Non-destructive testing of the jacket and shell welds
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I have previously worked on some equipment with jackets; the cylinder body is made of 304 steel, while the jacket is made of carbon steel. In the design drawings, non-destructive testing is specified only for welds of type AB. According to the standards, the jacket and the cylinder are welded from different types of steel, requiring 100% surface flaw detection; so if they are made of the same material, is flaw detection still necessary? Also. The head is generally a purchased product; regarding the welds at the joints of the head, who specifies the requirement for flaw detection?
The weld connecting the jacket to the inner cylinder shall be a Class C weld, and this weld generally requires surface inspection. The welds at the joints of the head sections generally require 100% radiographic inspection; the acceptance standard is the same as that for the main body of the container, and it is required that the head section manufacturer carry out this inspection.
The weld connecting the jacket to the inner cylinder should be a Class D weld, right? ! ! !
The original poster suggests that you take a look at the post in the link below; I hope it will be useful to you: http://bbs.hcbbs.com/thread-673212-1-1.html
100% surface inspection shall be conducted on the circumferential weld joints between the jacket and the cylinder.
Based on which terms is this? What are the standards?
Based on which terms is this? What are the standards?
Based on which terms is this? What are the standards?
5.0.6 in HG/T20569-2013.
This is a requirement specified in the standards for mechanical mixing equipment; for equipment that does not involve mixing, this welding joint is still considered an important one. The requirements set out in the standards represent the minimum standards, and as a designer, it is necessary to establish additional requirements as well.
The material of both the jacket and the cylinder is 304. The drawings do not specify any PT testing requirements for the fillet welds between the jacket and the cylinder; therefore, does the welding engineer need to include such PT testing requirements in the welding procedure specification?