Programme of work

BUREAU OF INDIAN STANDARDS

Petroleum, Coal and Related Products Department

Programme of Work

PCD7 : Solid Mineral Fuels and Solid Biofuels

Scope : To formulate Indian Standards for a) Terminology, methods of sampling and test, codes of practice, classification by size and type, petrographic analysis and specification for solid mineral fuel b) Terminology, methods of sampling and test, codes of practice, classification and specification for raw and processed materials originating from arboriculture, agriculture, aquaculture, horticulture and forestry to be used as a source for solid bio-fuels.
Liaison :

ISO/TC 238 - Solid biofuels - Participating (P)
ISO/TC 238/TG 1 - Biocarbon
ISO/TC 27 - Coal and coke - Participating (P)
ISO/TC 27/SC 1 - Coal preparation: Terminology and performance - Participating (P)
ISO/TC 27/SC 3 - Coke - Participating (P)
ISO/TC 27/SC 4 - Sampling - Participating (P)
ISO/TC 27/SC 5 - Methods of analysis - Participating (P)
ISO TC 238/WG 1 - Terminology
ISO TC 238/WG 2 - Fuel specifications and classes
ISO TC 238/WG 4 - Physical and mechanical test methods
ISO TC 238/WG 5 - Chemical test methods
ISO TC 238/WG 6 - Sampling and sample preparation
ISO TC 238/WG 7 - Safety of solid biofuels

