Re: [MW:34447] Clarification regarding T,K,Y JOINTS WELDING

      The answer is No. 

      Know the differences between their bevel preparations. Hope the following will help you understand them: 

·        The difference between the 6G and 6GR positions is the restriction ring and the bevel preparation. 6G is prepared 

     as a single 'vee' at 45 degrees position with the horizontal plane, while the 6GR bevel preparation is a single bevel 

     and the two connecting pipes have different thicknesses, one is thicker by at least 4-6mm.

·        What differentiates the 6G from the 6GR? 

·        Firstly, the difference between both is the R in the 6GR. The letter R indicates that 6GR welding consists of a restricting 

     ring. Another difference between the 6G and 6GR is the bevel preparation. Bevel preparation is a procedure done to 

     prepare the metal before one can start welding. The welder cuts a slope at a specific angle on the metal, particularly at 

     the edge.  

·        If you are familiar with the 6G and 6GR test positions, you will understand how important both are when welding pipe and 

     tubular structures.

·        Now let's look at what the 6G and 6GR positions imply to help broaden our understanding of how they differ.

·        What's the 6G all about?

·        Firstly, the 6G position is the type whereby your tubular weld joint has to be included at an angle of 45 degrees. It's a difficult 

     test to pass, though not impossible. 

·        What is the 6GR all about? 

·        6GR turns out to be more challenging, you will find a restriction plate wrapped around the pipe's circumference here. This plate 

     restricts the angle of the filler metal or electrode. And as a consequence of this restriction, welding becomes more challenging 

     than it should be.

·        So, when you find a 6GR welder, know that the said individual has successfully overcome the obstacle in this test piece and 

     welded it perfectly to have gotten that certification. The R means there's an obstacle to overcome.

·        Further, another notable difference is that obtaining the 6G certificate qualifies a welder to weld pipe butt in all positions. On the 

     other hand, obtaining the 6GR certification means the welder is qualified to weld structural TKY connections.

C Sridhar.

 

On Wed, 26 Jul 2023 at 13:18, Uma sankar Sankar <umasankar6246@gmail.com> wrote:

Dear Experts

                        Can 6G qualified welder can weld T,K,Y joints,yes or no.If yes why,if no why.

Why only 6GR qualified welder only can weld T K Y JOINTS?

What type of NDT required?

How to weekly Repair rate of welder.

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