Magnum NDT technicians encounter many distinctive fastening positions once playing non-destructive testing. In undisciplined hands, fastening is often a security hazard. That’s why skilled commonplace organizations like ASME, AWS, ISO, JWES build rules and classifications for fastening positions.
Welders should be certified in every position so as to perform those styles of welds. Pipe welding position is often divided into four groups: 1G, 2G, 5G, and 6G.
5g welding position
In the 5G fastening position, the pipe is within the horizontal position. not like the 1G position, the pipe is during a fastened position and it can not be turned. The artisan moves around the pipe within the vertical direction to perform the fastening.
6g weld position
In the 6G fastening position, the pipe slopes at more or less 45° from the horizontal (X) axis or 45° from the vertical (Y) axis. The pipe is during a fastened position, therefore the artisan should move around the pipe to perform the fastening. this is often a complicated fastening position that needs an excellent deal of expertise and technical experience.
Why need four positions?
The need for four totally different positions is a result of the fastening that affects the flow of liquified filler metal. Within the flat position, the law of gravity attracts the liquified metal downward into the joint creating the fastening faster and easier. Horizontal fastening is comparatively tough, as a result of the liquified metal sags or flows down onto the lower plate.
Vertical fastening is completed in a very vertical line from bottom to prime. The overhead fastening position is that the toughest position. Since the weld metal flows downward, the overhead position demands sizeable observe to provide impeccable quality welds.
Though the terms flat, horizontal, vertical, and overhead precisely describe the positions for plate fastening, they are doing not sufficiently describe pipe fastening positions. In pipe fastening, there square measure four basic check positions used however the positions check with the position of the pipe and not the position of the person fastening.
Preference of positions for welding
If you’re discussing the flat, horizontal, vertical, or overhead fastening position, flat is often preferred. it’s typically less complicated for an artisan to figure flat welds and so they’re more cost-effective.
The prime reason why you’ve got to weld in alternative positions is that the structure that’s being assembled can not be repositioned within the manner you would like. Technically speaking, a professional artisan ought to be able to manufacture constant quality of weld no matter the positions.
Putting the conductor into the holder at a ninety-degree angle is prescribed for flat position fastening and golf shot the conductor straight out is usually recommended for fastening within the overhead position.
If you recognize a professional and intimate weld operator, raise him/her to look at your weld and additionally examine your finished welds. they’ll tell you plenty concerning what you will be doing is true and what must be corrected.
Gotten your information about pipe positions? Nows the time to learn more about How To Replace Rocker Panels Without Welding!