Published Standards

SI. No.	IS No.	Title	Reaffirmation Details	No. of Amendments	Degree of Equivalence
1.	IS 12770:2025	Coal for Cement Manufacture - Specification (First Revision)		-	Indigenous
2.	IS 12770:1989 Reviewed In : 2020	Coal for cement manufacture - Specification	May, 2020	-	Indigenous
3.	IS 12891:2021	Determination of fusibility of ash from coal, coke and lignite (First Revision)		-	Not Equivalent
4.	IS 1350 (Part 1):1984 Reviewed In : 2023	Methods of test for coal and coke : Part 1 proximate analysis (Second Revision)	September, 2023	1	Indigenous
5.	IS 1350 (Part 1):2025	Coal and Coke - Methods of Test Part 1 Proximate Analysis (Third Revision)		-	Indigenous
6.	IS 1350 (Part 2):2022 ISO 1928 : 2020	Method of test for coal and coke : Part 2 determination of gross calorific value (Third Revision)		-	Identical under dual numbering
7.	IS 1350 (Part 3):2022 ISO 334 : 2020	Methods of test for coal and coke : Part 3 determination of total sulphur - Eschka method (Second Revision)		-	Identical under dual numbering
8.	IS 1350 (Part 4/Sec 1):2024	Coal and coke - Methods of test : Part 4 ultimate analysis, Section 1 determination of carbon and hydrogen (Second Revision)		-	Indigenous
9.	IS 1350 (Part 4/Sec 2):2025	Coal and Coke - Methods of Test Part 4 Ultimate Analysis Section 2 Determination of Nitrogen (Second Revision)		-	Indigenous
10.	IS 1350 (Part 4/Sec 2):1975 Reviewed In : 2020	Methods of test for coal and coke : Part 4 ultimate analysis, Section 2 determination of nitrogen (First Revision)	May, 2020	2	Indigenous
11.	IS 1350 (Part 5):2017 Reviewed In : 2021	Methods of test for coal and coke : Part 5 determination of special impurities (carbon present as carbonate, chlorine and phosphorus) (Second Revision)	May, 2021	-	Indigenous
12.	IS 1353 (Part 1):2018 Reviewed In : 2023	Method of test for coal carbonization : Part 1 determination of the crucible swelling number (Second Revision)	September, 2023	-	Identical under dual numbering
13.	IS 1353 (Part 2):2018 Reviewed In : 2023	Method of test for coal carbonization : Part 2 determination of caking power - Gray - King coke test (Second Revision)	September, 2023	-	Identical under dual numbering
14.	IS 1353 (Part 3):2022 ISO 15585 : 2019	Method of test for coal carbonization : Part 3 determination of caking index (Second Revision)		-	Identical under dual numbering
15.	IS 1354:2024	Coke - Methods of test - Special tests (Third Revision)		-	Indigenous
16.	IS 1355:1984 Reviewed In : 2023	Methods of determination of the chemical composition of ash of coal and coke (First Revision)	September, 2023	1	Indigenous
17.	IS 1355:2025	Coal and Coke - Determination of chemical composition of ash (Second Revision)		-	Indigenous
18.	IS 13758 (Part 1):1993 Reviewed In : 2025	Coal tar pitch - Methods of test : Part 1 determination of matter insoluble in quinoline	July, 2025	-	Indigenous
19.	IS 13758 (Part 2):1993 Reviewed In : 2025	Coal tar pitch - Methods of test : Part 2 determination of coking value	July, 2025	-	Indigenous
20.	IS 13810:2023	Code of practice for float and sink analysis of coal (First Revision)		-	Indigenous
21.	IS 15438:2004 ISO 157 Reviewed In : 2020	Coal - Determination of forms of sulphur	May, 2020	-	Identical under dual numbering
22.	IS 15441:2004 ISO 625 Reviewed In : 2020	Solid mineral fuels - Determination of carbon and hydrogen - Liebig method	May, 2020	-	Identical under dual numbering
23.	IS 15807 (Part 1):2008 Reviewed In : 2020	Methods of petrographic analysis of lignite : Part 1 definition of terms relating to petrographic analysis of lignite	January, 2020	-	Indigenous
24.	IS 16143 (Part 1):2021 ISO 13909 -1:2016	Hard coal and coke - Mechanical sampling : Part 1 general introduction (First Revision)		-	Identical under dual numbering
25.	IS 16143 (Part 2):2021 ISO 13909-2:2016	Hard coal and coke - Mechanical sampling : Part 2 coal - Sampling from moving streams (First Revision)		-	Identical under dual numbering
26.	IS 16143 (Part 3):2021 ISO 13909-3:2016	Hard coal and coke - Mechanical sampling : Part 3 coal - Sampling from stationary lots (First Revision)		-	Identical under dual numbering
27.	IS 16143 (Part 4):2021 ISO 13909-4 : 2016	Hard coal and coke - Mechanical sampling : Part 4 coal - preparation of test samples (First Revision)		-	Identical under dual numbering
