ISO 10433:1994

Petroleum and natural gas industries — Drilling and production equipment — Specification for wellhead surface safety valves and underwater safety valves for offshore service

Requirements are specified in API Specification 14D (API Spec 14D), ninth edition, June 1 1994, which is adopted as ISO 10433. For the purposes of international standardization, however, modifications shall apply to specific clauses and paragraphs of publication API Spec 14D. These modifications are outlined.