Valve degreasing treatment method
Release time:
2019-04-20
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Cleaning steps: The parts of the valve must go through the following process before assembly
1. Cleaning steps: The parts of the valve must be processed by the following processes before assembly
1. According to the processing requirements, some parts need to be polished, and there can be no processing burrs on the surface
2. All parts are degreased;
3. After the degreasing is completed, the pickling passivation is carried out, and the cleaning agent does not contain phosphorus
4. After pickling and passivation, rinse with pure water, there can be no residue of chemicals, and carbon steel parts are omitted from this step
5. Wipe and dry each part with non-woven fabric, and do not retain the surface of the parts such as wire wool, or blow dry with clean nitrogen
6. Wipe each part with non-woven fabric or precision filter paper dipped in pure alcohol until there is no dirty color.
2. Assembly requirements:
Cleaned parts must be sealed and stored for installation. The requirements for the installation process are as follows:
1. The installation workshop must be clean, or a temporary clean area must be built, such as using newly purchased color striped cloth or plastic film, etc., to prevent dust from entering during the installation process.
2. Assembly workers must wear clean cotton overalls, cotton hats, hair can not leak, feet wear clean shoes, hands wear plastic gloves, skimming.
3. The assembly tools must be degreased and cleaned before assembly to ensure cleanliness.
3. Other requirements:
1. The assembled valve should be purged with nitrogen for at least 1 minute.
2. The air tightness test must be pure nitrogen.
3. After passing the air tightness test, it should be encapsulated and sealed with a clean polyethylene cap, and the polyethylene cap should be soaked in organic solvent and wiped clean before use.
4. Then seal it with a vacuum bag.
5. Final packing.
6. During transportation, measures should be taken to ensure that the package is not damaged.
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