IS 201: Quality Tolerance for Water for Textile Industry--Specification (Second Revision)

7 Pages·1992·1 MB·English

by  Bureau of Indian Standards (BIS)

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IS 201 (1992, Reaffirmed 2008): Quality Tolerance for Water
for Textile Industry--Specification (Second Revision). UDC
543.3 : 677
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IS 201 : 1992
REAFFIRMED
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Indian Standard
QlTALITY TOLERANCE FOR WATER FOR
TEXTILE INDUSTRY - SPECIFICATION
( Second Revision)
UOC 543 '3 : 677
© BIS 1992
U EAU OF IN I N STAN A S
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
October 1992 Price Group 1
, WaterS.ectional Committee, CHD 013
FOREWORD
This Indian Standard ( Second Revision) was adopted by the Bureau of Indian Standards, after
the draft finalized by the Water Sectional Committee had been approved by the Chemical Division
Council.
This Indian Standard was first published in 1950. Subsequently it was revised in 1964 incorporating
requirements for corrosivity, colour, turbidity, manganese, and mould spores and odour.
Objection to colour and turbidity in water used in textile industry is because of the fact that they
cause streaking and straining. Iron and manganese strains cause other difficulties in processing.
even at low concentrations. The objection to hardness is in many operations, especially, in
scouring where soap curds may be produced, and in process where deposits of precipitated calcium
and magnesium may stick to the material.
Based on the experience gained over the years, the technical committee responsible for the
formulation of this standard decided to revise it. In this revision requirements for sulphates,
chlorides, aluminium and bicarbonates have been incorporated while the tolerance limits for total
hardness and iron have been suitably modified.
In the preparation of this standard, considerable assistance has been obtained from Special
Technical Publication No. 148-D Manual on Industrial Water and Industrial Waste Water, Second
Edition 1959, published by the American Society for Testing and Materials, USA.
This standard is intended chiefly to cover the technical provisions relating to water for textile
industry, and it does not include all the necessary provisions of a contract.
For the purpose of deciding whether a particular requirement of this standard is complied with,
the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded
off in accordance with IS 2: 1960 'Rules for rounding off numerical values (revised)'. The'
number of significant places retained in the rounded off value should be the same as that of the
specified value in this standard.
AMENDMENT NO.1 SEPTEMBER·1994
IS 201: 1992 QUALITY TOLERANCE FOR WATER
FOR INDUSTRY - SPECIFICATION
(Second Revision)
(Page 2, Table 1, Note 2) - Substitute '200' for '2' in Hne 2.
(CHD 013)
Reprography Unit, 81S, New Delhi, India
IS 201 : 1991
Indian Standard
QUALITY TOLERANCE FO WATER FOR
TEXTILE INDUSTRY - SPECIFICATION
( Second Revision )
1 SCOPE IS No. Title
3025 Methods of sampJing and
1.1 This standard prescribes the quality tole
( Part 24 ) : 1986 test ( physical and chemical)
rances for water for textile industry.
for water and waste water:
2 REFERENCES Part 24 Sulphates (first
revision)
2.1 The following Indian Standards are the 3025
Methods of sampling and
necessary adjuncts to this standard: ( Part 32 ) : 1988
test ( physical and chemical)
IS No. Title for water and waste water:
Part 32 Chlorides (first
1622 : 1981 Methods of sampling and revision)
microbiological examination
8914 : 1988 Quality tolerance for water
of water ( first revision)
for vitreous enamel industry
3025 : 1964 Methods of sampling and ( first revision)
test ( physical and chemical)
for water used in ind ustry 3 TOLERANCES
3025 Methods of sampling and
3.1 Corroshity
( Part 1 ) : 1986 test ( physical and cheJ,11ical )
for water and waste water:
The water shall be non-corrosive when tested
Part 1 Sampling (first
as per the method prescribed in Annex A.
revision)
3025 Methods of sampling and 3.2 Algae and Mould Spores
( Part 4 ) : 1984 test ( physical and chemical)
