Pressure Vessel Standard And Fabrication Process Introduction

Pressure vessel refers to contain gas or liquid, bearing a certain pressure of the closed equipment. In order to carry out scientific management and safety inspection more effectively, China's "Pressure Vessel Safety Supervision Regulations" classify pressure vessels into three categories based on work pressure, medium hazard and their role in production.

And for each category of pressure vessels in the design, manufacturing process, as well as test items, content and ways to make different provisions. Pressure vessels have been implemented import safety and quality licensing system, not to obtain import safety and quality license of the goods are not allowed to import.

Manufacturing process

1, the pressure vessel manufacturing processes can be divided into: raw materials acceptance process, marking process, cutting process, rust removal process, machining (including planing edge) process, the rolling process, the process group, the welding process Board), non-destructive testing process, marking the opening hole, the total inspection process, heat treatment process, pressure test process, anti-corrosion process.

2, different welding methods have different welding process. Welding process is mainly based on the welding workpiece material, grades, chemical composition, weldment structure type, welding performance requirements to determine. First of all, to determine the welding methods, such as hand arc welding, submerged arc welding, TIG welding, gas shielded welding and so on, the type of welding is very large, can only be selected according to the specific circumstances. Determine the welding method, and then develop the welding process parameters, welding process parameters of different types, such as hand arc welding mainly include: electrode type (or grade), diameter, current, voltage, welding power supply, polarity connection, welding Layers, number of channels, test methods and so on.