet the technical requirements shown in Table 1.
4 Test methods
4.1 Warning
Some processes specified by the test method may lead to dangerous situations, so
the operator shall take appropriate safety and protective measures.
4.2 General provisions
Unless otherwise specified, only confirmed analytically pure reagent and Grade-3 water
met the GB/T 6682 are used in the analysis.
If there is no other requirements noted, the standard titration solution, preparations and
products used in the analysis shall be prepared in accordance with provisions of GB/T 601
and GB/T 603.
4.6 Determination of boiling range
It shall be conducted according to the method specified in GB/T 7534.Distillation flask is
of 100mL; indication range of the thermometer is 50°C - 70°C, with the division value of
0.1°C. For the correction of the full immersion thermometers and mercury manometer, see
Annex C.
4.10 Determination of acid or alkali content
4.10.1 Method summary
The specimen is diluted by water that does not contain carbon dioxide, with the
bromothymol blue as indicator;
4.10.4 Analytical procedures
4.11 Determination of carbonyl compounds content
It shall be conducted according to the specified provisions of 4.2 in GB/T 6324.5-2008.
Wherein the wavelength is 430 nm; Mass fraction w2 of carbonyl compounds [calculated
by formaldehyde (HCHO)], the value is expressed in %, calculated according to Equation
(3).
4.14 Determination of ethanol content
It shall be conducted according to the method specified in Annex D.
5 Inspection rules
5.1 All items listed in this Standard are type inspection items, of which color scale, density,
boiling range, potassium permanganate test, moisture and acid (or alkali) are factory
inspection items. Under the normal production situation, type inspection shall be
conducted at least for one time in every month.
5.2 Methanol for industrial use shall be inspected by the mass inspection department.
The manufacturer ensures that the manufactured methanol for industrial use complies
with the requirements of this Standard.
5.3 Under the condition that raw materials and process are not changed, the actual batch
of continuously produced products is deemed as a group-batch; however, the time of
several group-batches constituting an inspection batch is usually less than one week.
6 Marking, packaging, transportation and storage
6.1 Packaging containers of methanol for industrial use shall be coated with firm
marking, with the contents including manufacturer name, product name, this
Standard number, and the “Flammable Liquid” and “Poisonous Substance”
marking specified by GB 190.
6.2 The methanol for industrial use shall be packaged with clean and dry containers, and
packaging containers shall be strictly sealed.
6.4 The methanol for industrial use shall be stored dry, ventilated and cool places which
are away from sun exposure, heat and fire.
7 Safety
7.1 Warning against danger. Methanol is a kind of colorless, flammable liquid with a flash
point of 8°C, auto-ignition temperature of 436°C. The volume fraction of explosion range
in air for the methanol vapor is 6% - 36.5%. Methanol vapor has stimulation on nervous
system, if inhaled;
7.2 Safety measures. Wash with water immediately if methanol spills out. When
methanol catches fire, put out fire with sand, foam extinguisher, asbestos cloth, etc.. Avoid
methanol contact with skin;
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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