National standard sealing head or end cover is divided into convex sealing head, conical sealing head (only used for certain special purposes containers) and flat sealing head (except used as a cover for human holes and hands holes in pressure containers). National standard sealing head or end cover is divided into convex sealing head, conical sealing head (only used for certain special purposes containers) and flat sealing head (except used as a cover for human holes and hands
National standard sealing head is a part of the container (as in the above image) according to the different geometry, can be divided into spherical, oval, dish, ball crown, cone shell and cover and other kinds, in which spherical, oval, dish, ball crown type sealing is also collectively called convex sealing head. A yeke welding ye welding heads ye welding heads ye welding heads ye welding heads ye welding heads ye welding heads ye welding heads ye welding heads ye welding heads ye welding heads ye welding heads ye welding heads ye welding heads A tũnugda ne karen juëc ye kɔnɔ, i.e. tank, heat exchanger, tower, reactor, boiler, and separation equipment. Kä ye looi aye carbon steel (A3, 20#, Q235), stainless steel, alloy steel, aluminium, titanium, copper, nickel and nickel alloys etc.