Gross Heating Value (GCV) range

9,340 – 10,420 Kcal/SCM

(1,050 – 1,170 BTU/SCF)

Methane

not less than 85.0 Mol %

Ethane

not more than 9.2 Mol %

Propane

not more than 3.00 Mol %

Butanes and heavier

not more than 2.00 Mol %

Pentanes and heavier

not more than 0.25 Mol %

Nitrogen

1.0 molecular %

Total Sulphur

10.0 ppm (w)

Sulphur in form of Hydrogen Sulphide

10.0 ppm (w)

Maximum variation in Wobbe Index (WI)

[ WI = LHV (Volumetric Basis / (Specific Gravity w.r.t. Air)0.5 ]

+/- 5.0 %

Contaminants

(a)                                                                 Trace Metals

i.                                                                        Pb + Zn

0.50 ppm (w)

ii.                                                                        Na + K

0.30 ppm (w)

iii.                                                                    Vanadium

0.50 ppm (w)

iv.                                                                      Calcium

2.0 ppm (w)

v.                                                                    Magnesium

2.0 ppm (w)

vi.      Sum of heavy metals (Hg+V+Pb+Zn+Ni+Others)

1.0 ppm (w)

(b)                                                      Solids / Particulates

i.                           Total for particle size up to 10 micron

ii.                                         For 2 micron < d < 10 micron

20.0 ppm (w)

iii.                        For particle size grater than 10 micron

1.50 ppm (w)

0.30 ppm (w)

(c)                                                               Liquid contents

Nil

(d)                                                                    Moisture

112 kg/million SCM

Hydrogen content

1.00 %   (by volume)

Acetylene (C2H2)

0.10 %   (by volume)

Higher Hydrocarbons for n>=3

10.0 %   (by volume)