28.	IS 16143 (Part 5):2021 ISO 13909-5 : 2016	Hard coal and coke - Mechanical sampling : Part 5 coke - Sampling from moving streams (First Revision)		-	Identical under dual numbering
29.	IS 16143 (Part 6):2021 ISO 13909-6 : 2016	Hard coal and coke - Mechanical sampling : Part 6 coke - preparation of test samples (First Revision)		-	Identical under dual numbering
30.	IS 16143 (Part 7):2021 ISO 13909-7 : 2016	Hard coal and coke - Mechanical sampling : Part 7 methods for determining the precision of sampling, sample preparation and testing (First Revision)		-	Identical under dual numbering
31.	IS 16143 (Part 8):2021 ISO 13909-8 : 2016	Hard coal and coke - Mechanical sampling : Part 8 methods of testing for bias (First Revision)		-	Identical under dual numbering
32.	IS 16196:2015 ISO 609 : 1996 Reviewed In : 2020	Solid mineral fuels - Determination of carbon and hydrogen - High temperature combustion method	May, 2020	-	Identical under dual numbering
33.	IS 16609:2018 ISO 19579 : 2012 Reviewed In : 2023	Solid mineral fuels - Determination of sulphur by IR spectrometry	September, 2023	1	Identical under dual numbering
34.	IS 16610:2022 ISO 10329 : 2017	Coal - Determination of plastic properties - Constant-torque gieseler plastometer method (First Revision)		-	Identical under dual numbering
35.	IS 16611:2022 ISO 20904 : 2020	Hard coal - Sampling of slurries (First Revision)		-	Identical under dual numbering
36.	IS 16612:2018 ISO 29541 : 2010 Reviewed In : 2023	Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen content - Instrumental method	September, 2023	-	Identical under dual numbering
37.	IS 16616:2022 ISO 349 : 2020	Hard coal - Audibert-arnu dilatometer test (First Revision)		-	Identical under dual numbering
38.	IS 16617:2018 ISO 9931 : 1991 Reviewed In : 2023	Coal - Sampling of pulverized coal conveyed by gases in direct fired coal systems	September, 2023	-	Identical under dual numbering
39.	IS 16618:2017 Reviewed In : 2021	Determination of ten race elements in coal, coke, lignite and fly ash by flame atomic absorption spectroscopic method	May, 2021	-	Not Equivalent
40.	IS 16721 (Part 1):2018 Reviewed In : 2023	Method of test for coal : Part 1 determination of total mercury content by atomic absorption spectrometry	September, 2023	-	Not Equivalent
41.	IS 16721 (Part 2):2018 Reviewed In : 2023	Method of test for coal : Part 2 determination of arsenic and selenium - Eschka's mixture and hydride generation/atomic absorption spectrometry	September, 2023	-	Not Equivalent
42.	IS 17073:2019 Reviewed In : 2023	Determination of major elements in coal and coke ash by x-ray fluorescence spectroscopic method	September, 2023	-	Not Equivalent
43.	IS 17378:2021	Test method for determination of major elements in ash from coal and coke by flame atomic absorption spectroscopic method		-	Indigenous
44.	IS 17642:2021 ISO 17828 : 2015	Solid biofuels - Determination of bulk density		-	Identical under dual numbering
45.	IS 17643:2021 ISO 17829 : 2015	Solid biofuels - Determination of length and diameter of pellets		-	Identical under dual numbering
46.	IS 17653:2021 ISO 18122 : 2015	Solid biofuels - Determination of ash content		-	Identical under dual numbering
47.	IS 17654:2021 ISO 18125 : 2017	Solid biofuels - Determination of calorific value		-	Identical under dual numbering
48.	IS 17655:2021 ISO 18134 -1 : 2015	Solid biofuels - Determination of moisture content - Oven dry method : Part 1 total moisture - Reference method		-	Identical under dual numbering
49.	IS 17655 (Part 1):2025 ISO 18134-1 : 2022	Solid Biofuels Determination of Moisture Content Part 1 Reference Method (First Revision )		-	Identical under dual numbering
50.	IS 17655 (Part 2):2021 ISO 18134-2 : 2017	Solid biofuels - Determination of moisture content - Oven dry method : Part 2 total moisture - Simplified method		-	Identical under dual numbering
51.	IS 17655 (Part 3):2025 ISO 18134-3 : 2023	Solid Biofuels - Determination of Moisture Content Part 3 Moisture in General Analysis Sample (First Revision)		-	Identical under dual numbering
52.	IS 17655:2021 ISO 18134-3 : 2015	Solid biofuels - Determination of moisture content - Oven dry method : Part 3 moisture in general analysis sample		-	Identical under dual numbering
53.	IS 17656:2021 ISO 18846 : 2016	Solid biofuels - Determination of fines content in samples of pellets		-	Identical under dual numbering
