API SPEC 6D:2009 pdf dwonload

API SPEC 6D:2009 pdf dwonload.Specification for Pipeline Valves.
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ShaM: As used in a standard. shall denotes a minimum requirement in order to conform to the specification.
Should: As used in a standard, should denotes a recommendation or that which is advised but riot required in order to conlorm to the specification.
this standard is under the junsdicteon of the API Standards Subcommittee on Valves and Wellhead Equipment (API SC6). This API standard is identical with the English version of ISO 14313:2007. ISO 14313 was prepared by Technical Committee ISOITC 67 Materials, equipment and offshore structures for petroleum and natural gas eridustnes, SC 2, Pipeline transportation systems.
For the purposes of this standard, the following editorial change has been made:
— A national informative annex (Annex F—API Monogram) has been included giving guidance to users.
This standard shaM become effective on the date prwited on the cover but may be used voluntarly from the dale of distribution.