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Risk-Based Inspection

API ICP Self Study Notes

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15.2.3 Process and Hardware Changes 过 程 和 硬 件 的 变 化<br />

Changes in process conditions and hardware, such as equipment<br />

modifications or replacement, frequently can significantly alter the risks, and<br />

dictate the need for a reassessment.<br />

Process changes, in particular, have been linked to equipment failure from<br />

rapid or unexpected corrosion or cracking. This is particularly important for<br />

damage mechanisms that depend heavily on process conditions. Typical<br />

examples include (1) chloride stress corrosion cracking of stainless steel, (2)<br />

wet H 2 S cracking of carbon steel, and (3) accelerated corrosion at points of salt<br />

deposition or at dew points and sour water corrosion. In each case, a change<br />

in process conditions can dramatically affect the corrosion rate or cracking<br />

tendencies.<br />

工 艺 条 件 的 变 化 可 以 显 着 影 响 腐 蚀 速 率 或 开 裂 倾 向 . 这 导 致 重 估 的 必 要 .<br />

API 580<br />

Charlie Chong/ Fion Zhang

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