Petroleum and natural gas industries. Drilling and production equipment. Subsurface barrier valves and related equipment1 Scope This International Standard 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 in the tubular to facilitate the

Dimensional information

Designation of the heat exchangers

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Who is BS 4993-9- Sulphur content in aluminum fluoride for

coaches and trailers

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subcritical crack growth

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notes to entry and examples corresponding to the basic concepts of nuclear energy

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and the compliance requirements listed below