Difference between head and cap
The pipe cap is a kind of pipe fitting installed on the external thread of the pipe end to block the pipe. The head is suitable for the upper and lower parts or left and right ends of the vessel equipment.
Generally, the pipe cap is of outer diameter, such as 73, 89, 114.3mm. If DN exceeds 300, the head shall be used instead. The pipe cap can be directly screwed on the end of the pipe, and no other pipe fittings are needed as auxiliary. It is generally applicable to screw on the pipe cap after sampling at the end of the pipe. The pipe cap is generally used in the case of low pressure to facilitate disassembly and maintenance, and it is generally not used in the case of high and medium pressure. The pipe cap includes convex pipe cap, conical shell, variable diameter section, flat cover and tight mouth.
Generally speaking, the head refers to the inner diameter, such as 1.2m head. There is no requirement for the transition part. Generally, only the diameter and length can be obtained, and the straight edge part is longer. The shape of head and pipe cap is similar, the material is stainless steel, and the size of pipe cap is small, which can be forged; the size of head is larger, which is generally pressed with steel plate, and the convex pipe cap includes oval pipe cap, hemispherical pipe cap, spherical pipe cap and dished pipe cap. From the stress point of view, the hemispherical cap of convex cap is gradually bad, but from the point of view of manufacturing difficulty, it is gradually good.
Head and cap are used in water, nuclear power, petrochemical, machinery, shipbuilding, medical equipment, waterproof treatment and other fields. Haihao Group produces pipe caps and heads of various materials and standards to meet the needs of customers. It has participated in the supply of pipe fittings for various large-scale projects abroad. It has been widely praised by customers for more than 30 years. It has been adhering to the concept of serving customers wholeheartedly and serving new and old customers wholeheartedly.Emai:sales@haihaogroup.com