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Top Curb Angle Size Selection : API 650

Top Curb Angle Size Selection : API 650

Top Curb Angle Size Selection : API 650

(OP)
Dear All,

Can we use top curb angle size as per table given in API 650 section 5.1.5.9 e) based on tank dia with column supported roof for the case where design pressure is relatively on higher side but with in range of API 650 18 Kpa & tank dia is also comparatively big, because of that compression / participating area calculated / required is very high (as per Section 5 & Annex.F).

Kindly suggest

RE: Top Curb Angle Size Selection : API 650

5.1.5.9.e represents the MINIMUM curb angle size for a given diameter tank.

Since your tank is designed for internal pressure (per your comments), the curb angle, top shell ring, and roof must meet the minimum area requirement of F.5.1.

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