Abstract
The fire safe valves are designed for petroleum and petrochemical complexes and allied industries because working fluid characteristics result in a high fire risk, detonation and / or explosion. Fire Safe Certification is achieved through a standardized fire testing. This article aims to show how to optimize the shape and size of the main body of a ball valve in sequence CAD – FEM - testing and evaluation of the performance of valves when exposed to fire. This analysis is necessary because fire testing is expensive to verify and the validation of constructive solutions helps reduce production costs and achieve fire prevention through design.
Highlights
Fire-safe valves play an important role in reducing losses due to accidental fires
Establishing parts shape and predimensioning Determination of a valve body shape is generally subject to the conditions of flow of the fluid and the mounting of the closure element
finite element method (FEM) is an important part of the process of designing the equipment
Summary
Fire-safe valves play an important role in reducing losses due to accidental fires (financial, human and environmental). Their use can isolate fault portions of the equipment and process from the rest of the plant, power failure with flammable products in the exposed area of the fire [1], and errors in choosing valves or absence fire-safe feature can have catastrophic consequences [2]. This type of valve satisfies main trends manifested in the construction and use of such equipment: small dimensions, low-pressure losses, use self-sealing (adjustable as contact pressure and the relative position of the obturator against the sealing surface of the body). Add to this double sealing: nonmetal/metal to ensure closing in case of the existence of the gaseous component in working fluid and metal/metal for the situation of the first metallic sealing element destruction due to fire
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