What water is used for the hydrostatic test of oxygen pipelines? ? I would like some advice
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Dear sea friends, may I ask what kind of water is suitable for conducting hydraulic testing on oxygen pipelines (made of stainless steel)? According to the **specifications, pressure testing must be carried out using oil-free and clean water (with proper control of chloride ions), but what are the specific criteria for ensuring oil-free status? Our unit plans to use deionized water for testing; the oil content level detected in this water was 5.4 mg/L. I would like to ask experts whether this water can be used? ?
This post was last edited by niat8888 on 2016-11-11 at 16:25. You already said it’s the water pressure in the oxygen pipeline. . . Of course, it’s water. . Oil-free water, air, nitrogen, etc., should be used for pressure testing; the oil content in this water is acceptable. . . It is generally required that the oil content be less than 125 mg/square meter
“”The general requirement that the oil content should be less than 125 mg/L – where does this come from?
Deionized water – does it contain chloride ions?
Generally, clean water is used, with a chloride content of no more than 25 ppm. I haven’t come across the term ‘oil content’ before.
:Lol, refer to the requirements regarding air separation and oxygen pipelines
Regarding the issue you raised, since oxygen pipelines undergo degreasing treatment after pressure testing, the requirements for water used in the hydraulic testing of these pipelines are specified in clause 8.6.4.1 of the \"GB 50235-2010 Code for Construction of Industrial Metal Piping Projects\": clean water should be used for hydraulic testing. When testing stainless steel, nickel, and nickel alloy pipes, or pipes connected to such pipes or equipment, the chloride ion content in the water shall not exceed 25×10￣6 (25 ppm). The degreasing process is carried out in accordance with the provisions on degreasing in Section 9.5 of the \"GB 50235-2010 Code for Construction of Industrial Metal Piping Projects\". For reference
I know this; no specific standards regarding the oil content in the water are specified there – only clean water free of oil is required. I ensured that the inside of the pipes was clean and free of oil during the construction process (the oil level there was 49 ppm). After the hydrostatic test, I didn’t carry out any further degreasing procedures, only purging.
Of all these standards, only the requirement to use oil-free and clean water is mentioned, but such oil-free and clean water is practically unavailable. **The specifications state that the oil content in desalinated water should be below 2 mg/L. Therefore, for pressure testing of oxygen pipelines, clean and oil-free water should be used; what exactly are the standards regarding the oil content in this context?
According to the provisions of JBT6896-2007, the surface concentration of oxygen on the equipment should not exceed 125 mg/square meter, which meets the requirements