Modern Gasworks Practice

MODERN GASWORKS PRACTICE 652 ;M ‘AI Fig. 405.—Diagbam or Telescopic Holder and Guide-fbaming. fic. 406.—Housed Gasholder at Tegel (Bbblin) Wobks. above |-inch diameter must be driven hot. Forthe pur-pose of making the joints between the plates gas-tight, it is essential to in-sert at the lap strips of tape soaked in red lead. SUPPORT FOR THE CROWN The dome of a gasholder, owing to its frail construction, requires some form of support when. the holder is grounded and is receiving no support from the internal pressure of the gas. There are two com-mon methods of preventing the crown from buckling inwards, namely:—