GB/T 7702.3-2008 PDF English
US$70.00 · In stock · Download in 9 secondsGB/T 7702.3-2008: Test method for granular activated carbon from coal -- Determination of hardness Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 7702.3: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 7702.3-2008 | English | 70 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Test method for granular activated carbon from coal -- Determination of hardness
| Valid |
| GB/T 7702.3-1997 | English | 190 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Standard test method for granular activated carbon from coal--Determination of hardness
| Obsolete |
| GB/T 7702.3-1987 | English | RFQ |
ASK
|
3 days
|
Standard test method for hardness of granular activated carbon from coal
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 7702.3-2008
GB/T 7702.3-2008: Test method for granular activated carbon from coal -- Determination of hardness---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/GBT7702.3-2008
GB
ICS 75.160.10
D 24
NATIONAL STANDARD
Replacing GB/T 7702.3-1997
Test Method for Granular Activated Carbon from
Coal - Determination of Hardness
Issued on. NOVEMBER 20, 2008
Implemented on. MAY 1, 2009
Jointly Issued by. General Administration of Quality Supervision,
Inspection and Quarantine (AQSIQ);
Standardization Administration (SAC) of the People's
Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Principle... 5
3 Instruments and Equipment... 5
4 Sample Preparation... 6
5 Determination Procedure... 7
6 Result Calculation... 7
7 Precision... 7
8 Test Report... 8
Foreword
GB/T 7702 "Test Method for Granular Activated Carbon from Coal" is divided into.
— Part 1.Determination of Moisture;
— Part 2.Determination of Particle Size;
— Part 3.Determination of Hardness;
— Part 4.Determination of Packing Density;
— Part5.Determination of Absorption of Water;
— Part 6.Determination of Methylene Blue Absorption;
— Part 7.Determination of Iodine Number;
— Part 8.Determination of Phenol Absorption;
— Part 9.Determination of Ignition Temperature;
— Part 10.Determination of Service Life against Benzene and Chloroethane
Vapors;
— Part 13.Determination of CCL4 Vapor Absorption;
— Part14.Determination of Sulphur Capacity;
— Part 15.Determination of Ash Content;
— Part 16.Determination of pH Value;
— Part 17.Determination of Floatation Ratio;
— Part 18.Determination of Caramel Absorption;
— Part 19.Determination of Carbon Tetrachloride (CCl4) Desorption;
— Part 20.Determination of Pore Volume and Specific Surface Area.
This Part is part 3 of GB/T 7702.
This Part modifies and adopts ASTM D 3802.1979 "Standard Test Method for
Ball-Pan Hardness of Activated Carbon" (reconfirmed in 2005). Compared with ASTM
D 3802.1979, the major technical differences are as follows.
a) The volume of sample is adjusted to 50mL;
b) The sample wearing method is changed to ball-milling method;
c) Technical requirements of hardness tester are added.
This Part replaces GB/T 7702.3-1997 "Standard Test Method for Hardness of
Granular Activated Carbon from Coal – Determination of Hardness".
Compared with GB/T 7702.3-1997, the main changes of this Part are as follows.
a) Structure of this standard is adjusted according to GB/T 1.1-2000 "Directives
for Standardization - Part 1.Rules for the Structure and Drafting of Standards"
and GB/T 20001.4-2001 "Rules for Drafting Standards - Part 4.Methods of
Chemical Analysis";
b) This revision combines the ASTM standard ASTM D 3802.1979 "Standard Test
Method for Ball-Pan Hardness of Activated Carbon" (reconfirmed in 2005) with
the actual situation of China.
c) The volume of sample is adjusted to 50mL;
d) The sample wearing method is changed to ball-milling method;
e) Technical requirements of hardness tester are added.
This Part was proposed by and shall be under the jurisdiction of China North
Industries Group Corporation.
Drafting organization of this Part. Shanxi Xinhua Chemicals Co., Ltd.
Chief drafting staffs of this Part. Zhang Xu, Li Weibing, Yuan Yidong, Zhao Honghai,
Zhao Jijun, Chi Guangxiu, and Li Ruomei.
The historical editions replaced by this Part are as follows.
— GB/T 7702.3-1987, and GB/T 7702.3-1997.
Test Method for Granular Activated Carbon from Coal -
Determination of Hardness
1 Scope
This Part specifies the contents such as determination principle, determination
procedure and result calculation of the granular activated carbon from coal.
This Part is applicable to the determination of hardness of granular activated carbon
from coal (hereinafter referred to as activated carbon).
2 Principle
Under specified conditions, the sample is placed in a roller with a number of stainless
steel balls. Through mechanical rotation, the sample is worn. Determine the changing
conditions of the particle size of worn sample. Use the percentage OF the sample
mass retained on the test sieve TO the original sample mass AS the sample
hardness.
3 Instruments and Equipment
3.1 Hardness tester (see Figure 1). The roller speed of the hardness tester is
50r/min±2/min.
3.4 Test sieve. With φ200×50 - X/X square holes.
3.5 Balance. Sensibility is 0.1g.
3.6 Timer. The division value is 5s.
3.7 Electrothermal constant-temperature drying box. 0°C~300°C.
3.8 Dryer. Filled with anhydrous calcium chloride or allochroic silicagel.
3.9 Measuring cylinder. 50mL.
3.10 Brush. Ordinary bristle brush.
4 Sample Preparation
4.1 Adopt quartering method to take about 200mL of sample. Place the sample into
the 150°C±5°C electrothermal constant-temperature drying box and dry for 2h
(samples whose moisture meets the product requirements do not need to be dried).
Then take out the sample and place it into the dryer for cooling and later use.
5 Determination Procedure
5.1 Take 50mL of screened sample with the measuring cylinder. Weigh it on the
balance, accurate to 0.1g.
5.2 Place the weighed sample into the roller with 5 steel balls in it. Tighten the roller
cover and place the roller on 2 rotating shafts of the hardness tester.
5.3 Start the hardness tester and start the timer at same time. Run for 5min.
5.4 Take down the roller. Take out the steel balls (the sample must not be brought
out). Transfer the sample onto the selected test sieve.
6 Result Calculation
Hardness is measured by mass fraction w. The value is expressed in % and is
calculated according to Formula (1).
7 Precision
7.1 Two parallel determinations of the specimen shall be made for each sample. The
result is expressed by the arithmetic mean. Calculation result is accurate to the
integer.
8 Test Report
The test report shall include the following contents.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 7702.3-2008 be delivered?Answer: The full copy PDF of English version of GB/T 7702.3-2008 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 7702.3-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 7702.3-2008_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 7702.3-2008 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB/T 7702.3-2008?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7702.3-2008 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. How to buy and download a true PDF of English version of GB/T 7702.3-2008?A step-by-step guide to download PDF of GB/T 7702.3-2008_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 7702.3-2008".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|