Regulations for Safety Inspection of Hazardous Machines and Equipment Article 156

If the internal inspection for the following vessels for high-pressure gases cannot be carried out, the Employer shall submit the documents ( including the safety and health management status, the self- inspection plans and their implementation records, detailed condtruction drawing, emergent reponse plans, safety protection devices and the proposal of alternative inspection methods ) to the inspecting organization three (3) months ahead of time before the expiration date of the qualification certificate of inspection for approval in forms of either by extending the time limit of the internal inspection, or by substituting with other means of inspection:1. Those are free of manholes or cannot be equipped with manholes, cleaning holes or inspection holes either according to related stipulations, or due to restriction from constructional reasons.2. Vessels used for low-temperature or ultra-low-temperature high-pressure gases.3. Vessels of Jacket type or others with no concern of corrosion.4. Other vessels that have difficulty in performing internal inspection.
中文原文 危險性機械及設備安全檢查規則第156條
雇主對於下列高壓氣體容器無法依規定期限實施內部檢查時,得於檢查合格證有效期限屆滿前三個月,檢附其安全衛生管理狀況、自動檢查計畫及執行紀錄、該容器之構造詳圖、緊急應變處置計畫、安全保護裝置及檢查替代方式建議等資料,報經檢查機構核定後,延長其內部檢查期限或以其他檢查方式替代:
一、依規定免設人孔或構造上無法設置人孔、掃除孔或檢查孔者。
二、低溫或超低溫之高壓氣體容器。
三、夾套式或無腐蝕之虞者。
四、其他實施內部檢查困難者。

English translation for reference only; the Chinese text prevails. Not legal advice.