54.	IS 17820:2022 ISO 622 : 2016	Solid mineral fuels - Determination of phosphorus content - Reduced molybdophosphate photometric method		-	Identical under dual numbering
55.	IS 17832:2022 ISO 16948 : 2015	Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen		-	Identical under dual numbering
56.	IS 17833:2022 ISO 16994 : 2016	Solid biofuels - Determination of total content of sulfur and chlorine		-	Identical under dual numbering
57.	IS 17834:2022 ISO 16995 : 2015	Solid biofuels - Determination of the water soluble chloride, sodium and potassium content		-	Identical under dual numbering
58.	IS 17844:2025 ISO 18123 : 2023	Solid Biofuels - Determination of Volatile Matter ( First Revision)		-	Identical under dual numbering
59.	IS 17844:2022 ISO 18123 : 2015	Solid biofuels - Determination of the content of volatile matter		-	Identical under dual numbering
60.	IS 18557 (Part 1):2024 ISO 17831-1	Solid biofuels - Determination of mechanical durability of pellets and briquettes : Part 1 pellets		-	Identical under dual numbering
61.	IS 18557 (Part 2):2024 ISO 17831-2	Solid biofuels - Determination of mechanical durability of pellets and briquettes : Part 2 briquettes		-	Identical under dual numbering
62.	IS 18640:2024	Solid Biofuels - Sample Preparation		-	Not Equivalent
63.	IS 18721:2024	Solid Biofuels ï¿½ Vocabulary		-	Not Equivalent
64.	IS 18724:2024	Solid biofuels - Fuel specifications and classes - Pellets from agro and herbaceous residues		-	Not Equivalent
65.	IS 18725:2024	Solid biofuels - Fuel specifications and classes - Briquettes from agro and herbaceous residues		-	Not Equivalent
66.	IS 19139:2025 ISO 16967 : 2015	Solid Biofuels ï¿½ Determination of Major Elements ï¿½ Al, Ca, Fe, Mg, P, K, Si, Na and Ti		-	Identical under dual numbering
67.	IS 19158:2025 ISO 16968 : 2015	SOLID BIOFUELS - DETERMINATION OF MINOR ELEMENTS		-	Identical under dual numbering
68.	IS 212:2021	Crude coal tar for general use (Third Revision)		-	Indigenous
69.	IS 216:2006 Reviewed In : 2021	Coal tar pitch - Specification (Second Revision)	April, 2021	-	Indigenous
70.	IS 218:1983 Reviewed In : 2023	Specification for creosote oil for use as wood preservatives (Second Revision)	September, 2023	1	Indigenous
71.	IS 3746:2018 Reviewed In : 2023	Graphical symbols for coal preparation plant (Second Revision)	September, 2023	-	Not Equivalent
72.	IS 3810 (Part 1):2002 Reviewed In : 2020	Solid mineral fuels - Vocabulary : Part 1 terms relating to coal preparation (Second Revision)	May, 2020	-	Not Equivalent
73.	IS 3810 (Part 2):2003 ISO 1213-2 Reviewed In : 2020	Solid mineral fuels - Vocabulary : Part 2 terms relating to sampling, testing and analysis (First Revision)	May, 2020	-	Indigenous
74.	IS 3810 (Part 3):2023	Glossary of terms relating to solid mineral fuels : Part 3 - Coke		-	Indigenous
75.	IS 4023:2022 ISO 18894 : 2018	Methods for the determination of coke reactivity index (CRI) and coke strength after reaction (CSR) (Second Revision)		-	Identical under dual numbering
76.	IS 4286:2024	Domestic Coke - Specification (Second Revision)		-	Indigenous
77.	IS 4311:2024 ISO 602 : 2015	Coal - Determination of mineral matter (First Revision)		-	Identical under dual numbering
78.	IS 436 (Part 1/Sec 1):2024	Methods for Sampling of Coal and Coke Part 1 Sampling of Coal Section 1 Manual Sampling (Second Revision)		-	Indigenous
79.	IS 437:2020	Size analysis of coal and coke for marketing (Fourth Revision)	-	-	Indigenous
80.	IS 439:2020	Industrial Coke - Specification (Fourth Revision)	-	-	Indigenous
81.	IS 4433:1979 Reviewed In : 2020	Method for determination of hardgrove grindability index of coal (First Revision)	May, 2020	-	Indigenous
82.	IS 5062 (Part 1):1969 Reviewed In : 2020	Methods of test for brown coals and lignites : Part 1 determination of moisture content by the direct volumetric method	May, 2020	-	Indigenous
83.	IS 5062 (Part 2):1969 Reviewed In : 2020	Methods of test for brown coals and lignites : Part 2 determination of ash	May, 2020	-	Indigenous
84.	IS 5062 (Part 3):2022 ISO 647 : 2017	Methods of test for brown coals and lignite : Part 3 determination of the yields of tar water gas and coke residue by low temperature distillation (Second Revision)		-	Identical under dual numbering
85.	IS 5062 (Part 4):2018 ISO 975 : 2013 Reviewed In : 2023	Method of test for brown coals and lignites : Part 4 determination of yield of benzene-soluble extract - Semi-automatic method (Second Revision)	September, 2023	-	Identical under dual numbering
