洁净管道酸洗、钝化规程

洁净管道酸洗钝化规程

Sanitary piping cleaning and passivation procedure

洁净管道酸洗、钝化规程

1.Purpose目的

This procedure is to define the chemical cleaning and passivation method and procedure of sanitary stainless steel (304/316L) equipment and piping system.

明确洁净不锈钢（304/316L材质）管道或设备系统的酸洗钝化方法和步骤。

2.Scope范围

The site 304/16L stainless steel equipment, pipeline pickling passivation and mobile or assembly equipment pickling passivation

现场304/316L不锈钢设备、管道酸洗钝化与移动或组装设备的酸洗钝化。

3.Responsibilities职责

3.1 The site operators should carry out the pickling and passivation of 304/316L

stainless steel piping or equipment per this procedure.

现场操作人员应按照本规程进行304/316L不锈钢管道或设备的酸洗、钝化。

3.2 The site project manger is responsible for submitting this procedure to the owner

for approval and putting it into effect.

现场施工经理负责将本规程提交业主审核批准后实施。

3.3 The site safety personnel should check if all the necessary safety and protection

measures are ready before pickling and passivation, and keep supervising during the process.

现场安全人员应在系统酸洗、钝化进行前，检查所有必要的防护和安全措施已具备，并在实施过

程中保持监督。

4.Materials and equipments使用的材料和设备

Stainless steel piping or equipment pickling, passivation need the following materials: 不锈钢管道或设备的酸洗、钝化需要用到以下材料：

4.1 Piping flushing liquid: 管道冲洗液：

4.2 Chemical reagent for passivation: 钝化用化学试剂：

5.Procedure操作步骤：

5.1 Isolation – Isolate the system to be passivated from the equipments and instruments that can’t be passivated（such as flow meter）. List these equipments and

instruments, and give it to the owner for signature and confirmation. All of the

water use points, outlet, drains, and dead leg should have hand valves in proper

positions. Remove any component from the system that is not compatible with

passivation solutions. Isolating valves should be installed at the ends of inlet and return water hoses, and at any other places anticipated to have breaking points in

the system.

隔离——将需要进行酸洗钝化的系统与不能进行酸洗钝化的设备、仪表等隔离开（如流量计

等），并列出明细，请业主签字确认。所有的用水点、出水点、排污点和单流管在适当的位置

要有手动阀。移除任何不适合酸洗钝化的部件。进水回水软管上以及系统中任何可能有断点处

需安装隔离阀。

5.2 Installation– Connect the entire system into a circulation loop by circulating pump,

water supply pump, and hoses.

安装——使用循环泵、供水泵、软管等连接件，将整个系统连接成一个循环回路。

5.3 Feed water–Start the water supply pump, and feed deionized water to the supply tank

until there is sufficient back flow in the system. Continue to fill the supply tank

with adequate deionized water after the entire system is full.

系统蓄水——供水罐内去离子水，开动供水泵。向供水罐内添加去离子水直到系统有充分的回

流。等整个系统都充满水以后继续向供水罐内添加足够的去离子水。

5.4 Leak test– Inspect visually if there is leakage at the connections of the system

and repair the leak point. DO NOT add any chemical to the system until all leak

points have been repaired. DO NOT passivate a new system without pressure test.

泄漏检查——目测系统的所有连接处是否有泄漏并修复泄漏点。在没有修复好所有泄漏点之前不

允许添加任何化学制剂。没有经过压力测试的系统不得进行酸洗钝化。

5.5 Alkali cleaning –At room temperature by adding 96% sodium hydroxide purity,volume

According to the proportion of 4% and purified water or.Circulation 75 minutes.

Check if there is any alkali solution leakage at the valves and pipes.

碱洗——在常温下按容积添加纯度为96%的氢氧化钠，按4%的比例与纯化水配制。循环冲洗75

分钟。检查所有的阀门与管道是否有碱液渗漏。

5.6 Drain – Drain the alkali solution into waste tank.

系统排空——将碱液排放到合适的废液罐内。

5.7 Flushing – Flush the pipe with Deionized water until the outlet water pH is equal

to the inlet pH. Open all valves and test the pH at each use point, valve, and dead

leg.

冲洗——使用去离子水冲洗管路直到出水pH值与进水值相等。打开所有的阀，检查所有用点、

阀门、单流管的pH值。

5.8 Feed water–Start the water supply pump, and feed deionized water to the supply

tank until there is sufficient back flow in the system. Continue to fill the supply tank with adequate deionized water after the entire system is full.

系统蓄水——供水罐内去离子水，开动供水泵。向供水罐内添加去离子水直到系统有充分的回

流。等整个系统都充满水以后继续向供水罐内添加足够的去离子水。

5.9 Pickling－ At room temperature by add the purity of 66% nitric acid volume,

according to the proportion of 25% and purified water or distilled water.

Circulation for 30 minutes. (For the sub-pipe that can’t be passivated, open the

valve to make the sub-pipe full of passivation solution when the main pipe is