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As one of the most pressing components of pressure vessel, the galvanized pipe cap has many forms and can be divided into spherical, elliptic, saucer-shaped, spherical crown, cone-shell, and soon, with the most application of oval tube caps. The oval tube cap is composed of two parts: a half ellipsoid and a straight edge (i.e. a short cylinder) with a height of H. The Straight Edge section is used to stagger the connecting edge of the ellipsoidal shell and the cylinder with the welded joint of the pipe cap and the cylinder, to prevent the superposition of the edge stress and the thermal stress, and to avoid the abrupt change of radial curvature radius at the joint weld of the galvanized pipe cap and cylinder to improve the stress condition of weld.
Although the elliptical cap is only a small part, it has important meaning and function for the development of industry. The tightness of spare parts, whether aging, life length and so on, all have the important influence to this equipment and equipment. Users, to regular inspection of spare parts, and maintenance, can be wiped with lubricating oil, prolong the life of parts. In addition, I would like to mention that the specification of parts is also very important, whether the standard directly affect the use of specifications. Therefore, consumers in the selection of spare parts, must choose to have a formal qualification of the manufacturers, the selection of products with standard specifications. Over the last few years, less than the size of the galvanized pipe cap, but the product quality is uneven. Customers in the selection of spare parts, it is best to ensure that the type of materials in order to prevent fraud!