作业许可证
一、PTW体系基础 | PTW System Fundamentals
二、许可证类型 | Permit Types
三、PTW流程 | PTW Process
四、PTW角色与职责 | PTW Roles & Responsibilities
五、隔离管理 | Isolation Management
六、气体检测 | Gas Testing
七、PTW审计与违规 | PTW Audit & Violations
场景一：热工+受限空间双许可签发 Hot Work + Confined Space Dual Permit Issuance I'm submitting a dual permit application for the transformer oil coolant pipe welding inside the cable trench in Substation B. This is Category A — we need both a Hot Work Permit for welding and a Confined Space Entry Permit because the trench is 1.6m deep × 0.9m wide, classified as confined space under Decreto 911/96. Here's the JSA, the isolation certificate for the oil system, and the gas test request.
递交B升压站电缆沟内变压器油冷管焊接的双许可申请。这是A类—— 焊接需热工许可、同时需受限空间进入许可、因沟深1.6m×宽0.9m、 按Decreto 911/96分类为受限空间。这是JSA、油系统隔离证书和气体 检测申请。
Let me review. JSA identifies three hazards: fire from welding sparks near residual oil residue (Probability Medium, Severity High — Risk Rating 15, unacceptable without controls), oxygen deficiency in the trench (Prob Low, Sev Critical — Risk Rating 12), and manual handling in a constricted space. Controls listed: fire blanket covering all openings within 10m, 2 × 9kg dry powder extinguishers positioned at the trench entrance, fire watch posted throughout welding plus 30 minutes after, continuous forced ventilation at 2,000 m³/h with ducting to trench floor, gas monitoring every 30 minutes with a calibrated 4-gas detector, and a tripod with winch and full-body harness for emergency retrieval. I need to verify each control on site before I sign. Walk with me.
审一下。JSA识别三个危害:焊接火花近残余油迹(概率中、严重性高—— 风险评分15、无控制不可接受)、沟内氧气不足(概率低、严重性危——风险 评分12)、狭窄空间人工搬运。列出控制:防火毯覆盖10m内全部开口、2具 9kg干粉灭火器放沟口、焊接全程加焊后30分钟设监火人、2000m³/h连续强 制通风管线到沟底、每30分钟用校准四合一检测仪测气、配三脚架绞盘全身 安全带应急救援。签发前须现场验证每个控制措施。跟我走。
(at the trench)
Gas tester, readings please.
气体检测人、读数。
Continuous ventilation running for 20 minutes. O₂: 20.8% — normal. LEL: 0% — no flammable gas detected. H₂S: 0 ppm. CO: 2 ppm — well below the 25 ppm PEL. Trench is gas-safe. I'll re-test every 30 minutes and log it on the permit. The detector was bump-tested this morning at 07:00 — calibration valid until tomorrow 07:00.
强制通风运行20分钟。O₂:20.8%——正常。LEL:0%——无可燃气体检 出。H₂S:0ppm。CO:2ppm——远低于25ppm PEL。沟内气体安全。每30分钟 复测并记录在许可证上。检测仪今早07:00做了碰触测试——校准有效期至 明早07:00。
Ventilation ducting reaches the floor — check. Fire blanket in place — check. Two extinguishers at entrance — check, seals intact, pressure in green. Tripod and winch rigged — check. Fire watch — you're the fire watch for this permit. You understand no other duties for the duration? Good. The Hot Work Permit HW-087 and Confined Space Entry Permit CS-042 are both approved. Valid for 8 hours — expires 17:00 today. If work is not complete by 16:30, apply for an extension — do not work past expiry. Supervisor, you are the permit holder. You are responsible for maintaining all control measures for the duration. Any change in conditions — any gas alarm, any ventilation failure, any change in scope — you suspend the permit and call me immediately.
通风管到沟底——检查。防火毯就位——检查。两具灭火器在入口—— 检查、铅封完好、压力绿区。三脚架绞盘就位——检查。监火人——你是 此许可监火人。清楚期间没有其他任务？好。热工许可HW-087和受限空间 进入许可CS-042双双批准。有效期8小时——今天17:00到期。如果16:30 没完成、申请延期——不要在到期后作业。主管、你是持证人。负责全时段 保持所有控制措施。任何条件变化——任何气体报警、任何通风故障、任何 范围变更——你暂停许可立即打给我。
场景二：PTW违规现场停工 PTW Violation — Site Stop Work
(arriving at Zone D cable trench) Stop work! Everyone out of the trench immediately. Supervisor, where is your confined space entry permit?
(到D区电缆沟)停工！所有人立刻出沟。主管、受限空间进入许可证 在哪？
It's... I submitted the application this morning. The issuing authority was in a meeting. The cable pulling crew is here today only — if we don't pull these cables now, they won't be back for two weeks. We couldn't wait. I did a quick gas test myself — it was fine.
这……今早交了申请。签发人在开会。放电缆班组只今天在——如果现 在不放这些电缆、他们要两周后才来。我们等不了。我自己快速做了气检—— 合格的。
There is no permit. There is no gas test record. There is no ventilation. There is no rescue plan. There is no fire watch for the cable heating torch I can see running inside the trench. You have committed five separate PTW violations. This is a Level 1 non-compliance — the most serious. The work is stopped. The crew is stood down for the rest of the day with pay — this is not their fault, it's a supervision failure. I'm issuing a Stop Work Order SWO-019. You, your subcontractor project manager, and I will meet in the site office in 30 minutes for a formal investigation. No work resumes in this trench until a proper permit is issued with all controls verified. Is that clear?
没有许可证。没有气检记录。没有通风。没有救援方案。没有监火人—— 而我能看到沟里电缆加热喷灯在运行。犯了五项独立PTW违规。这是一级 不合规——最严重。工作停止。班组今天剩余时间停工带薪——这不是他们 的错、是监管失职。签发停工令SWO-019。你、你们分包项目经理、我、 30分钟后在现场办公室开正式调查会。在正式许可签发且全部控制措施验 证之前、此沟不得恢复作业。清楚了吗？
Understood. I made a bad call — production pressure over safety. It won't happen again. But to be honest, the PTW issuance bottleneck is a real problem. Three issuing authorities for 1,200 workers — sometimes permits sit in the queue for four hours.
明白。我做了错误决定——产量压力压过安全。不会再犯。但说实话、 PTW签发瓶颈真实存在。三个签发人对1,200工人——有时许可证排队四 小时。
That's a valid operational concern and I'll escalate it to management. But the answer to a slow PTW system is to fix the system — not to bypass it. We'll add a fourth issuing authority for the peak construction phase. But that change happens through proper channels, not by ignoring the rules. See you in 30 minutes.
这是合理的运营关切、我会呈报管理层。但PTW体系慢的答案应是修 体系——不是绕过去。施工高峰期我们加第四个签发人。但这个改变通过 正规渠道、不是无视规则。30分钟后见。