hdian Standard SPECIFICATION FOR COAL TAR PITCH

(Revised) Fourth Reprint OCTOBER 1005

uM= 668-738 : 69.P16

Bitumen and Tar Products Sectional Committee, BCDC 2

SHIV D. C. SRARYA

Members DR. JOOINDER SINGH AHLVWALIA DR.-S. L. BANERISE

SRRI R. K. RAYCHANDRAN (Akn~k) MR. H. Y. CAMPBELL

SHRI ZAIN SHAH (Altcmde) %Rl G. DE DEPUTY DIRECTOR, RSSBARCX (M it C), CHITTARANJAN

DR. A. S. BHAINJRI (Akwnalc) SXRI B. S. DVEGAN

MR. C. J. FIELDER DR. A. LAHIRI SXRI S. R. MEHRA DR. G. V. L. N. MVRTY

SHRI C. N. N~IR SHRI P. RAJKHOWA (Alternate)

SHRI NARAIN SINGH SHRI G. H. SANI (Alternate)

SHRI D. P. NAYAR SHRI RABINDBR SINGH

DR. R. S. RATRA (AIlemale) SHRI P. D. SHIVDA~ANI DR. S. K. SIRCAR SHRI J. M. TREHAN

SHRI S. K. RAJAGOPALAN (AlteWaate) DR. H. C. VISVESVARAYA,

Deputy Director (Bldg)

Represenfing Public Works Department, Punjab

Ministry of Steel, Mines & Fuel Covemment Test House, Calcutta

Burmah-Shell Oil Storage C Distributing Co. of India Ltd., Bombay

Engineer-in-Chiefs Branch, Army Headquarters Railway Board (Ministry of Railways)

Directorate of Technical Development (Ministry of Defence)

Shalimar Tar Products (1935) Ltd., Calcutta Fuel Research Institute (CSIR). Jealgora Central Road Research Institute (CSIR), New Delhi The Tata Iron % Steel Co. Ltd., Jamshedpur Assam Oil Co. Ltd., Digboi

Caltex (India) Ltd., Bombay

Indian Roads Congress, New Delhi National Buildings ,Organization (Ministry of Works, Housing & Supply)

Standard-Vacuum Oil Co., Bombay Bararee Coke Co. Ltd., Manbhum Roads Wing, Ministry of Transport % Communications

Director, ISI (Ex-ojicio Member)

Secretary

SHRI D. AJITHA SIMHA Assistant Director (Bldg). ZSI

Tar and Tar Products Subcommittee, BCDC 2 : 4 Convener

MR. C. J. FIELDER Shalimar Tar Products (1935) Ltd., Calcutta

Members ASSISTANT DIRECTOR (BITUMEN DIVISICN) DR. S. L. BANERJEE SHRI B. S. DUEGAN

SHRI S. L. GANDHI (Altemc~e) SHRI S. N. GUPTA SHRI JoGINDEn SINGH G;~UEE;IN-CHARGE, WOOD P~llsERvAT1ox

Central Road Research Institute (CSIR), New Delhi Government Test House, Calcutta Directorate of Technical Development (Ministry of Defcnce)

Indian Roads Gmgres, New Delhi Development Wing, Ministry of Commerce & Industry Forest Research Institute C Colleges, Dehra Dun

SHRI J. C. SOOD The Tar Producers Association, Calcutta

Gr 2

@ CopVright 1961

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARC3

NEW DELHI 110002

October 1961

Indian Standmd SPECIFICATION FOR COAL TAR PITCH

(Revised) 0. FOREWORD

0.1 This revised Itidian Standard was adbpted by the Indian. Standards Institution on 30 June 1961, after the draft finalized by the Bitumen and Tar Products Sectional Committee had been approved bv the Building Division Council and the Chemical Division Council.