86.	IS 5062 (Part 4):2025 ISO 975:2021	Brown Coal and Lignite - Methods of Test Part 4 Determination of Yield of Benzene-Soluble Extract - Semi- Automatic Method (Third Revision)		-	Identical under dual numbering
87.	IS 5062 (Part 5):2018 ISO 1017 : 2006 Reviewed In : 2023	Methods of test for brown coals and lignites : Part 5 determination of acetone-soluble material (Resinous Substance) in the benzene-soluble extract (Second Revision)	September, 2023	-	Identical under dual numbering
88.	IS 5062 (Part 6):2017 ISO 5072 : 2013 Reviewed In : 2021	Methods of test for brown coals and lignites : Part 6 determination of true relative density and apparent relative density	May, 2021	-	Identical under dual numbering
89.	IS 5062 (Part 6):2025 ISO 5072 : 2021	Brown Coal and Lignite - Methods of Test: Part 6 Determination of True Relative Density and Apparent Relative Density (First Revision)		-	Identical under dual numbering
90.	IS 5062 (Part 7):2024 ISO 5073 : 2021	Brown coals and lignites - Methods of test : Part 7 determination of humic acids (First Revision)		-	Identical under dual numbering
91.	IS 5062 (Part 8/Sec 1):2018 Reviewed In : 2023	Methods of test for brown coals and lignites : Part 8 determination of moisture content, Section 1 indirect gravimetric method for total moisture	September, 2023	-	Identical under dual numbering
92.	IS 5062 (Part 8/Sec 2):2018 ISO 5068-2 : 2007 Reviewed In : 2023	Methods of test for brown coals and lignites : Part 8 determination of moisture content, Section 2 indirect gravimetric method for moisture in the analysis smaple	September, 2023	-	Identical under dual numbering
93.	IS 5209:2002 ISO 924 Reviewed In : 2020	Coal preparation plant - Principles and conventions for flowsheets (First Revision)	May, 2020	-	Identical under dual numbering
94.	IS 5451:2001 Reviewed In : 2023	Glossary of terms relating to coal carbonization products (First Revision)	September, 2023	-	Not Equivalent
95.	IS 6345:1996 Reviewed In : 2023	Methods of sampling of coal for float and sink analysis (First Revision)	September, 2023	-	Not Equivalent
96.	IS 7190 (Part 1):2024 ISO 567 : 2021	Coke - Methods of test : Part 1 determination of bulk density in a small container (Second Revision)		-	Identical under dual numbering
97.	IS 7190 (Part 2):2022 ISO 1013 : 2020	Coke - Methods of test : Part 2 determination of bulk density in a large container (Second Revision)		-	Identical under dual numbering
98.	IS 770:2013 Reviewed In : 2023	Classification and codification of indian coals, lignites and semi-anthracites (Third Revision)	September, 2023	-	Indigenous
99.	IS 7929:1975 Reviewed In : 2020	Methods for determination of electrical resistivity of chemical coke	May, 2020	-	Indigenous
100.	IS 9127 (Part 1):2022 ISO 7404-1 : 2016	Methods of petrographic analysis of coal : Part 1 definition of terms relating to petrographic anaysis of coal (Second Revision)		-	Identical under dual numbering
101.	IS 9127 (Part 2):2014 ISO 7404-2 : 2009 Reviewed In : 2020	Methods for petrographic analysis of coals : Part 2 methods of preparing coal samples (Second Revision)	January, 2020	-	Identical under dual numbering
102.	IS 9127 (Part 3):2002 ISO 7404-3 Reviewed In : 2020	Methods for the petrographic analysis of bituminous coal and anthracite : Part 3 method of determining maceral group composition (First Revision)	May, 2020	-	Identical under dual numbering
103.	IS 9127 (Part 4):2022 ISO 7404-4 : 2017	Methods for petrographic anaysis of coal : Part 4 method of determining microlithotype carbominerite and minerite composition (First Revision)		-	Identical under dual numbering
104.	IS 9127 (Part 5):2004 ISO 7404-5 Reviewed In : 2020	Methods for the petrographic analysis of bituminous coal and anthracite : Part 5 method of determining microscopically the reflectance of vitrinite (First Revision)	May, 2020	-	Identical under dual numbering
105.	IS 9912:1981 Reviewed In : 2025 Decision taken to Reaffirm and Archive	Coal tar based coating material and primers for protecting iron or steel pipelines - Specification (First Revision)	July, 2025	-	Indigenous
106.	IS 9949:2025	Abrasive Properties of Coal and Associated Minerals - Methods of test (Second Revision)		-	Indigenous
107.	IS 9949:1986 Reviewed In : 2020	Methods of test for abrasive properties of coal and associated minerals (First Revision)	May, 2020	-	Indigenous

