Hydraulic test for modified pressure vessels
Thread Content
When modifying existing pressure vessels, such as by making holes in the cylinder body, is a hydrostatic test necessarily required after welding is completed? What is the basis for requiring a hydrostatic test? If the equipment pressure is high but only 40 connections are in use, is a hydrostatic test necessarily required? What if the pressure is lower? If the equipment is large and a large amount of water needs to be filled on site, should the bearing capacity of the site’s foundation be taken into consideration? How did everyone solve the problems encountered on site?
Acceptance shall be carried out in accordance with the standards at the time of equipment manufacturing
A voltage withstand test is required! Basis: 1. Article 135 of the Pressure Vessel Regulations: “Pressure vessels under any of the following circumstances shall undergo a pressure test after passing internal and external inspections: 1. Those that have been repaired or modified by welding, or whose main pressure-bearing components have been replaced.” 2. Change the usage conditions. . . . 3.。 . . 2. Article 7 of TSG R7001-2004 \"Rules for Periodic Inspection of Pressure Vessels\": Pressure vessels that fall under any of the following circumstances must undergo a pressure test after passing a comprehensive inspection: (1) Those in which the pressure-bearing components have been replaced by welding; (2) Those in which the depth of welding repairs to the pressure-bearing components is greater than 1/2 of the wall thickness ； (III). . . . . . . . Slightly”