The water shall be free from algae and mould
for water and waste water:
spores when tested according to the method
Part 4 Colour (first revision)
prescribed in IS 1622 ; 1981.
3025 1\1ethods of sampling and
( Part 10 ) : 1984 test ( physical and chemical) 3.3 Odour
for water and waste water:
Part 10 Turbidity (first The water shall be free from objectionable
revision) odour.
.3025 Methods of sampling and 3.4 The water shall also comply with the
( Part 11 ) : 1983 test ( physical and chemical) tolerances given in Table 1, when tested accord
for water and waste water: ing to methods prescribed in col 6 of Table 1.
Part 11 pH value (first
revision) 4 SAMPLING
3025 Methods of sampling and
4.1 Representative test samples of water shall
( Part 21 ) : 1983 test ( physical and chemical)
for water and waste water: be dra Wll as prescribed in IS 3025 ( Part 1 ) :
1986 and IS 1622 : 1981.
Part 21 Total hardness ( first
revision)
5 TEST METHODS
3025 Methods of sampling and
( Part 23 ) : 1986 test ( physical and chemical) 5.1 Tests shall be carried out as prescribed in
for water and waste water: Annex A and parts of IS 3025. References to
Part 23 Alkalinity ( first the relevant clauses and parts of IS 3025 is given
revision) in col 6 of Table 1.
IS 201: 1992
Table 1 Tolerances for Water for Textile Industry
( Clauses 3.4 and 5.1 )
81 Characteristic Tolerances for Methed of Test, Ref to
No.
Bleaching, Dyeing Wool
Purposes and Subsequent Scouring
Processing
(1) (2) (3) (4) (5) (6)
i) Colour ( Hazen units), Max 20 5 70 IS 3025 ( Part 4 ) : 1983
( see Note 1 )
ii) TlHbidity, NTU, Max 2 2 2 IS 3025 ( Part 10 ) : 1984
iii) pH -----6-0 to 8·5------ IS 3025 ( Part 11 ) : 1983,
iv) Total hardness ( as CaC03 ), 50 2 2 IS 3025 ( Part 21 ) : 1983-
mg/I, lYfax (see Note 2)
v) Jron ( as Fe ). mg/I, Max 0-25 0'1 0-1 32 of IS 3025 : 1964
vi) Manganese ( as Mn ), mgjl. Max 0'10 0-10 0-10 35 of IS 3025 : 1964
vii) Iron ( as Fe ) and Manganese ( as Mn ) 0-25 0-1 0-1 32 and 35 of IS 3025 :
added together, mgll, Max 1964
viii) Aluminium (as Al ), mg/I, Max 0'1 0'1 0'1 31 of IS 3025 : 1964
ix) Sulphate ( as SO, ), mg/I. lYfax 100 IS 3025 (Part 24 ) : 1986,
x) Chloride ( as Cl ), mg/I, Max 100 IS 3025 ( Part 32 ) : 1988
xi) Total alkalinity ( as CaC03 ), 150 150 150 IS 3025 (Part 23) ; 1986-
mg/I. Max
NOTES
1 When dark or medium dark dyeing is done, a relaxed maximum limit 20 may be permissible, but for whites
and delicate shades, the limit shall not be relaxed.
2 For processes which are not sensitive to hardness salts or internal sequestering agents are used, a maximum
limit of 2 permissible.
ANNEX
(Clauses 3.1 and 5.1 )
TEST FOR CORROSIVITY
A-O· PRINCIFLE OF 1 HE lVIEIHOD A-2PROCEDURE
A·f).l lhis qualitative test determines the
A-2.I Determine the pH (see A-O.1.1) of the
stabjlity of a water with respect to calcium
sample as prescribed in IS 3025 (Part 11 ) : 198J
carbonate. The pH of the water is determined
or total alkalinity as prescribed in IS 3025-
before and after treatment with calcium carbo
( Part 23 ) : 1986.
nate. Any increase in pH as a result of this test
irdicates corrosivity.
A-2.2 Take the glass-stoppered bottle containing
A-O.l.I If, due to non-availability of a pH washed calcium carbonate (see A-I.I), fill it
meter, it is inconvenient to determine pH, the up with the sample and insert the stopper with
test is carried out by determining alkalinity of out allowing any air bubble to remain. Shake
the water. well to bring the powder in suspension through
out the bottle and set aside. Repeat shaking at
A-I REAGENT frequent intervals for about 4 hours. Finally,
allow to stand overnight and then filter rapidly
A .. 1.1 Predpitated Calcium Carbonate - pure.
by decanting through a fiiter paper. Determine:
Place about 10 g of the powdered material in the pH or total alkalinjty of the filtrate.
a 2S0-ml glass-stoppered bottle. Wash thrice
with portions of the sample to be tested, by A-2.3 The water shall be considered non·
stirring, allowing to settle for several minutes corrosive if the pH or total alkalinity determined
and then pouring off the supernatant liquid while in A-2.2 is not greater than that determined,
still turbid. in A. .. 2.1.
2