PCT No. PCT/DE83/00004 Sec. 371 Date Sep. 15, 1983 Sec. 102(e) Date Sep. 15, 1983 PCT Filed Jan. 15, 1983 PCT Pub. No. WO83/02454 PCT Pub. Date Jul. 21, 1983.Coke oven chamber doors form heat-resistant plugs having a construction to prevent damage when the plugs are removed and replaced. Each plug consists of an external door-body plate and internal steel plates. The ends of the internal plates overlap each other for relative movement. The lowermost plate is secured at its lower end and the uppermost plate is secured at its upper end. This provides a specific longitudinal dimension of the overlapping plates.
