API 510 pdf download.Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration 1.1.1 Coverage This inspection code covers the in-service inspection, repair, alteration, and rerating activities for pressure vessels and the pres- sure-relieving devices protecting these vessels. This inspection code applies to all refining and chemical process vessels that have been placed in service unless specifically excluded per 1.2.2....