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SHIELDING GASES
Shielding gas is directed by the torch to the arc and weld pool to protect the electrode and the molten weld metal from atmospheric contamination.
Argon and helium or mixtures of the two are the most common types of inert gas used for the shielding. Argon hydrogen mixtures are used for special applications.
Q. Production Test Rings? The frequency for the tests shall be as follows: • One sample at the 10th joint • One sample at the 75th joint • One sample at the 300th join
Q. Explain about Post-weld Heat Treatment? Post-weld Heat Treatment (PWHT) shall be in accordance with the Code. PWHT procedures, including properly identified charts or certi
please share some basic theory material
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how to solve numerical of proell governor
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