ISO 28781:2010 pdf download

ISO 28781:2010 pdf download

ISO 28781:2010 provides the requirements for subsurface barrier valves and related equipment as they are defined herein for use in the petroleum and natural gas industries. Included are the requirements for design, design validation, manufacturing, functional evaluation, repair, redress, handling and storage.Subsurface barrier valves provide a means of isolating the formation or creating a barrier

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