Conical Vessel Heads

Jiutian's company introduction names ellipsoidal heads as one of its vessel-head constructions.

Dished heads are listed separately from ellipsoidal, spherical and conical constructions in the Jiutian company introduction.

The published company range includes spherical heads; the broad product category does not establish a vessel-specific design or acceptance standard.

The company's introduction distinguishes segmented spherical heads from its other vessel-head constructions.

Metal-structure manufacture and sales appear in Jiutian's own company business scope, separately from its named vessel-head profiles.