| 摘要 |
1518586 Repairing tubular members ALLIED CHEMICAL CORP 21 July 1976 [22 July 1975] 30400/76 Heading F2P To prevent egress of process gas from a metal inlet core 11 for passing gas from the outlet side of a hydrocarbon cracking heater to the tube side of a heat exchanger, at least one aperture 27 is formed in the side wall, a pressure resistant metal wall 28 spaced from but connected to the cone is provided, and the space and aperture filled with a refractory material 29 east into said space. Preferably the core has four equally spaced apertures wihch may be formed in the region of cracks. |
