Pressure Vessel Repairs and Alterations
There are special requirements needed to repair or alter pressure vessels fabricated of tempered (UHT) and quenched materials. The most frequent repairs and alterations are done on over-the-road LPG (Liquid Petroleum Gas) transport vessels. These are the areas of consideration when repairing or altering tempered and quenched materials. At Outweld Industries Inc., we guarantee our projects will meet all industry standards and exceed your expectations.
• Welding Procedure Qualification – We review the requirements and are familiar with the rules governing repairs and alterations.
Any surface cut by a metal melting method, that is not going to be re welded, has 1.5 mm removed by mechanical means such as grinding. It is inspected by magnetic powder (MT) or penetrant testing (PT) after being ground.Temporary welds are removed after serving their purpose. The maximum weld reinforcement will not be more than the lesser of 3.0 mm or ten percent of the thickness of the plate. The base metal is restored to a smooth contour.
• Other Procedures – There are also requirements for Nondestructive Examination, Post Weld Treatment, and Nameplates. For any repair or alteration of pressure vessels, we refer to the Code of specific requirements that pertain to any material we use.