Emitting Pipe Class as per (IS : 12786)
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Nominal Dia
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Inside Dia
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Wall Thickness mm
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CL – I
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CL – II
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CL – III
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12 mm
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10.5 mm
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0.4 – 0.5
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0.6 – 0.7
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0.8 – 1.0
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16 mm
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14.2 mm
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0.5 – 0.6
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0.7 – 0.9
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0.9 – 1.2
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20 mm
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18.0 mm
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0.7 – 0.8
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0.9 – 1.1
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1.2 – 1.4
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