Show the welding processes and restrictions, Mechanical Engineering

Q. Show the Welding Processes and Restrictions?

Welding may be performed manually, semi-automatically and or automatically using any process or combination of processes accepted by ASME Section IX and this specification, provided the same welding process or the combination of welding processes has or have been used in the Procedure Qualification Record, PQR. If not, fresh PQR with the applicable welding process have to be resubmitted for approval.

No welding processes other than the following are authorized for use:

a. SMAW - Shielded Metal Arc Welding

b. GTAW - Gas Tungsten Arc Welding

c. SAW - Submerged Arc Welding

d. GMAW - Gas Metal Arc Welding (short arc process only) and only for root pass

Where access or wall thickness precludes the use of double welded butt joints, single welded joints shall be made using a root pass deposited by the GTAW or GMAW (short arc process only).

Gas tungsten arc welding shall require the addition of filler metal.

Internal purging with inert gas is required for gas tungsten arc welding of single-welded butt joints in non-ferrous metals, and ferrous metal with over 3% total alloy content.

Repair welding shall be with low hydrogen process. At least one repair procedure shall be qualified for all position welding.

Posted Date: 7/10/2013 1:43:09 AM | Location : United States







Related Discussions:- Show the welding processes and restrictions, Assignment Help, Ask Question on Show the welding processes and restrictions, Get Answer, Expert's Help, Show the welding processes and restrictions Discussions

Write discussion on Show the welding processes and restrictions
Your posts are moderated
Related Questions
Kelvi n Plank Statement: Sol: It is impossible to construct this type of H.E. that operates on cyclic process and converts all the heat supplied to it into equivalent

Illustrate the structure of SET SET allows the exchange of data between different CAD/CAM systems and also between CAD/CAM systems and central data banks. It features a much mo

Polygon law of forces

methods involved in grouping the parts into families?

A steam boiler, 3 m in diameter, is made of 25 mm thick mild steel plates. The efficiency of longitudinal riveted joint is 88% and that of circumferential riveted joint is 70%. Cal

Objectives After studying basics troubleshoot of motorcycle, you should be able to check, perform inspection and identify the reason(s) of various problems reported by

Describe vibration, How to calculate vibration?

Carbon Dioxide (CO 2 ) Lasers   The CO 2 laser is a gas discharge device and it operates by electric excitation of an active medium that is a mixture of helium, nitrogen an

TYPE OF DEFECTS AND THEIR SIGNIFICANCE   Defects in weldments in general can be classified as follows: I. Defects involving inadequate bonding Lack of fusion Incom