Standards Under Develpoment

Projects Approved

SI. No.	Doc No	TITLE
No Records Found

Preliminary Draft Standards

SI. No.	Doc No	TITLE
1	PCD 7 (28848)	SOLID BIOFUELS SAFE HANDLING AND STORAGE

Drafts Standards in WC Stage

SI. No.	Doc No	TITLE
1	PCD 7 (28862) Revision of: IS 17656:2021	Solid Biofuels - Determination of Fines Content In Pellets First Revision
2	PCD 7 (28866) Revision of: IS 16610:2022	Hard Coal - Determination of Plastic Properties Constant-Torque Gieseler Plastometer Method Second Revision
3	PCD 7 (28871) Revision of: IS 17655:2021	Solid Biofuels Determination of Moisture Content Part 2 Simplified Method First Revision

Draft Standards Completed WC Stage

SI. No.	Doc No	TITLE
1	PCD 7 (25095) Revision of: IS 17653:2021	Solid Biofuels Determination of Ash Content First Revision
2	PCD 7 (28265) Revision of: IS 4433:1979	Coal - Determination of Hardgrove Grindability Index Second Revision
3	PCD 7 (28817) Revision of: IS 5209:2002	COAL PREPARATION PLANT PRINCIPLES AND CONVENTIONS FOR FLOWSHEETS Second Revision
4	PCD 7 (28823) Revision of: IS 5062:2018	BROWN COALS AND LIGNITES METHODS OF TEST PART 8 DETERMINATION OF MOISTURE CONTENT SECTION 2 INDIRECT GRAVIMETRIC METHOD FOR MOISTURE IN THE ANALYSIS SAMPLE First Revision

Finalized Draft Indian Standard

SI. No.	Doc No	TITLE
No Records Found

Finalized Draft Indian Standards under Print

SI. No.	Doc No	TITLE
1	PCD 7 (25223)	Solid Biofuels Sampling

Total Published Standards:89 Total Standards Under development : 9

Aspect Wise Report

Product:	9
Code of Practices :	1
Methods of Test :	63
Terminology :	7
Dimensions :	1
System Standard :	0
Safety Standard :	0
Others :	16
Service Specification :	0
Process Specification :	0
Unclassified :	0

Total :97

Annexure-I :List of Indian Standards Withdrawn/Superseded

SI. No.	IS No.	Title
1.	IS 1272:1958 Reviewed In : 2005	Coal Tar Solvent Naphtha Light Grade 2
2.	IS 1351:1959	Methods of Test for Coal Coke Ultimates Analysis
3.	IS 1352:1959	Methods of Test for Coal and Coke Ultimate Analysis
4.	IS 1421:1964	Cellulose Nitrate Coated Fabrics
5.	IS 15439:2000 Reviewed In : 2005	Hard Coal - Determination of Oxygen Content
6.	IS 15440:2004	Coal - Sampling of Pulverized Coal Conveyed by Gases in Direct Fired Coal Systems
7.	IS 213:1968	Coal-based naphtha superseding IS 214 AND IS 1272
8.	IS 214:1958	Coal Tar Solvent Naphtha Heavy
9.	IS 215:1995 Reviewed In : 2016	Road Tar
10.	IS 358:1964	Benzole Industrial revised
11.	IS 436 (Part 1/Sec 2):1976 Reviewed In : 2010	Methods for sampling of coal and coke Part I Sampling of Coal Section 2 Mechanical sampling
12.	IS 436 (Part 2):1965 Reviewed In : 2010	Methods of sampling of coal and coke Part 2 Sampling of coke
13.	IS 4836:1968	Foundary Coke
14.	IS 5018:1968	Classification of hard coals by type
15.	IS 535:1955	Benzene Pure Nitration Grade
16.	IS 5615:1970	Gas Coke
17.	IS 6372:1971	Coke For Ferro-alloys
18.	IS 6407:1971	Rubber Aprons For Hospital Use
19.	IS 7189:1974 Reviewed In : 2005	Blast Furnace Coke
20.	IS 7190:1974 Reviewed In : 2010	Methods of determination of bulk density of coke
21.	IS 7221:1974	Methods of determining the moisture holding capacity in hard coals

Annexure-II :List of Indian Product Standards

SI. No.	IS No. & Year	Title
1.	IS 12770:2025	Coal for Cement Manufacture - Specification First Revision
2.	IS 18724:2024	Solid biofuels - Fuel specifications and classes - Pellets from agro and herbaceous residues
3.	IS 18725:2024	Solid biofuels - Fuel specifications and classes - Briquettes from agro and herbaceous residues
4.	IS 212:2021	Crude coal tar for general use Third Revision
5.	IS 216:2006 Reviewed In : 2021	Coal tar pitch - Specification Second Revision
6.	IS 218:1983 Reviewed In : 2023	Specification for creosote oil for use as wood preservatives Second Revision
7.	IS 4286:2024	Domestic Coke - Specification Second Revision
8.	IS 439:2020	Industrial Coke - Specification Fourth Revision
9.	IS 9912:1981 Reviewed In : 2025 Decision taken to Reaffirm and Archive	Coal tar based coating material and primers for protecting iron or steel pipelines - Specification First Revision