tender for bp hard coke to is:439/1989, gr-i. size: 175 mm to 200 mm, ash content: 25 max., moisture:4, max., volatile matter: 2 max., sulphur percentage: 0.7 (max.), phosphorus percentage: 0.3 (max.),shatter index (min.): 85, porosity percent: 35 to 45.
