Flat bottomed folded head

Product Name: Flat Bottom Head
Product Series: Flat Bottom Head Series
Product Introduction
Flat head is an indispensable and important component in pressure vessel equipment in various industries, from petrochemicals, atomic energy to food and pharmaceuticals The head is the end cap on a pressure vessel and is a major pressure bearing component of the vessel The quality of the head is directly related to the long-term safe and reliable operation of the pressure vessel Case Study of Head Design Calculation
The inner diameter of the container is Di=4000mm, the calculated pressure is Pc=0.4MPa, the design temperature is t=50 ℃, the head is a standard elliptical head, the material is 16MnR (the allowable stress of the material is 170MPa at the design temperature), the negative deviation of the steel is not more than 0.25mm and not more than 6% of the nominal thickness, the corrosion allowance is C2=1mm, and the welding joint coefficient of the sealing head welding is? =1. Calculate the thickness, design thickness, and nominal thickness of the elliptical head KpDi calculates the thickness δ=------------------=4.73mm2 [σ] t Φ -0.5pc calculates the thickness δ d=δ+C2=4.73+1=5.73mm. Considering the effective thickness δ e of the standard elliptical head, it should not be less than 0.15% of the head inner diameter Di. The effective thickness δ e=0.15% Di=6mm. δ e>δ d, C1=0, C2=1, nominal thickness δ n=δ e+C1+C2=6+0+1=7mm. Considering the standard thickness of the steel specification, the thickness was raised by 1mm for the first design roundness value △ 1=1. Therefore, δ n=8mm is taken. According to the technical data of the professional head manufacturer Di=4000, δ n=8, the head processing thinning amount C3=1.5mm is reduced by the second thickness. The rounding value △ 2 is 0.5 If it is required that the thickness of the formed head should not be less than the nominal thickness δ n minus the negative deviation C1 of the steel plate, then the feeding thickness is: δ s=δ n+C1+C3+△ 2=8+0+1.5+0.5=10mm, and the minimum thickness after forming is 8.5mm. If the thickness of the formed head is not less than the design thickness δ d (which should be taken as δ e value), then the feeding thickness is: δ s=δ d (δ e)+C3+△ 2=8mm, and the minimum thickness after forming is 6.5mm