Negative difference of minimum head thickness
Negative difference of minimum head thickness
The minimum molding thickness of the head is equal to the calculated thickness + corrosion allowance + negative deviation of the steel plate. When there are holes, the minimum thickness should also be used to check the hole reinforcement, which may be greater than the calculated thickness + corrosion allowance + negative deviation of the steel plate. No matter how thick the plate you use, the final test will satisfy my calculated thickness plus corrosion allowance. The minimum thickness shall not be less than the negative deviation of nominal thickness reduction plate.
The minimum head thickness can be calculated by pressing 150. However, the minimum thickness of many units of design drawings is not necessarily the minimum thickness calculated. It is to give a quantity, this thickness in addition to meet the minimum thickness requirements, the more important significance is to let the manufacturer according to the actual head blanking thinning rate to adjust the cutting thickness, meet the minimum thickness line.
= KPD1/(2 t nancial affairs -0.5p)
K: shape coefficient, generally 1.0, P: design pressure, D1: inside diameter of head, sigma t: allowable stress at material design temperature, nancial structure: weld coefficient. Take 0.85 or 1.0Prev News：>
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Discussion on whether t weld joint is allowed on seal head| Updated:2019.12.12 Source: Clicks:
