IS 1571-Jet A-1 Specification - difference between current (2017) and previous version (2008)
IS 1571-Jet A-1 Specification - difference between current (2017) and previous version (2008)
AVIATION
TURBINE FUELS, KEROSENE TYPE, JET A-1 — SPECIFICATION IS 1571 Ninth Version has
been published recently by Bureau of Indian standards, New Delhi as IS 1571 :
2017 replacing earlier version of 1571:2008.
Chronologic
development of IS 1571 since 1960 can be read at https://rjpatelioc-petroleum.blogspot.com.au/2018/03/jet-1-aviation-fuel-specification-is.html
Major differences between these are tabulated below:
S.No
|
Characteristic
|
2017 Spec Ref
|
IS1571:2017
|
IS1571:2008
|
Remarks
|
1
|
UK DEF Stan Specification
ASTM D 1655
AFQRJOS (Aviation fuel quality requirements for jointly operated
system)
|
Foreword
Foreword
Foreword
|
Aligned with DEF Stan 91-91 /Issue 7
Assistance derived from ASTM D1655-15c
Assistance from AFQRJOS – Issue 28 March 2015
|
Aligned with DEF Stan 91-91 /Issue 5
Assistance derived from ASTM D1655-04a
Assistance from AFQRJOS – Issue 20 March 2005
|
Change in Def Stan Spec
--
--
|
2
|
Particulate at point of manufacture, Cumulative channel particle count
|
Table 1. i(d)
|
Introduced
|
--
|
--
|
3
|
Total Sulphur % m/m Max
|
Table 1. ii(c)
|
0.3
|
0.3
|
Clearly mentioned defence requirement to be met at 0.25% under note no
5
|
4
|
Refining components at the point of manufacture
|
Table 1. ii(f)
|
Report
|
Report
|
Non-hydro processed components and Synthetic components included
|
5
|
Silver strip corrosion classification, for 4h at 500C, Max
|
Table 1. vi(b)
|
“0” at Refinery
“1” at delivery point
|
--
|
Silver Strip corrosion reintroduced
|
6
|
Thermal stability, JFTOT at control temperature of 2600C
a) Filter pressure differential mm Hg, Max
b) Tube rating Visual
|
Table 1. vii(a)
Table 1. vii(b)
|
25
Less than 3, no peacock(P) or Abnormal
|
25
Less than 3, no peacock(P) or Abnormal
|
ISO 6294 test method removed and IP323,ASTM D3241 test methods
included, In case of dispute P-97 is referee method
|
7
|
Electrical Conductivity, pS/m
|
Table 1. x
|
50,Min
600,Max
|
50,Min
600,Max
|
Note 19 included
|
8
|
Test Methods References
|
Annex A
|
Introduced
|
Not mentioned
|
--
|
9
|
Information on sampling and particulate contamination
|
Annex D
|
Sampling procedure elaborated
|
Not mentioned
|
Newly introduced
|
10
|
Quality assurance
|
Annex E
|
Introduced
|
Not mentioned
|
--
|
11
|
Precision statement for test methods
|
Note 21
|
Shall be
ISO 4259 procedure - in case of dispute
|
Not mentioned
|
--
|
12
|
Test methods
|
Total Sulphur:
ISO 8754 besides P-34
Flash point;
P-20
Distillation:
P-18
KV at -200C
P-25
Smoke point;
ISO 3014/IP598
|
P-34 only
Same
Same
Same
ISO 3014
|
--
IP 170 alternate
D 86 alternate
clearly mentioned Jet A-1 as group-4 product
D 445 alternate
--
|
IS 1571 : 2017, Specifications can be
purchased from BIS offices. HQ address is MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR
MARG NEW DELHI 110002.
Compiled
by Mr VVS Trinath/ M.Kasiswara Reddy at
IOCL Visakha laboratory
Published
as blog by R J Patel
Ref :
IS1571:2017 IS1571:2008UK DEF Stan 91-91ASTM D 1655 AFQRJOS (Aviation fuel quality requirements for jointly operated system)BIS HQ - MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002.
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