Petroleum and natural gas industries. Pipeline transportation systems. Subsea pipeline valves1 Scope This International Standard specifies requirements and gives recommendations for the design, manufacturing, testing and documentation of ball, check, gate and plug valves for subsea application in offshore pipeline systems meeting the requirements of ISO 13623 for the petroleum and natural gas industries. This International Standard is not applicable to valves for pressure ratings exceeding PN 420 (Class 2500).

test and use standardized adjustable speed electrical power drive systems

and durability requirements of work tables and desks for office tasks

Requirements for the various elements and signs are laid down in the further Parts of this British Standard

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reference should be made to BS 6700

Elements of structure

This waiting period allows potential post-process oxidation of Cr(III) to Cr(VI) to occur prior to testing

either for their own operations or to customers

retention system effectiveness

Some of these measurements like common box optical measurement methods are meant to be used during the research and development and quality control period of products

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