The difference between 6G and 6GR welders

Both are related to Pipe / tubular structure welding

These are welding position to which a welder / welding procedure is qualified to.

6G is a postion which the tubular weld joint is inclined to 45 degree angle. So welder has to weld the test piece in that postion to get qualification.

6GR means nothing but a restriction ring on that 6G postioned test coupon. 6GR postion qualification is mandatory for welder / procedure qualification of TKY joints in tubular structural construction.

6G POSITION
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6GR POSITION