WHAT TYPE OF WATER USED IN HYDROTEST?? WATER ANALYSIS

HYDROTEST WATER QUALITY REQUIREMENTS:
The introduction of hydrostatic test water should be scheduled as close as possible to the equipment and/or system start-up date. Partial or complete refilling of the system shall count as continuous, cumulative time.
When the equipment contact time with hydrostatic test water could exceed 14 days for carbon steel and low alloys or 4 days for austenitic stainless steel systems, dissolved oxygen concentration shall be maintained at 20 parts per billion (ppb) or less by maintaining residual oxygen scavenger concentration at 20 parts per million (ppm) or greater.
Approved oxygen scavenger shall only be used.
For Dry Gas and Refined Hydrocarbon Product Pipelines, an oxygen scavenger shall always be added to the hydrostatic test water, even when the hydrostatic test water contact time is less than 14 days.
For testing austenitic stainless steels, chloride concentration shall be maintained at ≤ 50 ppm.
Seawater and high TDS aquifer water shall not be used for testing austenitic stainless steel systems.
Water containing hydrogen sulfide (H2S) shall not be used for hydrostatic testing or subsequent wet lay-up without prior approval.
The use of seawater/high salt hydrostatic test water in facilities under the responsibility of Pipelines Department shall be pre-approved in writing.
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Description: This Video is the second step to get familiar with a Welding Procedure Specification. How It looks, What are the basic components of WPS? Essential Non Essential variables, From where to pick the data? Comparison of the International Qualifying Standards in relation with the WPS Variables. ASME B 31.3, ASME B31.4, ASME B31.8, API 1104 Comparison of the WPS requirements. Discussion of all modules of a WPS taking a sample example.
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