Understanding of the phrase “rinsing with water” (in the context of equipment pressure testing)

Logically, this means that water with a chloride content of 50ppm to 250ppm can be used for testing only when the duration of the test does not exceed 72 hours; furthermore, it is necessary to rinse with water having a chloride content of less than 50ppm after the test. But the usage of “includes ....” seems inappropriate

Unreliable interpretation: After conducting the test with dirty water, rinse the product with relatively clean water.

Vessels shall be hydrostatically tested using only potable water; saltwater, brackish water, or raw river water shall not be used. Testing of vessels or components made of austenitic stainless steel or austenitic stainless steel clad materials shall be conducted with water containing no more than 50 ppm of chloride; water containing more than 50 ppm of chloride but no more than 250 ppm may be used only if the duration of the test procedure is 72 hours or less and includes rinsing with water containing less than 50 ppm of chloride. Containers must be subjected to hydrostatic testing using only tap water； Sea water, brackish water, or untreated river water must not be used. Containers and components made of austenitic stainless steel or coated with austenitic stainless steel should undergo hydrostatic testing using water with a chloride content of no more than 50 ppm ； Water with a chloride ion content of more than 50 ppm but equal to or less than 250 ppm can also be used, provided that the duration of the hydrostatic test procedure does not exceed 72 hours, the time spent immersed in water with a chloride ion content of less than 50 ppm.

This post was last edited by lincqh on 2011-6-30 at 16:28. There is disagreement regarding the meaning of the last sentence: “and includes rinsing with water containing less than 50 ppm chloride”; professional clarification is needed – specifically, whether this rinsing step is part of the 72-hour hydrostatic test or whether it takes place after the hydrostatic test using relatively clean water. (The guy who always says it’s not reliable – I think his understanding is quite reliable.) ) --The scores are no longer available; they will be provided tomorrow. Thank you everyone. :victory:

Includes rinsing with water containing less than 50 ppm chloride – After the test, rinsing is carried out using water with a chloride content of less than 50 ppm. “Includes” means that the experimental procedure also ‘includes’ rinsing with water; it does not mean that the time spent rinsing with water is included within the 72 hours.

I agree with thyclaire’s view. I don’t understand technology, but when looking at water from another perspective… the idea of rinsing with water containing less than 50 ppm of chloride doesn’t make sense, but the duration of the testing procedure… which includes rinsing… makes much more sense.

This post was last edited by bamboobamboo on 2011-7-2 22:39. Water containing more than 50 ppm of chloride but not more than 250 ppm may be used only if the duration of the testing procedure is 72 hours or less, and if the procedure includes rinsing with water containing less than 50 ppm of chloride. Water with a chloride content higher than 50 ppm but not exceeding 250 ppm can be used only under the conditions that the entire hydrostatic testing process takes no more than 72 hours, and that the containers and components are also rinsed with water containing less than 50 ppm of chloride. Note: Austenitic stainless steel or austenitic stainless steel cladding materials are prone to pitting corrosion in environments with high chloride content. Therefore, if a water test is conducted using water with a high chloride content, the duration of the test should be kept as short as possible, and the pressure should be reduced afterward by using cleaner water to remove any residual salt from the surface. The purpose of washing with cleaner water, including within the overall processing time, is also to minimize the amount of time that austenitic stainless steel or austenitic stainless steel-coated materials are exposed to high chloride concentrations.