0.2 The Indian Standard Specification for Coal Tar Pitch was first published in 1951. With the publication of IS : 1201 to 1220-1958 Methods for Testing Tar and Bitumen, it became necessary to revise this standard by deleting the methods of test given and make a reference to the published compilation.

0.3 Coal tar pitch serves as a valuable ingredient irk the production of a number of waterproofing, protective and binding compounds employed in masonry, steel and timber structures. It is also used for waterproofing concrete. structures, caulking of decks, as a saturant for roofing felts, as a binder for carbon electrodes and coal briquettes, for damn-proof courses, flooring mastics and as a base for coal tar paints. Coal tar pitch to ?his specification is not suitable for formulation of quick dying black enamels nor for road construction, for which purposes Indian Standard Specification fol. Road Tar (Revised) (IS : 215-1961) should be referred to.

0.4 Since the issue of original specification there 1~:~s been a fundamental change in the nature of coal tar produced in the latest design of coke ovens, which makes it impossible to comply with the volatile matter content based on the limits specified in the original standard. Hence the provisions regarding volatile matter content have been deleted and instead a new provision on maximum permissible distillate percentage below 270C and 300C has bee11 included.

0.5 The Sectional Committee responsible for the preparation of this standard has taken into

consideration the views of producers, consumers and techriologists arid has related the standard to the manufacturing and trade practices followed in the country in this field. Due weightage has also been given to the need for international co-ordination among standards ~ prevailing in different countries of &he world. These considera- tions led the Sectional Committee to derive assistance from the following standards :

B.S. 1310 :I950 COAL TAR PITCHESFOR BUILD- ING PURPOSES. British Standards Institution.

ASTM DESIGNATION : D 450-41 COAL TAR PITCH FOR ROOFING. Materials.

American Society for Testing

0.6 This standard is one of a series of Indian Staridards on tar. Other standards in the series cover crude coal tar fog general use and road tar.

0.7 Wherever a reference to any Indian Standard appears in this specification, it shall be taken as a reference to the latest version of the standard.

0.8 Metric system has been adopted in India and all quantities and dimensions appearing in this standard have betn given in this system

0.9 I;or :he purpose of deciding whether a pa&- cula; requirement of this standard is complied with, the tinal value, observed or calcfilatetl, expressing the result of a test or analysis, shall be rounded off in accordance with IS : 2-196(! Rules for Rounding Off Numerical Values (Revised). The number of significant places retained in the rounded off value should be the same ai that of the specified value in this standard.

0.10 This standard is intended chiefly to cover the technical provisions relating to coal tar pitch, and it does not include all the necessary provi- sions of a contract.

1. SCOPE 3. GRADES

1.1 This standard covers the range of icur grades 3.1 Coal tar pitch shall be classified into. the of coal tar pitch from soft to hard consistencies followitig four grades : with softening points varying from 45 to 92C intended for the production of waterproofing

a) Soft Pitch,

protective and binding compounds employed in b) Soft Medium Pitch,

masonry, steel, timber and concrete structures c) Hard Medium Pitch, and and also for the preparation of roofing felts. d) Hard Pitch.

2. TERMINOLOGY 4. REQUIREMENTS

2.1 For the purpose of this standard the defini- 4.1 Composition - .The material shall be :

tions given in IS : 334 - 1953 Glossary of Terms .a) either the residue of the direct distillation of Relating to Bitumen and Tar shall apply. crude tar produced by the high temperature

2

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and operated by ihe producer. Standard marked pro- ducts are also continuously checked by BE3 for

of the Standard Mark may be granted to manufacturers

i conformity to that standard as a further safeguard. or producers, ma* be obtained, from the Bureau of

Details of conditions under which a licence for the use Indian Standards.

Printed at Printograph, New Delhi-5 (INDIA) 4

Title Page0. Foreword1. Scope2. Terminology3. Grades4. Requirements5. TestsTable I

6. Sampling and Criteria for ConformityTable II

7. Marking

s: ( Reaffirmed 1998 )