Large Diameter Head

Large Diameter Head is a special large-size dished end closure widely used for large-scale pressure vessels,storage tanks,industrial boilers,water treatment tanks and chemical tower equipment.Different from standard small and medium-sized heads,large diameter heads feature super wide forming range,smooth overall curvature and uniform stress distribution,which ensure overall stability and sealing performance for large-volume industrial container systems.

We professionally manufacture custom large-diameter heads in various shapes,including ellipsoidal heads,torispherical heads,hemispherical heads and flat heads.Available materials cover carbon steel Q245R,Q355R,SA516 Gr70,stainless steel 304,316L,and 2205 duplex steel.All materials are strictly selected to adapt to large tank operation environments such as atmospheric pressure,medium pressure,corrosion resistance and high temperature working conditions.

Large diameter heads adopt advanced integral hot spinning and overall forming technology.Compared with segmented splicing heads,integral large heads have no welding seam,achieving higher structural strength,better air tightness and more beautiful surface finish.After professional heat treatment,the product eliminates internal stress,avoids deformation and cracking,and maintains stable mechanical performance in long-term service.

Our factory supports ultra-large size customized production according to customer drawings,including custom diameter,wall thickness,straight edge height and groove requirements.Each large diameter head undergoes strict dimensional inspection,thickness testing and flatness calibration.Surface treatments such as shot blasting,anti-rust painting,pickling passivation and polishing can be provided on request.Nondestructive testing(UT/MT)is available to ensure zero internal defects.

Large diameter heads are core components for large industrial equipment,commonly applied in petrochemical storage tanks,environmental protection water tanks,thermal power boilers,biogas tanks,pharmaceutical reaction tanks and large municipal pressure equipment.With seamless integral structure and reliable load-bearing capacity,they effectively improve the safety and service life of large container systems.

We have mature production experience in super-large head forming,solving the technical difficulties of large-size forming distortion and insufficient roundness.With stable quality,reasonable price and customized service,our large diameter dished heads are exported to global markets and widely recognized by engineering contractors and equipment manufacturers.